REPORT RESUME: SED 019 899 EF 601 791

ADJUSTABLE OUTPUT RATE CHEMICAL FEEDING EQUIPMENT FORSWIMMING POOLS. NATIONAL SANITATION FOUNDATION STANDARDNUMBER 19.NATIONAL SANITATION FOUNDATION, ANN ARBOR, MICH.

PUB DATE JAN 67

EDRS PRICE MF-S0.25 HC-$0.80 18P.

DESCRIPTORS- *EQUIPMENT STANDARDS, *PUBLIC HEALTH,*RECREATIONAL FACILITIES, *SWIMMING POOLS, SANITATION,

THE SCOPE OF THIS STANDARD COVERS ADJUSTABLE OUTPUT RATECHEMICAL FEEDERS, WHETHER USED FOR SOLUTIONS, SLURRIES ORSOLIDS. IT ALSO INCLUDES AUXILIARY EQUIPMENT SUCH AS PUMPS,STRAINERS,' TUBING CONNECTIONS, TANKS, INJECTION FITTINGS ANDOTHER REQUIRED COMPONENTS. THE FEEDERS DESCRIBED ARE INTENDEDTO BE DESIGNED AND USED SPECIFICALLY FOR CHEMICAL FEEDING FORBOTH PUBLIC AND PRIVATE RESIDENTIAL SWIMMING POOLS. NOTINCLUDED IN THIS STANDARD ARE GASEOUS FEED EQUIPMENT, FEEDERSWITHOUT ADJUSTABLE OUTPUT RATES, OR FEEDERS WHOSE OUTPUT RATEIS DEPENDENT ON THE FLOW RATE OF THE MEDIUM INTO WHICH THECHEMICALS ARE INTRODUCED. SECTION 1 INCLUDES7(1) MINIMUMREQUIREMENTS, (2) ALTERNATE MATERIALS, (3) REVIEWS ANDREVISIONS, AND (4) VARIATIONS IN DESIGN AND OPERATION.SECTION 2 COVERS DEFINITIONS AND TERMINOLOGY. SECTION 3,SUITABLE MATERIALS, AND SECTION 4, DESIGN AND CONSTRUCTION.(RH)

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NATIONAL SA=ATION rOUNDATION

STANDARD NUHBER 19

Relating to

ADJUSTABLE OUTPUT RATE CIE ICAL FEEDING EQUI=NT

for

srannTNG POOL S

U.S. DEPARTMENT OF HEALTH, EDUCATION & WELFARE

OFFICE OF EDUCATION

THIS DOCUMENT HAS BEEN REPRODUCED EXACTLY AS RECEIVED FROM THE

PERSON OR ORGANIZATION ORIGINATING IT. POINTS OF VIEW OR OPINIONS

STATED DO NOT NECESSARILY REPRESENT OFFICIAL OFFICE OF EDUCATION

POSITION OR POLICY.

Prepared by the.

NATIONAL SANITATION FOUNDATION COMIIITTEE

FOR

SWIMMING POOL EQUIPMENT STANDARDS

OCTOBER 1966

THE NATIONAL SANITATION FOUNDATIONP. 0. Box 1468

ANN ARBOR, MICHIGAN 48106

1-67

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Reca,ssed Toatomatic nimirPrs and oc. the NSwCcfn.m4tt. fcr Swirng Pr.;o1 Fcrlinpep± Sandardsth.- lona hovtrs spit discuss on anclpondcnce, as cl,:!11 to ti to Tndus,7 Coproitteefor its untir4ng e-Ffol7t.s: in tl-js work.

NATIONJAL FOTN1nATTON COMTVPEE

Fga..7,nzai01.1 ST:7711ING

POOL E0:::1;=.

