cpvc technical manual€¦ · raksha cpvc pipes 1/2” to 2” sdr 11 & sdr 13.5 meets...

HOT & COLD

WATER APPLICATION

IDEAL FOR

CPVC TECHNICAL MANUAL

Certified Company

w w w . s h a n d g r o u p . c o m

Approved RM

NSF

Jeevan Bhar Ki Suraksha

CFTRI

France

SHAND GROUP THE LEGACY

Established during the year 1977 by Group Chairman Mr. Shantilal Shand. He is a humble entrepreneur who has been all along a trendsetter and visionary in the PVC Pipe Industry. Under his vision & philosophy SHAND GROUP with core brand name “RAKSHA” has grown leaps & bounds in the subsequent years.The group owes its growth to the remarkable leadership & business acumen of the chairman, who has been a fastidious achiever and is involved in the company’s strategic planning. He is fully dedicated to accomplish the Group’s long-term mission. He is mentor to the group and leads by example. Today, he is involved in many philanthropic activities and is associated with number of social welfare organizations across the country.

In the process to take the organization to newer horizons, the chairman is very well supported by the core team of ambitious, enthusiastic & visionary directors Mr. Sanjay Shand and Mr. Ajay Shand. They have been leading dedicated team of professionals who work relentlessly to achieve the milestones in the fast growing organization.

Based at Bangalore, southern part of India, the organization has always been pioneer in bringing the right technology with upgradations to cater to constantly evolving global scenario in terms of applications and requirements of PVC Pipes. The vision of the management with focus and commitment towards “Quality at its best” have been the building blocks of the organization

01 RAKSHA - JEEVAN BHAR KI SURAKSHA

Strength

The Group consists of six manufacturing units located at Bangalore, Daman and Roorkee. It has a vast distribution network spread throughout the country which ensures quick availability of the products to the customers. Together with manufacturing experience

Manufacturing Plant, Roorkee

Corporate Office, Bangalore

Vice President of India with the Chairman

Director Marketing & Business Manager - KEM ONE - France with our Director

02

RAKSHA, DUROFLEX, AaSAaN FIT, DUROLON, DORAFLEX, SONAFLEX, SANJAYFLEX, SUPER SANFLEX,

SUPERLON & DAYLON.

The company manufactures and stocks premium quality products under the popular brand names of:

Licence of Arkema - Europe

www.shandg r oup . c om

of more than three decades, the latest technology and state-of-art machinery, Raksha product’s ensures the highest standards of consistent quality.

All the products of the Group undergo stringent quality control and testing parameters. The R&D department constantly endeavors to develop new products and innovate continuously. The improvement in the products with better features and characteristics enable the group to compete at a global stage.

The customer care department ensures quick response to customers and provide significant resources for better services from experienced team of professionals.

An ISO Company

Our organization is ISO 9001 : 2008 certified and many of our products are approved by Bureau of Indian Standards (BIS). The hallmark of excellence and passion to rise & serve, excel & grow, perform & prove has placed the organisation on the path of tremendous success & growth.

Raksha CPVC (Chlorinated Polyvinyl Chloride) is a product of Shand Group. Raksha high-performance piping system is amongst the most widely used CPVC plumbing system in the market. Made by the industry-leader in CPVC, with decades of manufacturing expertise, Raksha pipes & fittings boast of withstanding even the toughest deployment and years of field use. Over that time, millions of feet of pipes and fittings have been successfully installed globally in residential and commercial applications.

With production facilities and sales offices around the globe, Raksha brings together best-in-class expertise and an unrivalled passion for customer service, while its portfolio of items represents one of the most extensive and diverse product ranges throughout India.

Quality Products

Our extensive product offering provide a consistent and constant supply of superior quality resin to our pipe plants, and our gasket and additive vendors must comply to rigid specifications so that our products remain top of the line. We strictly adhere to all government and market standards to ensure that our customers get exactly what they need.

