529:(12) Cleaning system β A portable or plumbed in vacuum cleaning system shall be provided. All vacuum pumps shall be equipped with hair and lint strainers. Recirculation or separate vacuum pumps shall not be used for vacuuming purposes when above 3 horsepower. When the system is plumbed in, the vacuum fittings shall be located to allow cleaning the pool with a 50-foot maximum length of hose. Vacuum fittings shall be mounted no more than 15 inches below the water level, flush with the pool walls, and shall be provided with a spring-loaded safety cover which shall be in place at all times. Bag type cleaners that operate as ejectors on potable water supply pressure must be protected by a vacuum breaker. Cleaning devices shall not be used while the pool is open to bathers.
52:
283:
self-contained filter bag and eject the filtered water back into the pool, and another that is a drive motor connected to tractor-like rubber or synthetic tracks and "brushes" tied by rubber or plastic bands to a metal shaft. The brushes, which resemble paint rollers, are located on the front and back of the machine and help remove contaminant particles from the pool's floor and walls (in some designs even the pool steps are included) depending on size and configuration. They also direct the particles into the internal
483:
a suction cleaner is to be operated by the recirculation pump, a gate with a graduated stem or another registering device should be provided for throttling the flow from the pool outlet to permit the pump to operate at maximum efficiency when the suction cleaner is in use. Fixed pipe connections for attachment of suction cleaner to pump suction should be of ample size to reduce friction to a minimum, and the cleaner and all removable connections should be designed to provide a maximum velocity at the suction nozzle.
144:
68:
44:
405:(APHA) recognized the dangers of improperly maintained aquatic facilities and formed a committee in 1918 that, for the next 66 years, issued eleven "Swimming Pools and Other Public Bathing Places Standards For Design, Construction, Equipment And Operation" recommended ordinances and regulations. But for a variety of reasons none of these recommendations were adopted, at least not formally or completely adopted.
234:
pool. This type of cleaner is usually attached via a 1.5-inch hose to a vacuum plate in the skimmer, or a dedicated extraction or "vac" line on the side of the pool. The suction action of the pool's pump provides the needed force for the machine to randomly traverse the floor and walls of the pool, extracting dirt and debris in its path. The first automatic pool cleaner was a suction cleaner.
337:
294:
as many switch off several circulation pumps during the night to allow suspended particles to settle on the bottom of the pool; after a couple of hours, the pool cleaner begins its cleaning cycle. This cleaning cycle is set up to complete before the pumps are turned back on. Although the feature is not necessary for adequate pool cleaning, it saves energy and improves cleaning efficiency.
242:. Large amounts of debris or larger debris such as leaves and sticks can easily clog the unit or its pump basket. These machines effectively diminish the suction of the main pump - using them will increase the electricity costs and require the main pump and filter system to be serviced more frequently. There are minimal maintenance and part replacement costs on these devices over time.
36:
28:
20:
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and Other Public
Bathing Places". The AHPA referred to its report in 1964 as "Suggested Ordinance and Regulations Covering Public Swimming Pools", with a modified one for "Private Swimming Pools" in 1970. Its last report in 1981 was called "Public Swimming Pools: Recommended Regulations for Design and Construction, Operation and Maintenance".
258:
Pressure-side cleaners are better suited for handling a heavy amount of debris. They are also better for large debris such as leaves, acorns, and sticks. The purchase cost of this type of cleaner range from $ 200 to about $ 700 plus the costs of the booster pump, usually over $ 200. Some more sophisticated models can cost over $ 1,000.