PUBLIC 177=1 PEP7CS:;]NTATIVES

Ralph Piecr.d, Director^hairmanBureau of Environmental HealthDenartment of Health.Tvrankor4-, Ken+.vtew

Georg Eagle, Engineer in CharGeneral Snitation

geS:

*Department of Health306 Ohio Department BuildingColumbus ID, Chic(Special Public Health Consultant)

William 2q. EonsaDivision of Sanitary Engineering

ro"1"4'M-7sr4' D.4.41^14,4 HealthV .L.0 C.; ... I v .. ... . L

Ill!ncisr(qne Diftb, eal,

Halcoln C. Hope, ChiefGen oral Engineering BranchSanitation En7ine:;rincl. ServicesU.S. Public Health ServiceWashington 25, D. C.(Liaison 1 nresentati1,4e)

Professor John E. Kike-, Jr.Professor of Civil EngineeringUniversity of FloridaGainesville, Florida(Special Public Health Consultant)

C. V. Klassen, ChiefSanitary EngineerDivision of Sanitary EngineeringDepartment of Public 2ealthSpringfield, Illinois(NSF Council of Public Health

Consultant's Representative)

David B. Lee, DirectorBureau of Sanitary EngineeringState Board of hecAthJackilonville 1, Florida(Conference of State Sanitary Engineers

Reoresentative)V

Henry F. EichEnvironmental Sanitation agineerof Angeles County Health Dept.220 N. BrcaduayLos Angeles, Calif. 50012(Conf. of Danicipal Public HealthEngineers Representative)

DJDR S. H. Barboo, Jr., LSC, USHBur. of -kiedicine & Surgery (7223)

Department of the ii&VyWashington 25, D. C.(Liaison i'.epresentative)

Col. Cardis W. BryanATSC (SCD2)Andrews Air Force BaseWashington, D. C. 20331(Liaison Representative)

Earl Probert, SanitatianToledo City Health Department635 N. Erie StreetToledo, Ohio(Representative of Hational

Assoc. of Sanitatians)

Donald J. iueggeState Sanitary EngineerState Board of HealthHadison 2, Wisconsin(Special Public Health Consultant)

John BrinkWashington D. C. Health Dept.Washington, D. C.(Conference of Municipal PublicHealth Engineers Representative)

Col. Robert G. i icCall, USCDirector Engineering ServicesU. S. Army Environmental HygieneAgency

Edgewood Arsenal, Haryland(Liaison RepresentatiVe)

Albert Fishback1725 Korrose DriveLancaster, Ohio(Engineerings & SanitationSection, APHA Rep.)

-VI-

Hanry J. OngerthSupervising Sanitary EngineerSpecial Assistant to Division ChiefDivision of Environmental SanitationState Dept. of Public HealthBerkeley 4, California(2 r, S Secticn Apr-TA)

Lynn II. ThatcherDhief, Bureau of 'SanitationState Department of HealthSalt Lake City 1, Utah(Conference of State SanitaryEngineers Representative)

Charles GillespieGillespie & Powers4829 EastOn AvenueSt. Louis, NIssouri 63113(Engineering & Sanitation SectionAPHA Representative)

flbredith H. Thompson, DirectorBureau of Environmental SanitationState Department of HealthAlbany'l, New York(Special Public Health Consultant)

W. K. Rodman, Sanitary EngineerOffice of the DirectorArchitectural Standards DivisionFederal Housing AdministrationWashington 25, D. C.(Liaison Representative)

Ernest Krauel, Chairman2200 BrightwoodKonterey Park, California(Western Plumbing OfficialsAssoc. Representative)

Earle SudderthDallas City Health Dept.1936 AmeliaDallas, Texas(Special Public Health Consultant)

Kirk T. Hoseley,Commissit)nor of HealthOklahoma State Board of HealthOklahorla City 5, Oklahoma(Conference of State and Terri-.torial Health OfficOrs Representative:

Ivan F. ShullDivisoon of SanitationE f KttateDoard oealhTopeka, Kansas(Sreciai Public EealthConsultants).

