IAPMO IS 20-2010 California Plumbing Code/Appendices...This standard shall govern the installation of CPVC piping (IPS pipe and SDR-11 tubing) in potable hot and cold water distributing

1.0 Scope.1.1 This standard shall govern the installation of

CPVC piping (IPS pipe and SDR-11 tubing) inpotable hot and cold water distributing systemswithin buildings. (For allowable locations andpressure, see Sections 2.9.2 and 2.9.4) Installa-tion, material and inspection shall comply withthe current edition of the UPC [UPC]TM,published by the International Association ofPlumbing and Mechanical Officials, and shallalso comply with this standard.

Note: The following sections of the Uniform PlumbingCode apply to CPVC IPS piping and SDR-11 tubing.

103.5 Inspections301.1 Minimum Standards309.0 Workmanship310.0 Prohibited Fittings and Practices312.0 Protection of Piping, Materials,

and Structures313.0 Hangers and SupportsChapter 6 Water Supply and Distribution605.17.2 Plastic Pipe to Other Materials

Chapter 2* Definitions.205.0 CPVC Chlorinated Poly (Vinyl

Chloride)Pipe or tubing - “Pipe” or“Piping” includes both pipe andpiping, unless specified as “IPSPipe” or “tubing”.

Table 1401.1 Referenced StandardsASTM D 2846 Chlorinated Poly (Vinyl Chloride)

(CPVC) Plastic Hot and Cold WaterDistribution System

ASTM F 441 Chlorinated Poly (Vinyl Chloride)(CPVC) Plastic Pipe, Schedules 40 and80

ASTM F 438 Socket Type Chlorinated Poly (VinylChloride) (CPVC) Plastic Pipe FittingsSchedule 40

ASTM F 439 Socket Type Chlorinated Poly (VinylChloride) (CPVC) Plastic Pipe FittingsSchedule 80

ASTM F 493 Solvent Cements for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipeand Fittings

Abbreviations.ASTM American Society for Testing and MaterialsIAPMO International Association of Plumbing and

Mechanical OfficialsUPC Uniform Plumbing Code published by

IAPMO

1.2 Special Requirements for CPVC Installationwithin Residential Structures. [HCD 1] Inaddition to the other requirements in the Cali-fornia Plumbing Code and this Appendix for theinstallation of CPVC Solvent Cemented Hot andCold Water Distributions Systems, all installa-tions of CPVC pipe within residential structuresshall meet the following:

1.2.1 Flushing Procedures. All installations of CPVCpipe within residential structures shall beflushed twice over a period of at least one (1)week. The pipe system shall be first flushed forat least 10 minutes and then filled and allowedto stand for no less than 1 week, after which allthe branches of the pipe system must be flushedlong enough to fully empty the containedvolume. At the time of the fill, each fixture shallhave a removable tag applied stating:“This new plumbing system was first filled on(date) by (name). The California Department ofHousing and Community Development requiresthat the system be flushed after standing at leastone week after the fill date specified above. Ifthe system is used earlier than one week afterthe fill date, the water must be allowed to runfor at least two minutes prior to use for humanconsumption. This tag may not be removed priorto flushing, except by the homeowner.”

1.2.2 Worker Safety Measures. Mechanical ventila-tion sufficient to maintain exposures below therelevant exposure limits established by stateregulation shall be provided in enclosed spaces.This ventilation shall be directed at thebreathing zone of the worker installing the pipe.Where mechanical ventilation is not practical,respirators, suitable for organic vapors, shall beused. For the purpose of this subdivision, anenclosed space is defined as:

4852013 CALIFORNIA PLUMBING CODE

INSTALLATION STANDARDFOR CPVC SOLVENT CEMENTED HOT AND COLD WATER DISTRIBUTION SYSTEMS

IAPMO IS 20-2010

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(a) A space less than 100 square feet of floor area under aceiling with a height of 10 feet or less, and which doesnot have openings (consisting of doors, windows, orunfinished walls) on at least two sides;

(b) Crawl spaces having a height of less than three feet;(c) Enclosed attics that have a roof and ceiling; or(d) Trenches having a depth greater than 24 inches.