Performance Benefits

• Anti-corrosion• Greater resistance to impact fracture and high temperature deflection• Strong solvent cement welded joints• Lower condensation• Fast and easy installation• Lower labor costs• Suitable for use up to 93°C• Lowest bacterial growth• No corrosion, leakage, scaling, pitting• Low thermal expansion• Fire retardant• Made from NSF approved raw material• Low thermal conductivity

Ideal for use in Hot and Cold conditions

• Residential Apartments• Villas and Individual Homes• Office Complexes• Commercial Buildings• Hotels• Hospitals


APPLICATIONS

Raksha CPVC pipes 1/2” to 2” SDR 11 & SDR 13.5 meets requirement of IS 15778 and fittings in SDR 11 as per ASTM –D 2846 in CTS (Copper tube size). Raksha CPVC pipes are classified by pressure rating i.e. working pressure at 27°C and 82°C. Raksha CPVC SDR 11 and SDR 13.5 pipes are made from identical composition of CPVC compounds and have the same physical properties. SDR stands for Standard Dimension Ratio to wall thickness. The above pipes are recommended for water temperatures ranging from +1°C to +90°C. The recommended maximum safe working stress for these pipes is 8.6 MPa at 27°C. At higher temperature up to 90°C, the strength of the pipe reduces and working pressure shall be modified in accordance with the following table.

Ratio Working Pressure at (In kg/cm2)

27°C 82°C

SDR 11 27.8 6.8

SDR 13.5 21.8 5.5

• BurstPressureofthesepipesaremorethanthreetimestheabovepressureratings

• ISspecification(IS-15778)forCPVCincludesbothSDR11andSDR13.5pipes

IndustrialCPVCpipe ismanufacturedbyextrusion in sizes from2½” to4” diameter toSCH40,SCH80,and SDRdimensions.CPVCpipeforplumbingsystemismanufacturedbyextrusioninsizes1/2”to2”coppertubesize(CTS)dimension.TheCTSplumbingproductsaremadetocoppertubeoutsidediameterdimension,inaccordancewithASTM-D-2846specification,andhaveanSDR11wallthickness.ThepressureratingsoftheCTSSDR11systemsare400psi(poundspersquareinch)at73°Fand100°F.CPVCplumbingpipeiscoldinbothstraightlengthand(insmalldiameters)coils.

Test Method for Quality Control

Test Procedure for the Pipe:

1. Dimensional Tests: To ensure that all dimensions confirm to appropriate standards 2. Flattening Test: Sample pipes are compressed to check that despite compression, pipes do not crack 3. Burst Pressure Test: Ensures maximum internal pressure to be over three times normal pressure rating for the pipe 4. Drop Impart Test: Ensures weights are dropped on to the pipe, without cracks or failures

5. Heat Reversion Test: Ensures residual stresses left in pipe after the pipe is produced

Test Procedure for the Fittings:

1. Dimensional Test: Ensures correctness of dimensions for wall thickness, socket diameters and socket depths as per relevant standards

2. Burst Pressure Test: Ensures maximum burst pressure of fittings must be over three times the normal pressure rating

Other Tests

1. Tensile Strength2. Opacity3. VST4. Density5. Effect on water6. Verfication of the malfunction temperature7. Internal Hydrostatic Pressure Test a) Acceptance b) Type Test

04

LABORATORY


Why only RAKSHA CPVC Pipes & Fittings?

Properties CPVC

Tensile Strength High.55 MPa

Flow Rate High due to higher ID

Jointing Easy cold fusion as done by solvent joint

Scale Formation/ Calcination No scale formation, pitting and corrosion

Fire Retardance LOI = 60%. Self extinguishes

Bacterial Growth Lowest. Less than 5000Kbe/cm

Thermal Conductivity Low. 0.14W/MK Less energy loss

Thermal ExpansionLow. 0.7x10 mm/mk less supports, less snaking.