60:
1080:
Environmental
Studies Board, National Academy of Sciences National Academy of Engineering, Washington, D.C., 1972-EPA-United States Environmental Protection Agency. The United States Environmental Protection Agency Guide, 2 Swimming Pool Architects, and Building Branch at the Department for Education
945:
Report of the Joint
Committee on Bathing Places of the A.P.H.A. and the Conference of State Sanitary Engineers 1926, Swimming Pools and Other Public Bathing Places Report of the A.P.H.A. and the Conference of State Sanitary Engineers, presented to the Public Health Engineering Section of the American
482:
E. Suction
Cleaner: In the opinion of the committee the only satisfactory method of removing the dirt, hair, etc., settling on the bottom of a pool is using a suction cleaner. As the circulation pumps generally operate such cleaners, they may be classed as an adjunct to the recirculation system. When
408:
The APHA has tried to develop a uniform aquatic health code, or what is referred to for years as referenced above, and published short reports annually from 1920 through 1925 that it simply referred to as "Report of the
Committee On Bathing Places". In 1926 it published its first comprehensive report
309:
The major benefits of these machines are efficiency in time, energy, and cleaning ability and low-maintenance requirements and costs. The major disadvantage is purchase cost which can range from $ 500 to $ 1,500. The smart navigation system present on many robots makes it possible to cover the entire
297:
To move forward and backward and navigate walls and steps, electric robotic cleaners rely on three natural principles: traction and movement caused by the drive motor and tracks, buoyancy created by the large areas inside the machine that fills with air, and the force resulting from the high pressure
498:
A vacuum-cleaning system shall be provided. When an integral part of the recirculation system, sufficient connections shall be located in the walls of the swimming pool, at least eight inches below the waterline and, "Visible dirt on the bottom of the swimming pool shall be removed every 24 hours or
193:
In 1953, another notable suction-side pool cleaner was created by Joseph
Eistrup, who called his invention "Pool Cleaner". Two years later, the "Automatic Swimming Pool Cleaner" was created by Andrew L. Pansini; it was the first truly automatic pool cleaner and was touted by Pansini as "effective to
974:
American
Journal of Public Health, Sanitary Engineering Section American Public Health Association, Sanitary control of a public swimming pool George W. Simons, Jr., Chief Sanitary Engineer, Florida State Board of Health, Jacksonville, FLA., Read before Sanitary Engineering Section, American Public
435:
None of the proposed
Standards included more than a passing reference of the need to properly clean a pool. A few, but not all of these recommended ordinances and regulations, related to the use of a vacuum, though the first that included any specificity in 1923 at least required a certain level of
318:
All commercial pool cleaners are electric robotic and can range in price from a little over $ 1,000 to upwards of $ 15,000. They closely resemble residential models but in addition to their addition size, they are made with heavy-duty components, more sophisticated computer guidance, and on-and-off
293:
These machines may also be directed by sensors located in the bump bars which, on contact with objects such as a wall, cause a reverse in direction, with a small offset allowing it to move one machine's width over on each crossing of the pool. The delay timer is an important feature for many pools,
237:
Suction-side cleaners are the least expensive and most widely used pool cleaners. The price of suction-side cleaners ranges from $ 250-$ 650. They are powered solely by the main pump of the pool and utilize the pool's filter system to remove dirt and debris from the water. Suction-side cleaners are
129:
In 1883 John E. Pattison of New
Orleans applied for a "Cistern and Tank Cleaner" and the first discovered patent was issued the following year. It swept and scraped the bottom of a cistern or tank and, through a combination of suction and manipulation of the water pressure, was able to separate and
412:
However, its lack of authoritative power is implied by the changing description of what was limited to their recommendations or suggestions and the expressed purposes in issuing them. In 1957, it referred to its report as "Recommended
Practice for Design, Equipment, and Operation of Swimming Pools
233:
This type of pool cleaner pumps water out of the pool via its skimmer or drains, uses it for locomotion and debris suction, then returns it after being filtered via pool return or outlet valves. This is the least expensive and most popular type of cleaner, and it traces a random course around the
552:
Each health and safety segment was assigned to a committee to study it and draft a proposed module open for public comment before being adopted and recommended to the nation's 3200+ state and local health agencies that enact ordinances and regulations for swimming pools and spa and other aquatic
515:
A vacuum cleaning system shall be available which is capable of removing sediment from all parts of the pool floor. A cleaning system using potable water shall be provided with an approved backflow protection device as required by the California Department of Public Health under Sections 7601 to
305:
The combination of these three natural principles and an internal mercury switch that tells the microchip that the unit has gone from a horizontal to a vertical position allows it to change direction from ascending to descending the wall at pre-programmed intervals based on the average height of
200:
The pressure-side cleaner was invented by Melvyn Lane Henkin in 1972. It was called the "Automatic Swimming Pool Cleaner" and it used three wheels to allow the machine "to travel underwater along a random path on the pool vessel surface for dislodging debris therefrom". The design is used in the
257:
The pressure causes turbulence in the water, distributing some debris onto the floor and walls of the pool, some of which are re-floated to the pool surface before being sucked into the main filter through the skimmer inlets. A portion of the dirt and debris is caught in an attached filter bag.