Installers of CPVC pipe within residential structures shalluse non-latex thin gauge (4 millimeters) nitrile gloves, orother gloves providing an equivalent or better degree ofprotection during the installation of the CPVC plumbingsystem. Gloves shall be provided to all workers by thecontractor, or plumbing subcontractor, and shall bereplaced upon contamination by cements.

2.0 Product Requirements.2.1 Minimum Standards.2.1.1 Materials. Materials shall comply with the

following:

Materials ASTMStandard

Raw Material-CPVC 23447 D 1784IPS PipeSch. 40 (1⁄2 in., 3⁄4 in. and 1 in.) F 441(12.7 mm, 19.1 mm, and 25.4 mm)Sch. 80 (1⁄2 in. – 10 in.) F 441(12.7 mm – 51 mm)TubingSDR 11 (1⁄2 in. thru 2 in.) D 2846(12.7 mm – 51mm)FittingsSch. 40 (1⁄2 in., 3⁄4 in. & 1 in.) F 438(12.7 mm, 19.1 mm, and 25.4 mm)Sch. 80 (1⁄2 in. – 10 in.) F 439(12.7 mm – 51mm)Tube Fittings (1⁄2 in. – 2 in.) D 2846(12.7 mm – 51 mm)

2.1.2 Primer. Listed primers shall be used that arecompatible with the type of listed CPVCcement and pipe used. The primer shall be atrue solvent for CPVC, containing no slowdrying ingredient. Cleaners shall not beallowed to be used as a substitute or equiva-lent for a listed primer.Exception: Listed solvent cements that do notrequire the use of primer shall be permittedfor use with CPVC pipe and fittings, manu-factured in accordance with ASTM D 2846, 1⁄2inch through 2 inches in diameter.Note: Manufacturer shall provide test data froman independent testing laboratory acceptable tothe Administrative Authority that their CPVCpipe, together with recommended fittings has aShort Term Working Pressure (STWP) andTemperature Rating of 150 psi (1030 kPa) at210°F (99°C) for 48 hours or more.

2.1.3 Material. Pipe and fittings are plastic and areusually light gray for IPS pipe and fittings,and tan for SDR 11 tubing and fittings.

2.2 Markings.2.2.1 Pipe and Tubing. IPS pipe and tubing mark-

ings shall be in accordance with F 441 or D2846. [UPC 301.1.1]

2.2.2 Fittings. Fitting markings shall be in accor-dance with F 438 or F 439 or D 2846. [UPC301.1.1]Note: Standard number may be omitted onsmaller fittings when marked thus with fourraised dots.

2.2.3 Solvent Cement. Container labeling of CPVCsolvent cement shall be in accordance with F493.

2.2.3.1 Color. Solvent cements requiring the use of aprimer shall be colored orange or gray.Solvent cements that do not require the use ofa primer shall be colored yellow.

2.2.4 Primer. Primer container markings shall be inaccordance with F 656.

2.2.4.1 Color. Primer shall be colored so as to makeits use obvious on a finished joint, but shallnot be colored orange, yellow or gray.

2.2.5 Position of Markings. Identification mark-ings shall be visible for inspection withoutmoving materials.

2.2.6 Alignment. Piping and fittings shall bealigned properly without strain.

2.3 Protection of Materials.2.3.1 Abrasion. Pipe or tubing passing through

drilled or notched metal studs or joists orhollow shell masonry walls shall be protectedfrom abrasion due to thermal expansion andcontraction by elastomeric or plastic sleevesor grommets or other approved means.

486 2013 CALIFORNIA PLUMBING CODE

IS 20

Suggested locationof marking code

Method of marking(5x Size) (4 Dots)

Alternative DotProfiles 10x Size

R

3/16"

120o 90o

0.015" - 0.040"(0.4 mm - 1.0 mm)Dia. dots (4)equally spaced1/4" (6.4 mm) Dia.