B. A. Poole, DirectorEureau of EnvironmentalSanitation

State roa,:cl. of Fealth1330 U. I;ichigan streetImiianapolis, Indiana 46273(Special Public HealthConstIltant)

Tom S. Gable, SecretaryNational Sanitation FoumlationP. 0. "Toy. 2.162

'.. Industry Group

Tom JackscnJohns-Manville Sa-es Corp.Celite Division22 E. -..0th StreetNew York 16, New York(NSPI Representative)

4S10

Donal:: DoughtyAcuatech l]ngineering Co.3469 Nt. DiabloLafayette, California(LSPI Rreprenestative)

W. 0. BakerSwimc ;uip, Inc.3301 Giinan RoadEl :"once, California(NSPI Rrep:esentative)

Robert Steel, Exec. Diector.rational Swimming Pool Inctitu1-r2000 N StreetUashinaton 6 D. C.(NSPI RrenrPseative)

Li. C. RickertI. T. T. ::arlowNicaan,:: Park, L",ew JcrsevWSPI Reoresentative)

Duncan E. Britt, Jr.AssociatesD. Britt

1623 N. Federal 111117.Fort Lauderdale, Florida(NSPI Representative)

IndiviCuals indidated as representing organizations oragencies are.apPointed by their respective groups andgenerally are supporte:: by a comittee or task group from withintheir organization and agency.

-VII-

NATIONAL SAUTTATTW FOTITUATION

COUITCIL OF PUDLIC HERL: CO::SULTA=

-1966-

COUVCIL OP PUBLIC T.EATJTH CONSULTAlaS

January 1966

Chairman: B. A. PooleDirectorBur. of Env. SanitationState Doard of health1330 Uest Gt.Indianapolis, Incliana 46207

*Joel Exhall, Vice Chairman530 PinecrcstLacon, Ceorgia

Rainh 2. Dwork,Delmty Secretary of HealthCommonwealth of PennsylvaniaDepartment of HealthP . o. BON 90Earrisburg, Prhnnsvlvania

George EagleChief Engineer.Ohio State Derartment of HealthP . O. no:t 118Columbus; Ohio 43215

C. Lowe Eller, D.

ConnissicnerSt. Louis County Health Dept.Clayton, Missouri

*Charles A. Farish, SecretaryExecutive DirectorNational Sanitation FoundationP . 0. Eox 1463.Ann Arbor, _Michigan

Alfred H. FletcherDirector, Divn. of .Env. HealthState of ilew Jersey Health Dept.

P . O. Lo:: 1540Trenton, New Jersey 08625

* Uesley E. Gilbertson, ChiefDivn. of fn-.T. Lngineoring and

ProtectionBureau of State ServicesDent. of Health, ::741.1cation 6

TelfareWashington/ C. C. 20201

Larry J. GordenDirector, Environmental Lealth

DepartmentAlbuquerque City Health Dept.P. O. Bom 1293 (2unicipal

Office Building)Albuquerclue, L:ew Mexico 87103

*John J. Hanlon,CommissionerCity Department of HealthDetroit,' Ilchigan 43225

H. G. HansonAssociate Chief for Env. HealthDureau of State ServicesPublic Health ServiceDnpt. of Lealth, Educiation &

tTelfareT:ashington, D. C. 20201

G. R. herzik, Jr.Chief, Env. Sanitation ServicesState Dept. of Public HealthAustin, Texas

COUNCIL OF CONSULTANTS Pare 2 reJanuary, 1o.00Q

rorton S. HinertAssoc. Professor of Env. Eealth '41Ralph C. Pickard, Dil-ectorRoom 251;:3, Schol of Put1.7;_c Division of Lnv. Nealth

HealthUniversity of ::ichiganAnn Arbor, ilich 43igan 106

Dr. Ira Vaughan ILiscock215 Eicjhlancl StreetNew Haven, Connecticut 06511

ilark D. HollisChief InuinectPan. American Health Organization1501 New Vanpshire Avenue, N.17.Tr:Ishington 6, D. C.