955:'Recommended Practice for Design, Equipment, and Operation of Swimming Pools and Other Public Bathing Places' Prepared by the Joint Committee on Bathing Places of the Conference of State Sanitary Engineers and the Engineering and Sanitation Section of the American Public Health Association 1957
503:
The CDC was founded (in 1946), followed by the Cabinet-level Department of Health, Education and Welfare (in 1953), now the Department of Health, and Human Services and its eleven operating divisions, the National Health Service Corps (in 1977), and a variety of private and non-profit aquatic
462:
No swimming pool shall be opened to the use of bathers on any day until all visible dirt (not stains) on the bottom of the pool and any visible scum or floating matter on the surface has been removed. Scum and floating matters may be infectious material and should always be removed as soon as
975:
Health Association, at San Francisco, Cal. September 17, 1920 Report of the committee on bathing places Read before the Sanitary Engineering Section of the American Public Health Association at the Fiftieth Annual Meeting, New York City, November 17, 1921, and adopted by a vote of the Section
440:
Pool cleaning is done by completely emptying the pool an average of twice weekly and scrubbing with stiff brushes and soap. Hose flushing follows the scrubbing. After the flushing outlet is opened, the well-turned on and clean water is allowed to water over the floor of the drains, etc...
282:
These cleaners are independent of the pool's main filter and pump system and are powered by a separate electricity source, usually in the form of a set-down transformer that is kept at least 10 feet (3.0 m) from the pool. They have two internal motors: one to suck in water through a
261:
Both suction-side and pressure-side cleaners are dependent on the pool's main pump and filter system to remove contaminants from the pool water, which results in the inability to remove particles smaller than the pore size of the pool's existing filter element. Such elements can be sand,
1002:, James E. Amburgey, Jonathan M. Goodman, Olufemi Aborisade, Ping Lu, Caleb L. Peeler, Will H. Shull, Roy R. Fielding, Michael J. Arrowood, Jennifer L. Murphy, and Vincent R. Hill, "Are Swimming Pool Filters Really Removing Cryptosporidium?' The University of North Carolina at Charlotte
453:
Section 3. Clearness: At all times when the pool is in use the water shall be sufficiently clear to permit a black disk six inches in diameter on a white field, placed on the bottom of the pool at the deepest point, to be visible from both sides of the pool when the water is quiet.
449:, Sanitary Engineering Section American Public Health Association read before the Sanitary Engineering Section of the American Public Health Association at the Fifty-second Annual Meeting at Boston, Massachusetts, October 8, 1923. slightly longer, but still very brief, stated:
431:
In 1918, a committee on swimming pools was appointed at the APHA's annual meeting in Chicago and a similar committee was appointed at the meeting in Washington, D.C., two years later. Despite their intended and published goals, none became law, uniform, much less national.
478:. Of all of its reports from 1920 through 1981, the first major report by the APHA in 1926, written in narrative form as were the succeeding nine until 1957, the committee included the detailed provisions relating to pool cleaning, vacuuming and vacuums:
1149:
James E. Amburgey "Removal of Cryptosporidium-Sized Polystyrene Microspheres from Swimming Pool Water with a Sand Filter with and without Added Perlite Filter Media", Journal of Environmental Engineering, Volume 137, Issue 12, December 1, 2011,
1160:
Thulin JD, Kuhlenschmidt MS, Rolsma MD, Current WL, Gelberg HB "An intestinal xenograft model for Cryptosporidium parvum infection". Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois Urbana 61801,
489:
A. Visible dirt on the bottom of a swimming pool shall not be permitted to remain more than 24 hours. B. Any visible scum or floating material on the surface of a pool shall be removed within 24 hours by flushing or other effective means
130:
remove sediment without removing the water. Over the next 20 years his invention was revised multiple times. Many pool cleaner patents issued in the modern era refer to some of the cistern cleaners as predecessors of their invention.
549:, much like the APHA did in 1912, gathered many of the United States' foremost medical and scientific experts to study the concern for aquatic health. As a result, in 2007 they began to consolidate a uniform aquatic health code.