(4.8 mm)

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Straight runs may have protection atmaximum 3 feet (915 mm) intervals. [UPC312.0]

2.3.2 Puncture. Steel plate protection shall beinstalled when required by the AdministrativeAuthority or section 312.9 of the UniformPlumbing Code.

2.3.3 Storage and Handling. Pipe shall be stored in away to protect it from mechanical damage (slit-ting, puncturing, etc.). It shall be stored undercover to keep it clean and avoid long term expo-sure to sunlight. Exposure to sunlight duringnormal construction periods is not harmful.CPVC solvent cements should be stored in acool place except when actually in use on thejob site. The solvent cement manufacturer’sspecific storage instruction should be followed.

2.3.4 Freezing. In areas where the system must bedrained to protect it from freezing, horizontallines shall be graded to drain.

2.3.5 Overheating:(a) Tubing shall not be positioned or closer to

devices that generate heat such that thetemperature around the CPVC tubing isgreater than 180°F.

(b) Do not apply direct flame onto CPVC.2.3.6 Chemical Compatibility: Pipe and Fitting

materials can be damaged by contact withchemicals found in some construction prod-ucts. The chemical compatibility of such prod-ucts with the particular pipe of fitting materialmust be verified prior to use.Otherwise, contact between the constructionproduct and the pipe of fitting must be avoided.

2.4 Thermal Expansion.2.4.1 General. Allowance for thermal expansion

and contraction shall be provided by approvedmeans. Thermal Expansion is mainly aconcern on hot water lines. In vertical pipingloops are not required when the temperaturechange (ΔT) is 120 °F or less. Allowance shallbe based on an expansion rate formula listedbelow (See Table 1) or per the manufacturer’sinstallation instructions.£ = [ 3ED (ΔL) / 2S ] 1⁄2ΔL = Lp x C x ΔTΔL = change in length of pipe in inchesLp = length of pipe in inchesC = coefficient of thermal expansion forCPVC, 3.8 X 10-5 in/in/°FΔT = change in temperature in °FNote: Expansion rate is independent of thesize of the pipe.

2.4.2 Offsets and Loops. Thermal expansion maybe provided for by use of expansion loops,

offsets, or changes of direction. From Table 1determine the length “L” that is required. Notethat “L” is based on length of run, diameter ofpipe, and maximum temperature of water.

2.5 Clearance. Adequate clearance shall beprovided between piping and structure (suchas bored holes and sleeves) to allow for freelongitudinal movement.

2.6 Hangers and Supports.2.6.1 Vertical Piping. Vertical piping shall be

supported at each floor or as specified by thedesign engineer to allow forexpansion/contraction. Piping shall have amid-story guide. [UPC 313.0]

2.6.2 Horizontal Piping. Unless an engineereddesign is provided and approved by theAdministrative Authority, the following provi-sions shall apply. Horizontal piping 1 inch(25.4 mm) or smaller shall be supported atmaximum 3 foot (914 mm) intervals or permanufacturer’s installation instructions. Piping1-1⁄4 inch (32 mm) or larger shall be supportedat maximum 4 foot (1219 mm) intervals or permanufacturers installation instructions.

2.6.3 Hangers and Anchors. Piping shall not beanchored rigidly to a support, but rathersecured with smooth hangers or straps thatprovide for a degree of movement and thatprevent damage to the pipe. Hangers or strapswith sharp or abrasive edges shall not be used.Hangers that pinch the piping shall not be used.

2.7 Solvent Cement Joints.2.7.1 Safety Requirements and Precautions1.

(a) General. Solvents contained in CPVCplastic pipe cements are classified asairborne contaminants and flammable andcombustible liquids. Precautions listed inthis appendix should be followed to avoidinjury to personnel and the hazard of fire.