*Clarence Y. NlassenChef, Sanitary EngineerDr=na7-t-lont of Public HealthDivn. of Sanitary EngineeringSoringfiel1, Illinois 6270E

George J. Kupchik, Dr. Eng.Dir. of Env. HealthThe American Public Health

Association1790 EroadwayNew York 19, New York

Lxecutive DirectorPublic Health Federation24 00 ReadingCincinnati, Ohio 45202

7ric DoodAsst. Professor of

healthDent of Epidemiology and

Public HealthYale University60 College StreetNew Laven 11, Connecticut

J. W. R. Norton,State Health Director

1"3oar.-.. of Health

Ralcigh, North Carolina 27602

*Executive Committee

Denartment of health.275 East Main StreetFrankfort, Kentucky 40601

John D. Porterfield, L.D.Director, Joint Commission onAccre6litation of Hospitals

645 N. MichiganChicago, Illinois 60611

Verne C. ReiersonPortland State CollegeCenter for Public Health

StudiesP. O. BON 751Portland, Oregon 97207

Charles Senn.Sanitation Engineer-DirectorLos Angeles, Citii-County He alt:

Department.Room 300-220 N. DroadwayLos Angeles, Calif. 90012

Frank L. Steacao ChiefDivision of all/. SanitationState Dept. of Public Health2151 Berkeley 77ayBerkeley, California 94704

I;erecaith H. Thompson, D. Eng.Assistant CommissionerState Dent. of Health84 Holland AvenueAlbany, ew York 12208

John E. Vogt, DirectorDivision of Engineeringrichigan State De-..)t. of Healt,.Lansing, .ichigan 48914

SUGGESTIONS COIICERNING REGULATIONS

GOVERNING

ADJUSTABLE OUTPUT RATE CHEUICAL FEEDING EQUIPIiENT

It is strongly recommended that these Standards repre-senting a cross-section of opinion of workers in the fieldof environmental health be accepted and followed by enforce-mnt officials. However, their incorporation in detail intolocal sanitary codes does not appear to be necessary and islikely to be cumbersome.

In municipalities, counties, and health districts inwhich the adoption of legislation-by reference is consideredlegal, the following regulation should serve to implementthe use of the Standard for Adjustable Output Rate ChemicalFeeding riquipment.

ALL ADJUSTABLE OUTPUT RATE CHEMICAL FEEDING EQUIPMENTINSTALLED ON OR AFTTM IN PUBLIC OR PRI7ATESWIIWING POOT3 IN THIS JURISDICTION SHALL MEET THENATONAL SANITATION FOUNDATION STANDARDS FO R SUCHEQU'TYIENT.

or, if considered desirable, it will be simpler to adopt thefollowing or general regulation applying to all standards inthe swimming pool equipment field:

ALL SWIMMING POOL EQUIPMENT INSTALLED ON OR AFTERFOR USE IN P",33LIC OR PRIknTE SWIMMING POOLS

IN THE JURISDICTION SHALL MEET THE APPLICABLENATIONAL SANITATION FOUNDATION STANDARDS.

In. fact, the adoption of this broad regulation'willsave time as well as. advertising and printing costs, as nodoubt, many different standards will be adopted. Otherwise,each standard will require the adoption of a specific' re-gulation.

-.Wherever ,. the legality of .adopting legislation byrefe:Lence is riot recognized, delete. the portion of eitherof the above regulations after the word "S7IALL" and sub-stitute therefore the words "DE OP. A TYPE APPROVED BY THEHEALTH OFFICER." .The health officer may beguide4 bir theNational Sanitation Foundation Standards in his approval oftypeb.

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1.04 VARIATTWS IU DESIGN & OPERATION: A feedPr vary-ing in principle of design and/or operation fromthose set forth he may qualify under the pro-visions of this Standard provided appropriatetests and investigations inJicate that said feederproduces filter cycles, control, accurracy, per-formance, oneration and service at least equivalentto those produced by equipment complying with thisStandard. Such fcedsrs shall meet the require-ments for materials, finishes and construction inthis Stnadard.