186:
citizen John M. Davison. On November 26, 1912, he submitted a patent application to the United States Patent and Trademark Office entitled "Cleaning Apparatus For Swimming Pools And The Like", which was issued on March 25, 1913.
507:
A variety of states and jurisdictions have codified the requirement of inclusion of an independent vacuum cleaner, including the two states with the highest number and concentration of both residential and public pools:
224:
There are three main types of automated or automatic swimming pool cleaners, classified by the drive mechanism and source of power used: a suction side cleaner, a pressure side cleaner, and an electric robotic cleaner.
1066:
Okhuysen PC, Chappell CL, Crabb JH, Sterling CR, Dupont HL "Virulence of three distinct Cryptosporidium parvum isolates for healthy adults", Journal of Infectious Diseases, Volume 180, Issue 4, pp. 1275β128
1069:
Capet C. Kapel N, Huneau JF, Magne D, Laikuen R, Tricottet V, Benhamou Y, Tome D, Gobert JG "Cryptosporidium par-vum Infection in Suckling Rats: Impairment of Mucosal Permeability and Na+-Glucose Cotransport",
560:
University of North Carolina Charlotte Associate Professor James Amburgey conducted many tests to evaluate existing swimming pool filters and he concluded that they have been extremely ineffective in removing
1123:
James E. Amburgey, Kimberly J. Walsh, Roy R. Fielding and Michael J. Arrowood "Removal of Cryptosporidium and polystyrene microspheres from swimming pool water with sand, cartridge, and pre-coat filters",
964:
American Journal of Public Health, Sanitary Engineering Section American Public Health Association, Volume 11, April 1912, Issue 4, Read at the annual meeting of the Association, held in Havana, December
302:(PVA), which has an adhesive quality that allows the unit to cling to the walls, steps, and floors. It is resistant to dirt and oil, which improves its lifespan over rubber or other synthetic materials.
250:
In this design, pool water inflow is further pressurized using a secondary "booster" pump on most but not all models. This high-pressure water is used for locomotion and debris suction to exploit the
194:
remove the scum, dirt and other accumulations from both the bottom and sidewalls of a pool to disperse foreign matter in the water for removal therefrom by a normal pump-filter system of the pool".
71:
Weda B480 robotic commercial pool cleaner for the largest public pools. They now come in many smaller sizes from several manufacturers with a wide array of sophisticated, computerized programs.
290:
An internal microchip is programmed to control the drive motors. The chip causes the machine to change direction when it reaches a wall or the water surface after climbing the pool walls.
409:
in its journal: "Standards for Design, Construction, Equipment, and Operation for Swimming Pools and Other Public Bathing Places". Twelve other reports were published through 1981.
1021:
Yoder J, Blackburn B, Levy DA, Craun GF, Calderon RL "Surveillance for waterborne-disease outbreaks associated with recreational waterβthe United States", Beach MJ. 2001-2002.
1052:
Delaunay A. Gargala, G, Li X, Favennec, L, Ballet JJ, "Quantitative Flow Cytometric Evaluation of Maximal Cryptosporidium Parvum Oocyst Infectivity in a Neonate Mouse Model",
504:
organizations such as the National Spa and Pool Association (in 1956), now the Association of Pool and Spa Professionals the National Swimming Pool Foundation (in 1965).
254:. The cleaner traces a random course around the pool. The requirement of a booster pump makes pressure-side cleaners the most expensive in terms of electricity use.
428:
in April 1912, a meeting was held in Havana the previous December. One of the subjects being studied at the New York meeting was the "Hygiene of swimming pools".
499:
more frequently as required. Visible scum or floating matter on the swimming pool surface shall be removed within 24 hours by flushing or other effective means.
1116:
Fiona L. Henriquez, Thomas A. Richards, Fiona Roberts, Rima McLeod and Craig W. Roberts "The unusual mitochondrial compartment of Cryptosporidium parvum" -X.
306:
swimming pool walls. Some machines have delayed timers that cause the robot to remain at the waterline, where more dirt accumulates, to momentarily scrub.
390:
393:
in Atlanta, Georgia, on a grant provided by the National Swimming Pool Foundation (NSPF), published the first uniform Model Aquatic Health Code (MAHC).
55:
In 2002 the first handheld/extended reach, battery-powered pool and spa vacuums were finally invented. They now come in many sizes for all applications.