Effect of UVDehydrochlorination reaction.Temp andpressure bearing capacity remains unaffected

Oxygen Permeation< 1 cm3/m day atmosphere (at 70°C) Nocorrosion risk

Resistance to water disinfectant (Chlorine)

Not affected by chlorine in water supply orby pH of Water

ReliabilityBeing used in more than 50 Countries for thelast 46 years

Repair Extremely easy

Applications of Raksha CPVC PipesRaksha CPVC piping, which is suitable for hot and cold water distribution, has a 400 psi pressure rating at room temperature, and a 100 psi pressure rating at 180° F. The materials used in Raksha CPVC pipes are resistant to many everyday household chemicals. Since CPVC materials do not support combustion, they cannot burn without an external fuel source. This property makes CPVC pipe an attractive alternative to steel and copper pipe for fire sprinkler application. CPVC fire sprinkler piping systems are approved for light hazard application and for use in single and multifamily dwellings. Installation shall be in accordance with the NFPA section 13, 13D and 13R.

Galvanised steel pipes are outdated & are not used in most countries for plumbing application because of its inherent problems of leaking, rusting, scaling, pitting, leaching and corrosion.

WHY ONLY RAKSHA?

Advantages

Fire Retardant Bacteria proof Leak proof Corrosion & Deposition Free

Strong Quality


Sl NoN.B OD Average ID Average Wall Thickness

Standard Length

Inch mm Inch mm Inch mm Inch mm

1 ½” 15 0.625 15.90 0.520 13.10 0.055 1.40 3/5mtr

2 ¾” 20 0.875 22.20 0.750 18.90 0.065 1.65 3/5mtr

3 1” 25 1.125 28.60 0.960 24.36 0.083 2.12 3/5mtr

4 1¼” 32 1.375 34.90 1.170 29.72 0.102 2.59 3/5mtr

5 1½” 40 1.625 41.30 1.390 35.18 0.120 3.06 3/5mtr

6 2” 50 2.215 54.00 1.810 46.00 0.157 4.00 3/5mtr

Sl NoN.B OD Average ID Average Wall Thickness

Standard Length

Inch mm Inch mm Inch mm Inch mm

1 ½” 15 0.625 15.90 0.489 12.44 0.068 1.73 3/5mtr

2 ¾” 20 0.875 22.20 0.715 18.14 0.080 2.03 3/5mtr

3 1” 25 1.125 28.60 0.921 23.42 0.102 2.59 3/5mtr

4 1¼” 32 1.375 34.90 1.125 28.54 0.125 3.18 3/5mtr

5 1½” 40 1.625 41.30 1.329 33.78 0.148 3.76 3/5mtr

6 2” 50 2.215 54.00 1.739 44.20 0.193 4.90 3/5mtr

Sl NoN.B Pressure Rating

Inch mm73.4° F

Psi23° C

kg/cm2

180° F Psi

82° Ckg/cm2

1 ½” 15 320 22.5 80 5.6

2 ¾” 20 320 22.5 80 5.6

3 1” 25 320 22.5 80 5.6

4 1¼” 32 320 22.5 80 5.6

5 1½” 40 320 22.5 80 5.6

6 2” 50 320 22.5 80 5.6

Dimensional details of CPVC pipes SDR 13.5

Dimensional details of CPVC pipes SDR 11

Pressure rating of CPVC pipes SDR 13.5

RAKSHA CPVC PIPES TECHNICAL SPECIFICATIONS

06

Sl NoN.B Pressure Rating

Inch mm73.4° F

Psi23° C

kg/cm2

180° F Psi

82° Ckg/cm2

1 ½” 15 400 28.0 100 7.0

2 ¾” 20 400 28.0 100 7.0

3 1” 25 400 28.0 100 7.0

4 1¼” 32 400 28.0 100 7.0

5 1½” 40 400 28.0 100 7.0

6 2” 50 400 28.0 100 7.0

Pressure rating of CPVC pipes SDR 11


Sl NoN.B Spacing

Inch mm20° CFeet

68° Fmtr

50° Cfeet

122° F mtr

70° Cfeet

158° F mtr

80° Cfeet

176° F mtr

1 ½” 15 5.50 1.70 4.50 1.40 3.00 0.90 2.50 0.80

2 ¾” 20 5.50 1.70 5.00 1.50 3.00 0.90 2.50 0.80

3 1” 25 6.00 1.80 5.50 1.70 3.50 1.10 3.00 0.90

4 1¼” 32 6.50 2.00 6.00 1.80 3.50 1.10 3.00 0.90

5 1½” 40 7.00 2.10 6.00 2.00 3.50 1.10 3.50 1.10

6 2” 50 7.00 2.10 6.50 2.00 4.00 1.20 5.50 1.10

Nominal Size

“G” min in (mm) “J” min in (mm) “N” min in (mm)