SECTION 2. DEFINITIONS

2.00 APPROVED: Found acceptable for- he specific use asdetermined by the National Sanitatin'Foundationwhen related to the use of the nSf Seal of Approval.

2.01 TOXIC: Toxic shall mean adverse physiologicaleffect cn man.

2.02 PO.,ITIVE D7SPLACrNPNT: Mechanical displacementof a volume of fluid.

2.03 RESISTANT: Resistant shall mean the Properties ofa material to withstand chemical reaction andmechanical erosion.

2.04 OUTPUT RATE: Volume of solution or slurries inU.S. gallons, or weight of chemicals in ounces,delivered by the feeder into the medium per 24 hoursat pressures and suction lift in accordance withthe manufacturer's specifications. Output ratesmust be independent of the flow rate of the med-ium into which the chemicals are ,introduced.

2.05 FEED RATE INDICATOR: A mechanism calibrateddirectly or with reference to a chart to providepoints of reference to permit reproducible sett-ing of output rate.

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SECTION 3. MATERTALS

3.00 GENERAL: Any suitable material may be employedthat will meet the requirement of resistance,pressure, normal handling and shipping as out:-lined herein and that will not produce any toxiceffect or impart undesirable tastes, odors orcolor to the pool water.

3.001 No material used in the portion of thefeeder which is exposed to the chemicalbeing fed shall contribute toxic, obnox-ious or deleterious substances to suchchemicals. All plastic materials in con-tact with the chemical being fed shallmeet the applicable standards of theNational Sanitation Founeation.

3.01 CHEMICAL RESISTANCE: Feeders shall be resistantto at least the following solutions 12 1/2% sod-ium hypochlorite, rs calcium hypochlorite, 12%aluminum sulphate, 10% hydrochloric acid, 10%sodium hydroxide and 5% sodium carbonate. Equip-ment furnished for dispensing these and/or otherchemical solutions shall be designed and equippedto meet the resistance test specified in 3.011.

3.011 RESISTANCE TEST: Normally wetted partsof the feeder .shall be exposed to theabove solutions for a period of 100 daysat 730F. The feeder shall then be operatedfor a period of 24 hours under maximumuse conditions, and meet the standardspecified in Section 4.011.

3.02 ERROSION RESISTANCE:

Feeders offered for feeding slurries or otherabrasive materials ahall be resistant to 5% diatomaceousearth slurry. or 1% light weight expanded volcanic filtermedia when tested under conditions of Item 3.021.

Feeders designed for feeding dry chemicals shallbe resistant to the chemical in its dry form under thetest conditions of item .3.022.

3.021 alSISTANCE TEST - SLURRY FEEDERS:

The feeder shall feed at maximum outputsetting, an agitated suspension of 5% diatomaceousearth for a neriod of 2500 hours continuouslyagainst 20 psi back pressure. During this periodit shall feed in total no less than 80% of itsnet rated output. It must also feed no less. than

80% of its rated output during the last hour ofthis test. Upon disassembly, none of the normallywetted parts shall show errosion sufficient torender it inor:erative. :laintenance according tothe manufacturer's standard instructions, uiththe exception of parts replacement, shall becarried cut during the test period.

3.022 RESISTANCE TEST - DRY FEEDER:

The Feeder shall feed at maximum outputsettings, the dry chemical compound for which thefeeder is intended for a period of 2500 hourscontinuously into atmospheric pressure., Duringthis period, it shall feed in.total no less than80% of its net rated output. It must also feedno less than 80% of its rated output during the

last hour of this test. Upon disassembly, cnneof the parts of the feeder normally contacted by

the chemical being fed shall show errosion suff-icient to render it inoperative. Maintenanceaccording to the manufacturer's standard in-structions, with the exception of parts replacement,shall be carried out duri:Ig the test period.