1168:"Neutralization of cryptosporidium parvum sporozoites by immunoglobulin and non-immunoglobulin components in serum-Hill", BD. Dawson AM, Blewett, DA,
1086:
Cryptosporidiosis. A report on the surveillance and epidemiology of Cryptosporidium and epidemiology of Cryptosporidium infection in England and Wales
417:
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of water being emitted from the top of the machine that pushes it against the floor and walls. Some electric robotic machines use brushes made out of
123:
1179:
Volume 55, Issue 11, November 1987, pp. 2669β2674, Comparative Medicine Division, St. Jude Children's Research Hospital, Memphis Tennessee 38101
1175:
Moredun Research Institute, Edinburgh, "Characterization of cyclophosphamide-rat model of cryptosporidiosis", Rehg JE, Hancock ML, Woodmansee DB.,
354:
898:
112:
cleaners. The forerunner of today's pool cleaners were cistern cleaners; they were developed due to the need to clean pools and cisterns.
51:
1059:
Huw. V. Smith, Rosely, A. B. Nicols, Anthony M. Grimason, "Cryptosporidium excystation and invasion: getting to the guts of the matter",
553:
facilities, inspect and monitor the facilities, and enforce the regulations. Since the focus of the MAHC was to respond to the threat of
857:
402:
820:
787:
376:
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190:
The first suction-side pool cleaner was invented by Roy B. Everson of Chicago in 1937 and was named the "Swimming Pool Cleaner".
1084:
Gordon Nichols, Rachel Chalmers, lain Lake, Will Sopwith, Martyn Regan, Paul Hunter, Pippa Grenfell, Flo Harrison, Chris Lane,
919:
358:
389:
There have been attempts for nearly 100 years to mandate the use of pool cleaners, primarily addressed to public pools. The
1184:
Removal of Cryptosporidium and polystyrene microspheres from swimming pool water with sand, cartridge, and precoat filters
1131:
Paul A. Rochelle, Steve J. Upton, Beth A Montelone and Keith Woods "The response of Cryptosporidium parvum to UV light",
1153:
J. Lepage P. Rouvroy D, Vandepitte, J "Cryptosporidium spp., a frequent cause of diarrhea in Central Africa Bogaerts",
158:
1140:
Disposable swim diaper retention of Cryptosporidium-sized particles on human subjects in a recreational water setting
347:
320:
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issued the first patent for a swimming pool cleaner, the Sanitary Engineering Section of the APHA convened in
1193:
Swansea University, Wales, Biofilm- A Nasty that's in your Pool! Professional Pool Operators of America, 2012
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clarity. The 1921 report, barely a few pages in length, made this reference to the need to clean the pool:
584:
525:
Florida: Florida Department of Health section 64E-9.007 Recirculation and Treatment System Requirements:
205:
511:
California: 2010 Title 24, Part 2, Vol. 2 California Building Code. Section 3140B, Cleaning Systems:
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A New Method For Removing and Inactivating Water-borne Pathogens Utilizing Saline Treated Materials
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284:
263:
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993:
Florida Department of Health section 64E-9.007 Recirculation and Treatment System Requirements
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894:
888:
853:
816:
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197:
The first robotic pool cleaner that used electricity was invented by Robert B. Myers in 1967.
810:
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to lay the groundwork for the first recommended pool and spa regulations. As reported in the
841:
213:
545:
1191:
Optimisation of pool water filtration for Cryptosporidium oocyst removal and new research
946:
Public Health Association at the Fifty-sixth Annual Meeting at Cincinnati, Oct. 18, 1927,
401:
The proposed MAHC is not the first attempt to propose a uniform aquatic health code. The
43:
984:
2010 Title 24, Part 2, Vol. 2 California Building Code. Section 3140B, Cleaning Systems
574:
474:
It was not until 1926 that the first true report was issued and later published in the
251:
80:
67:
35:
27:
1198:
The Role of the Schmutzdecke in Pathogen Removal in Slow Sand and Riverbank Filtration
543:
In 2005 the CDC, in response to growing concern and feared epidemic with the pathogen
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1204:
Equipment for Swimming Pools, Spas, Hot Tubs, and Other Recreational Water Facilities
842:
589:
421:
119:
1074:. Volume 91, Issue 2, February 1999, pp. 119β125, Water Quality Criteria, 1972"
904:
826:
209:
183:
105:
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the Technical Committee of Recirculation Systems and Filtration is a major focus.