½” 0.382(9.70) 0.183(4.65) 0.102(2.59)

¾” 0.507(12.88) 0.235(5.97) 0.102(2.59)

1” 0.633(13.08) 0.287(7.29) 0.102(0.59)

1¼” 0.758(19.25) 0.339(8.61) 0.102(2.59)

1½” 0.844(22.45) 0.391(9.93) 0.102(2.59)

2” 1.134(28.83) 0.495(12.57) 0.102(2.59)

Operating Temperature

Pipe Size 2½” 3” 4”

23° CCPVC SCH 40 CPVC SCH 80

21.0929.53

18.2826.01

15.4722.50


21.0929.53

18.2826.01

15.4722.50

32° C CPVC SCH 40 CPVC SCH 80

19.1926.87

16.6423.67

14.0820.47


17.3024.21

14.9921.33

12.6818.45


16.2422.74

14.0820.03

11.9117.32


13.7119.19

11.8816.91

10.0514.62


13.0818.31

11.3316.13

9.5913.95


10.5514.77

9.1413.01

7.7311.25


9.9113.88

8.5912.23

7.2710.57


8.4411.81

7.3110.41

6.199.00


6.759.45

5.858.32

4.957.20


5.277.38

4.576.50

3.875.62


4.225.91

3.665.20

3.094.50

Horizontal and Vertical Support

Minimum dimension from center to end of socket (Laying Length) for CPVC 4120, SDR 11 Fittings

Pressure vs Temperature Rating Chart for CPVC SCH 40/80 Pipes

RAKSHA CPVC PIPES TECHNICAL PARAMETERS


Size

Socket Entrance Diameter in (mm)

Socket Bottom Diameter in (mm) Socket Length

in (mm) “C”min

Inside Diameter in (mm) “D”min

Wall Thickness in (mm)

Socket Entrance“EA”min.

Socket Buttom

“EB”min.“F”‘A’ Average ‘A’ Tolerance ‘B’ Average ‘B’ Tolerance

½” 0.633(16.08) ± 0.003(0.08) 0.619(15.72) ± 0.003(0.08) 0.500(12.70) 0.489(12.42) 0.068(1.73) 0.102(2.59) 0.128(3.25)

¾” 0.884(22.45) ± 0.003(0.08) 0.870(22.10) ± 0.003(0.08) 0.700(17.78) 0.715(18.16) 0.080(2.03) 0.102(2.59) 0.128(3.25)

1” 1.135(28.83) ± 0.003(0.08) 1.121(28.47) ± 0.003(0.08) 0.900(22.86) 0.921(23.39) 0.102(2.59) 0.102(2.59) 0.128(3.25)

1¼” 1.386(35.20) ± 0.003(0.08) 1.372(34.85) ± 0.003(0.08) 1.100(27.94) 1.125(28.58) 0.125(3.18) 0.125(3.18) 0.156(3.96)

1½” 1.640(41.66) ± 0.004(0.10) 1.622(41.20) ± 0.004(0.10) 1.300(33.02) 1.329(33.76) 0.148(3.76) 0.148(3.76) 0.185(4.70)

2” 2.141(54.38) ± 0.004(0.10) 2.123(53.92) ± 0.004(0.10) 1.700(43.18) 1.739(44.17) 0.193(4.90) 0.193(4.90) 0.241(6.12)

Size

Minimum applied pressure (kg/cm2)

Min.spec timeSDR 13.5 SDR 11

½” 36.68 46.39 10 min

¾” 30.51 38.24 10 min

1” 30.42 37.84 10 min

1¼” 30.46 38.09 10 min

1½” 30.40 38.06 10 min

2” 30.40 37.92 10 min

Size

Minimum applied pressure (kg/cm2)