(b) Prolonged breathing of solvent vaporsshould be avoided. When pipe and fittingsare being joined in partially enclosedareas, a ventilating device should be usedin such a manner to minimize the entry ofvapors into the breathing areas.

(c) Solvent cements should be kept awayfrom all sources of ignition, heat, sparksand open flame.

(d) Containers for solvent cements should bekept tightly closed except when thecement is being used.

(e) All rags and other materials used formopping up spills should be kept in asafety waste receptacle which should beemptied daily.

(f) Most of the solvents used in CPVC pipecements can be considered eye irritants


IS 20

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IS 20

and contact with the eye should beavoided for it may cause eye injury.Proper eye protection and the use ofchemical goggles or face shields areadvisable where the possibility ofsplashing exists in handling solventcements. In case of eye contact, flush withplenty of water for 15 minutes and call aphysician immediately.

(g) Repeated contact with the skin should beavoided. Proper gloves impervious to andunaffected by the solvents should be wornwhen frequent contact with the skin islikely. Application of the solvents orsolvent cements with rags and bare handsis not recommended. Brushes and othersuitable applicators can be used effec-tively for applying the solvent cement,thus avoiding skin contact. In the event ofexcessive contact, remove contaminatedclothing and wash skin with soap andwater.

2.7.2 Selection. Follow the manufacturer’s recom-mendations for type of solvent cements forsuch conditions as temperatures over 100°F(38°C), or humidity over 60%.

2.7.3 Handling (to maintain effectiveness).Package solvent cement in containers nolarger than 1 quart (1 liter). Keep solventcement can closed and in the shade when notin use. Keep applicator submerged in solventcement between applications. Discard solventcement when it thickens appreciably or gels.Solvent cement shall not be thinned.

2.7.4 Primer. A listed primer in compliance withASTM F 656 shall be used with CPVC solventcements that require the use of a primer.CPVC solvent cements that do not require theuse of a primer are permitted for joints up to 2inches in size.

2.7.5 Size of Applicator. Applicator should beabout one half the pipe diameter. Do not usesmall applicator on large pipes.

2.7.6 Procedures.Step 1 Cut pipe square with, mechanical

cutoff saw or tube cutterdesigned for plastic.

Step 2 Ream and chamfer pipe (to elim-inate sharp edges, beads and allburrs).

Step 3 Clean all dirt, moisture andgrease from pipe and fittingsocket. Use a clean, dry rag.

Step 4 Check dry fit of pipe in fittings.Pipe should enter fitting socket1⁄4 to 3⁄4 of socket depth. On largersizes of Sch. 80 fittings, a looserfit may be expected. This is anormal condition, and requirescare to apply an adequateamount of cement.

Step 5 Apply CPVC primer, if required(see Section 2.7.4) to inside offitting socket. Take care to avoidpuddling.

Step 6 Apply CPVC primer, if requiredto outside surface of pipe todepth of fitting socket.

Step 7 When using solvent cementsrequiring a primer wait untilprimer surface is tacky. DO NOTattempt to soften (dissolve) thesurface as is required for PVC.

Step 8 Apply a liberal coat of CPVCsolvent cement to the outsidesurface of the pipe to the depthof the fitting socket.

Step 9 Apply a light coat of CPVCsolvent cement to inside of fittingsocket. Apply a second liberalcoat of cement to the pipe end.Take particular care in cementinglarger sizes of Sch. 80 fittings. Besure all surfaces are coated.

Step 10 While both the inside socketsurface and the outside surfaceof the pipe are WET with solventcement, forcefully bottom thepipe in the socket, giving thepipe a quarter turn whileinserting, if possible.

Step 11 Hold the joint together for 10 to30 seconds depending on pipesize to assure that the piperemains bottomed against thepipe stop.

Step 12 Do not disturb the joint for atleast 30 minutes.

Note: The joint is weak until the cement isdry. If the joint is adjusted after it is set, thejoint will be ruined. See Table 2 for recom-mended set time.Step 13 Wipe excess cement from the

pipe. A properly made joint willshow a bead of cement around itsentire perimeter. Any gaps mayindicate insufficient cement.