270:, or other natural or synthetic materials. That particle size ranges from under 5
126:
refers to a cistern cleaner patent filed (though never issued) as early as 1798.
739:
336:
201:
Polaris Pool Cleaner, a commonly used pool cleaner amongst modern pool owners.
31:
The first patented cistern cleaner, the forerunner of the swimming pool cleaner
1182:
James E. Amburgey, Kimberly J. Walsh, Roy R. Fielding and Michael J. Arrowood
1044:
2005 International Symposium on Household Water Management, Model Health Code.
812:
Line by Line:How to Make the Swimming Pool Construction Agreement Work for You
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23:
Below ground, outdoor pressure side automated pool cleaner visible at bottom
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Cryptosporidium Occurrence in Wastewaters and Control Using UV Disinfection
1106:
Volume 2 Swimming Pools and Similar Environments World Health Organization
19:
468:
319:
systems. In the US, commercial pool cleaners need to be certified by the
88:
118:
were well-known for their elaborate cisterns and prevalent in the early
1031:
World Conference on Drowning Prevention May 13, 2011, Da Nang, Vietnam.
579:
361: in this section. Unsourced material may be challenged and removed.
267:
114:
109:
59:
39:
2012 was the Centennial anniversary of the first swimming pool cleaner.
1109:
Franz J. Maier "A System for Fluoridating Individual Water Supplies",
238:
best suited for screened-in pools or those with light debris such as
84:
1200:
Presenta-tions/unger_schmutzdecke.pdf, University of New Hampshire
66:
58:
50:
42:
34:
26:
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47:
R.B. Everson invented the first suction-side pool vacuum cleaner.
239:
1189:
B T Croll, C R Hayes, C J Wright, S Williams, and D. Rowlands
330:
137:
1211:
Water and Waste Water Filtration: Concepts and Applications
1209:
Kuan Mu Yao, Mohammad T. Habibian, and Charles R. O'Melia
874:"Leslie's Pool Supplies | Suction Side Pool Cleaners"
471:
collect in the pool and should be removed was recognized.
1094:
International Ultra-Violet Association- Volume 6, Issue 3
920:"Swimming pool care, repair offer wave of job potential"
212:
from the Belgian Congo, introduced the Kreepy Krauly in
178:
The first swimming pool cleaner was invented in 1912 by
1206:. National Sanitation Foundation International Standard
1029:
Progress of the U.S. Model Aquatic Health Code Project
740:"US patent 3,822,754: Automatic swimming pool cleaner"
1157:, Volume 20, Issue 5, November 1984, pp. 874β876
1146:, Volume 9, Issue 4, September 2011, pp. 653β658
761:"US Patent 3,822,754 Automatic Swimming Pool Cleaner"
698:"US Patent 3,032,044 Automatic swimming pool cleaner"
274:
for diatomaceous filters to 50+ ΞΌm for sand filters.
91:
from swimming pools with minimal human intervention.
1165:, Volume 62, Issue 1, January 1994, pp. 329β331
1090:
Jennifer L. Clancy, Karl G. Linden, Randi M. McCuin
635:"US Patent 1,056,779 Portable electric pool cleaner"
1135:, Volume 21, Issue 2, February 2005, pp. 80β87
1104:
Guidelines for Safe Recreational Water Environments
1078:
A report of the Committee on Water Quality Criteria
467:In 1921, the fact that infectious material, namely
848:(3d ed.). McGraw Hill Professional. p.
494:The 1964 report included the following language:
476:Journal of the American Public Health Association
1172:, Volume 54, Issue 3, May 1993, pp. 356β360
1063:volume 21, Issue3, March 2002, pp. 133β142.
1034:William R. Peterson, PH.D. and Renee E. Berman
527:
513:
496:
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438:
416:In 1912, coincidentally the same year when the
204:Independently from his American counterparts,
1048:New Code Aims at Standards for Nation's Pools
8:
614:"US Patent 302,353 Cistern and Tank Cleaner"
890:Applied Intelligent Systems: New Directions
719:"US Patent 3,439,368 Swimming Pool Cleaner"
656:"US Patent 2,141,811 Swimming pool cleaner"
391:Centers for Disease Control and Prevention
323:(NSPF) as Certified Pool Operators (CPO).