SECTION 4, DESIGN AND CONSTRUCTION

4.00 GENERAL: The feeder shall be capable of beingeasily disassembled for cleaning and mainten-ance. The design and construction shall be suchas to minimize stoppage from chemicals intendedto be used therein or from foreign materialsthat may be contained in said chemicals. Thefeeder shall be designed so that when properlyinstalled it will prevent uncontrolled siphonageor discharge of chemicals directly into theswimming nool, the pool pi?ing system or thewater supply system.

4.01 FEEDER OUTPUT RATE: The feeder output rate shallbe adjustable in not less than 5 increments overthe full operating range. :leans for regulatingshall be conveniently located when mounted inaccordance with the manufacturer's instructions..

4.011 Feeders shall deliver chemicals in slurries,solutions, or in solid form into themedium at the output rate shown by thefeed rate inacator, plus or minus 10%of the setting, over a range of deliv-eries varying from 25% to 100% of ratedcapacity and where applicable over arange of delivery pressures of from 10uHg. vacuum to the maximum specified bythe manufacturer, but not to exceed50 psig.

4.02 PRESSURE REQUIREMENTS: Feeders shall pass ahydrostatic pressure test equal to 1 1/2 timesthe manufacturer's maximum pressure ratingapplied to all narts of the feeder which will besubject to discharge pressures when in operation.

4.03 LIFE TEST: Feeders shall be capable of operating3000 continuous hours at 80% of maximum pressureand output rate as specified by the manufacturer.Tests shall be conducted on three sample feeders.At least one samnle must complete 3000 hours a11 d

at least 8000 satisfactory operation hours mustbe accumulated among the three samles. All testscarried out in an ambient ror%11 at 100°F. Main-tenance according to the marmfacturer's standardinstrur:tions Lith e:xep;:ion cf part replacementshall be carried out during the test period.

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4.04 FEEDER HOUSING: The feeder housing and othercomponents shall have sufficient structuralstrength and durability to withstand normalstresses incindental to shipping, installationand operation.

4.05 SAFETY: Moving parts of the feeder must becovered where the possibility of injury to anoperator or attendant exists.

4.06 PROVISIONS FOR MOUNTING: The feeder shall bedesigned and constructed to facilitate securemounting.

4.07 MOTORS: All motors shall be constructed electric-ally and mechanically so that they will performsatisfactorily and safely under the conditionsof load and environment normally ecnonntered inswimming pool installations. They shall be ofthe continuous duty type and where NEIIA Standardsexist, shall conform thereto. Standard voltagesand cycles shall be used and full service factorsas provided for by NENA for each size motorshall be maintained. All motors shall be U L.approved.

4.08 SUCTION LIFT: After priming positive displace-ment pump type feeders shall perform satisfactorilywith a suction lift of four (4) feet of water.

4.09 CPERAmTON AND INSTALLATIONS IFSTRUCTTONS: Thereshall be furnished with each feeder, drawings,and parts lists for easy identification andordering of replacement parts. Also, includad shallbe a statement of manufacturer's guarantee.Instructions for porner installation, operationand maintenance shall be included. Instructionsshall include reference to flooded suctioninstallations and prevention of cross connections.

4.10 DATA PLATE:

4.101 TYPE AND LOCATION: Data plates shall be of.permanent'nature, so inscribed as to beeasily read art:2 unc:orz*-ocd, and securelyattached, cast or stamped into the feeder

a location readily accessible afternormal installation.

4.102 CONTENTS: Data plates shall contain thefollowing information:(1) Manuaetuler's or prime suppliers'

name and address

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16111501111MMIMINIMMIN*1111410141101600014.1011001"110MILT

(2) Feeder rodel number and/or serialnumber

(3) 1aximuni operating pressure rating(psig)

(4) Maximum output rating (volume ofliquid or weight or volume of solidchemicals per 24 hour day)