1 Appendix X1. Safety Requirements And Precautions, from ASTM D 2564-88 Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings isreprinted with permission from the American Society for Testing and Materials, 1916 Race St., Philadelphia, PA 19103, copyright.

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Step 14 The system shall not be pressur-ized until the joints have cured(set) at least as long as recom-mended by the manufacturer. Ifthe manufacturer’s recommen-dation is not available, the curetimes outlined in Table 2 arerequired.

2.7.7 Prohibited Joints. Piping shall not bethreaded. Female screwed fittings, withCPVC threads, shall be prohibited. Jointsmade with adhesives shall be prohibited.

2.7.8 Threaded Joints. When threads are required,molded male adapters shall be used.

2.7.9 Location. CPVC threaded joints shall beaccessible.

2.7.10 Lubricants. Only thread tape or thread lubri-cant approved specifically for use with CPVCshall be used. Conventional pipe threadcompounds, putty, linseed oil based products,and unknown mixtures are prohibited.

2.7.11 Tightening. Joints shall be tightened approxi-mately 1-1⁄2 turns past hand tight.CAUTION: Hand tight refers to the numberof threads to reach hand tight with metal pipe.Small sizes of CPVC can be bottomed byhand pressure alone. DO NOT overtighten.

2.7.12 Special Joints.2.7.12.1 Transition Joints. Transitions from CPVC

tubing to metal piping and valves shall bemade only with listed transition fittings suit-able for that purpose. When required, the tran-sition fittings shall be designed in such amanner that it can be anchored to a buildingmember to prevent rotation. [UPC 605.17.2]

2.7.12.2 Soldering. Soldered metal joints shall not bemade closer than 18 inches (457 mm) to anyalready installed plastic to metal adapter inthe same water line.

2.7.12.3 Hose Bibbs. Hose bibbs shall be connectedonly to metal system components which areadequately anchored to the building structure.The CPVC plastic system shall terminate inwall.

2.7.12.4 Mechanical Joint. Mechanical joints shall beinstalled in accordance with the manufac-turer’s instructions.

2.8 Pressure Relief Valves.2.8.1 CPVC Piping. CPVC piping used for temper-

ature and/or pressure relief valve drain linesshall be graded to the outlet end and shall besupported at 3 foot (914 mm) intervals bothvertically and horizontally. CPVC can beconnected directly to temperature and or pres-sure relief valves.

2.9 Installation, Inspection and Testing.2.9.1 Finish Nipples. Finish nipples shall be

connected to drop ear elbows or other fittingslisted for preventing rotation. Finish nipplesshall not be CPVC but CPVC stub outs forfixture connections shall be permitted. [UPC609.0]

2.9.2 Location. CPVC tubing shall not be installedso as to be subjected to direct sunlight afterinstallation, and shall not be installed on thesurface of the building unless it is protectedby paint or a protective covering.

2.9.3 Water Heaters. There shall be a minimum ofsix (6) inches (152 mm) of metallic pipingbetween a gas water heater connection andCPVC tubing. CPVC tubing may be installeddownstream of instantaneous (coil or immer-sion) water heaters provided that the waterheater temperature controls are maintained formaximum temperature of 180° F.

2.9.4 Under Slab. Pipe shall be installed in trenchwith uniform support. Trenches shall be back-filled to a depth of six (6) inches (152 mm)with clean earth, sand or other approved mate-rial which shall not contain sharp rocks, boul-ders, cinder fill or other materials whichwould damage or break the piping. Pipe shallbe stubbed up and all ends shall be capped.The system shall be filled with water and allair shall be bled off. The system shall be pres-sure tested under a water pressure which isnot less than the working pressure which isnot less than the working pressure underwhich it is to be used for a minimum of two(2) hours. All leaks shall be corrected. Foampipe insulation shall be installed on all stubups to prevent damage during concrete pourand finishing.