1016:Statistical abstract of the United States
418:United States Patent and Trademark Office
377:Learn how and when to remove this message
208:, a hydraulics engineer who emigrated to
124:United States Patent and Trademark Office
16:Type of vacuum cleaner for swimming pools
1138:James E. Amburgey and J. Brian Anderson
143:
104:Swimming pool cleaners evolved from the
1099:University of Georgia Research Magazine
1097:"In Search of Crypto's Achilles Heel",
783:"SA inventions clean the world's pools"
605:
1215:Environmental Science & Technology
1054:Applied and Environmental Microbiology
844:The Ultimate Guide to Pool Maintenance
1042:Making Waves in the Aquatics Industry
63:Typical electric robotic pool cleaner
7:
1128:, Volume 10, Issue 1, pp. 31β42
1056:, Volume 66, Issue 10, p. 4315.
1018:, 1995. 115th ed. Washington, DC: US
1014:United States Bureau of the Census.
359:adding citations to reliable sources
1217:, Volume 5, Issue 11, November 1971
1120:, Volume 21, Issue 2, February 2005
781:Bruton, Mike (September 23, 2011).
1038:Coating Systems Laboratories, Inc.
918:Morgan, Kim Kyle (July 12, 2013).
677:"US Patent 2,902,705 Pool Cleaner"
463:possible after they are observed.
403:American Public Health Association
14:
1111:American Journal of Public Health
788:Independent Online (South Africa)
447:American Journal of Public Health
426:American Journal of Public Health
1155:Journal of Clinical Microbiology
335:
142:
1113:, Volume 48, Issue 6, June 1958
346:needs additional citations for
1170:Research in Veterinary Science
1:
321:National Spa Pool Foundation
153:appears to contradict itself
83:that is designed to collect
1144:Journal of Water and Health
1126:Journal of Water and Health
887:Fulcher, John, ed. (2012).
815:. Owner Pools. p. 40.
1257:
1072:Experimental Parasitology
893:. Springer. p. 189.
216:, South Africa, in 1974.
840:Tamminen, Terry (2007).
151:This article or section
1231:Swimming pool equipment
809:Worthey, Randy (2008).
445:The 1923 report of the
327:Controlling legislation
1177:Infection and Immunity
1163:Infection and Immunity
1133:Trends in Parasitology
1118:Trends in Parasitology
1061:Trends in Parasitology
1023:Surveillance Summaries
585:Robotic vacuum cleaner
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523:
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397:Historical perspective
77:automated pool cleaner
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1186:, IWA Publishing 2012
161:for more information.
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355:improve this article
1025:, October 22, 2004.
486:XXVI Cleaning Pool
314:Commercial versions
1150:pp. 1205β1208
595:Water purification
264:diatomaceous earth
206:Ferdinand Chauvier
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925:Houston Chronicle
900:978-3-642-05942-1
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565:in most cases.
563:Cryptosporidium
555:Cryptosporidium
546:Cryptosporidium
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766:September 24,
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344:This section
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310:more easily.
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929:. Retrieved
923:
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905:Google Books
903:– via
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882:
868:
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835:
827:Google Books
825:– via
811:
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792:. Retrieved
786:
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764:. Retrieved
755:
743:. Retrieved
734:
722:. Retrieved
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353:Please help
348:verification
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184:Pennsylvania
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134:Early models
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106:water filter
103:
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167:August 2020
1225:Categories
601:References
180:Pittsburgh
108:and early
469:pathogens
159:talk page
100:Evolution
1236:Cleaning
569:See also
532:β
519:β
89:sediment
580:Hot tub
268:zeolite
214:Springs
115:Thermae
110:cistern
95:History
1081:(DFE).
897:
856:
819:
516:7605.
285:filter
122:. The
85:debris
287:bag.
220:Types
79:is a
965:1911
933:2019
895:ISBN
854:ISBN
817:ISBN
796:2019
768:2013
747:2019
726:2013
705:2013
684:2013
663:2013
642:2013
621:2013
240:sand
87:and
850:309
357:by
75:An
1227::
1213:.
1142:,
922:.
852:.
785:.
272:ΞΌm
266:,
182:,
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165:(
155:.
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