Min.spec timeSDR 13.5 SDR 11

½” 85.23 107.71 60-70 sec

¾” 70.84 88.79 60-70 sec

1” 70.63 87.85 60-70 sec

1¼” 70.72 88.45 60-70 sec

1½” 70.60 88.36 60-70 sec

2” 70.58 88.04 60-70 sec

Tapered socket Dimension for CPVC CTS 4120, SDR 11, Plastic Pipe Fittings / Brass Threaded as per IS 554

Hydrostatic Pressure Test of CPVC Pipes

Quick Burst Testing at room temperature as per ASTM D-1599 Sample length:300 mm minimum free length between 2 end cap position. Conditioning at 23+2° C for 1 hr. The minimum burst pressure, hoop stress value should exceed 44.142 MPa.

Ideal for Residential, Industrial and Commercial Piping

08www.shandg r oup . c om

Basic Principles of Solvent CementingTo make consistently good joints, the following points should be clearly understood:

1. The joining surfaces must be softened and made semi-fluid2. Sufficient cement must be applied to fill gap between pipe and fitting3. Assembly of pipe and fittings must be made while the surfaces are still wet and cement is still fluid4. Joint strength develops as the cement dries. In the tight part of the joint the surfaces will tend to fuse together in the loose part,

the cement will bond to both surfaces. These areas must be softened and penetrated5. Raksha Solvent cement eliminates the use of primer upto 2” only.

Safe Handling of Solvents When using solvent cements, primers and cleaners there are some basic safety measures all users should keep in mind.

1. After every application of solvent on the pipe / fitting ensure to put the lid back on the solvent cement container & tighten the lid slightly to avoid evaporation & escape of solvent

2. Avoid prolonged breathing of solvent vapors. When pipe and fitting are being joined in enclosed areas, the use of ventilating devices are advised

3. Keep the cements, primers and cleaners away from all sources of ignition, heat, sparks and open flame4. Keep containers of cements, primers and cleaners tightly closed except when the product is being used5. Dispose of all rags used with solvents in a proper outdoor waste receptable6. Avoid eye and skin contact. In case of eye contact, flush with plenty of water for 15 minutes and call a physician

• NOTE:Thecompanyshallnotbeliableforanykindofdamage(s)tothepipingsystem,arisingoutofimproperuseand/orfaultyworkmanship.

Diameter of pipe in inch ½” ¾” 1” 1¼” 1½” 2” 2½” 3” 4”

Approx no. of joints which can be made per litre of

solvent cement1200 750 500 450 325 225 180 150 100

Table for usage of Raksha CPVC Solvent Cement

RAKSHA CPVC SOLVENT CEMENTS


SOLVENT CEMENT JOINING PROCESS

Cutting

Cut the pipe square handsaw with suitable guide or pipe cutter.

Deburring

Chamfer or Deburr pipe, at 10-15. Remove burrs from inside & outside diameters with a knife, file or abrasive paper. Insert the pipe into the fitting and check that the interference occurs about 1/3rd to 2/3rd of the socket depth. Too tight or loose filment may lead to leak, hence should be avoided. Remove any dirt, moisture, or grease from pipe end and fitting sockets with a clean dry rag.

Solvent Cement Application

Apply cement uniformly to inside of socket and outside of pipe end with a bristle nylon brush and a second coat of cement to pipe end. Apply cement quickly to prevent it from drying and completely cover all jointing surface area of the pipe and fitting. Do not apply excessive cement in bell socket.

Jointing

After applying the last coat of cement to the pipe, while cement is still wet (within 20 seconds)forcefully bottom the male end of the pipe in the socket giving pipe or fitting 1/4th turn to distribute the cement evenly.

Wiping

Wipe with a clean dry cloth after applying the solvent.

Cleaning

Cleaning with the cloth outside of the pipe & inside of the socket.


For CPVC pipes which are not embedded inside the wall but are carrying Hot Water from Boiler/Solar water heater, etc it is most important to use readymade expansion loop supplied by Raksha. Use one Raksha expansion loop for every 12ft run of the pipe, between two fixed joints.