2.9.5 Identification. A permanent sign with thelegible words “This building has non-metallicinterior water piping” shall be fastened on orinside the main electric service panel.

2.9.6 Position of Marking. When installed, pipingand fittings shall be positioned so that whenpractical, identifying markings shall bereadily visible for inspection.

2.9.7 Testing. Air testing is prohibited.2.10 Sizing.2.10.1 Method. Piping shall be sized in accordance

with UPC Section 610.0. When Appendix Ais applicable, use Chart 1, 2, or 3 as appro-priate. Flow velocities shall be limited to amaximum of 8 feet per second (2.4 m/s). SeeTable 3. [UPC 610.0]


IS 20

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IS 20

CPVC Pipe SDR 11 (ASTM D 2846)Calculated Loop (offset) Lengths with ΔT of approx. 100°F

Nominal Pipe SizeLength of Run in Feet

20 40 60 80 100Loop Length (£) in inches

1⁄2” 18 26 32 36 413⁄4” 22 30 37 43 481” 24 35 42 49 55

11⁄4” 27 38 47 54 6011⁄2” 29 42 51 59 662” 34 47 58 67 75

Assume Modulus & Stress at 160°F

£ = √3ED(ΔL)/2SWhere £ = loop length in inches

E = modulus of elasticity at maximum temperature, psiD = outside diameter of pipe, inchesΔL = change in length due to change in temperature, inchesS = working stress at maximum temperature, psi

CPVC Pipe Schedule 80 (ASTM F 441)Calculated Loop (offset) Lengths with ΔT of approx. 100°F


40 60 80 100Loop Length (£) in inches

21⁄2” 55 68 78 873” 61 75 86 964” 69 85 98 1096” 84 103 119 1338” 96 117 135 15110” 107 131 151 169


CPVC Pipe SDR 11 (ASTM D 2846)Calculated Loop (offset) Lengths with ΔT of approx. 80°F


20 40 60 80 100Loop Length (£) in inches

1⁄2” 16 23 28 33 363⁄4” 19 27 33 39 431” 22 31 38 44 49

11⁄4” 24 34 42 48 5411⁄2” 26 37 45 53 592” 30 42 52 60 67

TABLE 1

CPVC Pipe Schedule 80 (ASTM F 441)Calculated Loop (offset) Lengths with ΔT of approx. 80°F


40 60 80 100Loop Length (£) in inches

21⁄2” 49 61 70 783” 55 67 77 864” 62 76 87 986” 75 92 106 1198” 86 105 121 13510” 96 117 135 151



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Where£ = loop length in inchesE = modulus of elasticity at maximum temperature, psiD = outside diameter of pipe, inchesΔL = change in length due to change in temperature, inchesS = working stress at maximum temperature, psi

£ = [ 3ED (ΔL) / 2S ] ½

ΔL = Lp x C x ΔTΔL = change in length of pipe in inchesLp = length of pipe in inchesC = coefficient of thermal expansion for CPVC, 3.8 X 10-5 in/in/°FΔT = change in temperature in °F

THERMAL EXPANSION (inches)LENGTH OFRUN (feet) ΔT 80°F ΔT 100°F

20 0.73 0.9140 1.46 1.8260 2.19 2.7480 2.92 3.65100 3.65 4.56


IS 20

Loop Offset Change inDirection

L(38")

L/5 L/5

L/5

2L/5(15 1/4")

L/4

L/2(19")

SupportGuides

L/4

60' (18288 mm) Run

(965 mm)(483 mm)(387 mm)

Example: Pipe Size – 1⁄2 inch (12.7 mm) Length of Run – 60 feet (18288 mm): (38”) (965 mm) (from table).

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IS 20

JOINT CURE SCHEDULE

TEMPERATURE RANGE OFPIPE AND FITTINGS DURINGASSEMBLY AND CURE

MINIMUM JOINTSET TIME, hrs(STEP 12)

MINIMUM CURE TIME BEFORE TESTING, hrs (STEP 14) MINIMUM TIMEBEFORE PUTTINGSYSTEM INTOSERVICE AT

80 psi/160°F (71°C), hrs

PIPE SIZE1⁄2 - 1 in.

(12.7 - 25.4 mm)11⁄4 - 2 in.

(32 - 51 mm)F° C°60-100 16-38 1⁄2 1 2 2440-60 4-16 1 2 4 48

TABLE 2

TABLE 38 FEET PER SECOND

PIPESIZE

PIPE Sch. 40 PIPE Sch. 80 TUBING SDR 11

GPMFt.* FV**

GPMFt.* FV**

GPMFt.* FV**

FU FU FU FU FU FU1⁄2 8 9 –– 6 7 –– 5 6 ––3⁄4 13 19 –– 11 15 –– 10 13 ––1 22 33 –– 18 26 –– 17 24 ––

11⁄4 37 74 5 32 55 15 25 42 8

11⁄2 51 129 50 44 104 36 35 66 202 81 295 170 74 245 124 59 170 73

TABLE 3 (Metric)2.4 METERS PER SECOND

PIPESIZE

PIPE Sch. 40 PIPE Sch. 80 TUBING SDR 11

L/minFt.* FV**

L/minFt.* FV**

L/minFt.* FV**

FU FU FU FU FU FU

12.7 30.3 9 –– 22.7 7 –– 18.9 6 ––19.7 49.2 19 –– 14.6 15 –– 37.9 13 ––25.4 83.3 33 –– 68.1 26 –– 64.3 24 ––32 140.0 74 5 121.1 55 15 94.3 42 838 193.0 129 50 166.5 104 36 132.5 66 2051 306.0 295 170 280.1 245 124 223.3 170 73

* Flush Tank Fixture Units** Flush Valve Fixture Units

* Flush Tank Fixture Units** Flush Valve Fixture Units

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IS 20

Plastic SDR IITubing

Very SmoothC = 150

Friction Loss in Lbs. per Sq. In. per 100 Ft. Run

Flow in Gallons per Minute



0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

5

2

8

7

6

4

5

3

1

1-1/2

1-1/4

1

3/4

1/2

Velocity Ft. Per Second

2 Diameter Inches

CHART 1

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IS 20

Sched. 40 IPSPlastic PipeVery Smooth

C = 150





0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

2

8

5

31-1/2

Diameter Inches

1-1/4

3/4

1/2

1

4

7

2

1

6


CHART 2

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IS 20

Sched. 80 IPSPlastic PipeVery Smooth

C = 150





0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.2

0.3

0.40.50.60.70.81.0

2

3

4567

108

15

20

30

4050607080

100

150200

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

0.1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 10 20 30 40 50 60 80 100

8

5

3

1-1/2

1-1/4

3/4

1/2

4

7

2

1

6


1

Diameter Inches

2

CHART 3

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IS 20

Appendix A

The following formula should be used for Schedule 80 IPS CPVC sizes 2 ½” through 10”:

Head loss formula: HL = 0.2083 (100/C) 1.852 x FR1.852 / dI

4.8655

Where HL = frictional head loss (feet of water per 100 feet)C = Hazen-Williams factor (150 for CPVC)FR = flow rate (gal/min)dI_= inside diameter of pipe (inches)

Note: head loss in feet of water per 100 feet can be multiplied by 0.4335 to obtain pressure drop in psi

Velocity formula: VW = 0.4085 FR / dI2

Where VW = velocity of water (feet per second)

ADOPTED: 1982REVISED: 1984, 1985, 1989, 1990, 1991, 1992, 1993, 1995, 1996, 1997, 2000, 2003, 2005, 2006, 2010

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Documents

IAPMO IS 20-2010 California Plumbing Code/Appendices...This standard shall govern the installation of CPVC piping (IPS pipe and SDR-11 tubing) in potable hot and cold water distributing