For longer lines & longer distances between the fixed joints expansion loops can be made at site with calculations as per the Raksha manual. Illustration for use & correct clamping is provided separately.

• UseonecompanysuppliedexpansionloopbetweentwoconsecutivefixedJoints(9-15ftdistanceminimum)

THERMAL CONTRACTION AND EXPANSION

• NotrecommendedtodirectlyconnectCPVCpipestothewaterheateroutlet.OnemeterlongmetalnippleshouldbeconnecteddirectlytotheheatersothattheCPVCpipeisnotdamagedbythebuildupofexcessiveradiantheatfromtheflue.

CORRECT INSTALLATION IN SOLAR WATER HEATER LINES


12

• NOTE :The company shall not be liable for any kind of damage(s) to the piping system, arising out of improper use and/or faultyworkmanship.

Raksha Ball Valve is a high quality, economical quarter-turn shut off valve designed for water distribution in residential, commercial buildings, lawn sprinklers, gardens, spas, and other wide range of applications.

Rasksha Ball Valves provide exceptional chemical and corrosion resistance against rusting, scaling and pitting. The use of standard 0-Ring seals and PTFE seats enables bubble tight shut off.

Advantages

• Teflon Ball Seats: PTFE floating seat design offers smooth operation and reduces wear & tear• 0-Ring Seals: High grade, abrasion resistant elastomer 0-rings• High Impact Handle: Double stop engagement with excellent resistance to most environments• Leak Proof: Pressfit lock assembly with 0-rings ensures proper fitment without a gap between the ball & the stem. The teflon

seats provided on both sides of the ball also helps in preventing leakages

• Easy Installation: No special tools required for installation

Salient Features

• Long lifespan, light in weight & assembles quickly• Safe for sensitive applications as it is processed from non-toxic lead free compound• Easily installed with solvent cement• Can be installed in vertical or horizontal piping system• Ball Valves are hydrostatically tested• PTFE seats automatically compensate for fluctuations and wear & tear• Stem guides prevent side thrust• Open/ close positions indicated on handle• No metal part inside for corrosion to occur• Specially designed full bore which gives optimum flow rate

• Meets standards of PVC ball valves ASTM-D-2466 SCH-40 and CPVC ball valves ASTM-D-2846 SDR-11

System Operating pressure in °C 23 38 43 49 54 60 66 71 77 82

BallValve Pressure Rating

in kg/cm2

PVC - (SCH-40) as per ASTM D 2466 10.3 8.5 6.9 5.2 -- -- -- -- -- --

PVC - (SCH-80) as per ASTM D 2467 22 18 14 12 -- -- -- -- -- --

CPVC - (SDR-11) as per ASTM D 2846 10.3 9.7 9.0 8.3 7.6 6.9 6.2 5.5 4.8 4.1

Ball Valve Operating Pressure

CAUTION: Do not use for compressed air or gas.

RAKSHA CPVC BALL VALVES

HOT & COLDWATER APPLICATION

IDEAL FOR


Elbow 45°

Tee (Brass)

Male Adaptor Plastic Threaded

(MAPT)

Ball Valve

Coupler

Powder Coated Metal Clamp

End Cap

Threaded End Plug

Expansion Loop

Cross Tee

Female Adaptor Plastic Threaded

(FAPT)

Short Bend

Elbow 90°

Union

Equal Tee

Male Adaptor Brass Threaded (MABT)

RAKSHA CPVC PIPES & FITTINGS


CPVC Cement SolventFemale Adaptor Brass Threaded (FABT)

Tank Nipple

Male Adaptor Brass Threaded Fixed (MABT)

Reducing Bush

Female Adaptor Brass Threaded Fixed (FABT)

CPVC Pipes

Reducer Tee

Elbow 90° Brass

Flange Open

Reducer Coupler

Flange Closed

Converter Bushing

Reducer Elbow 90°Step Over Bend

Class of Pipe Standard Sizes

SDR 11 PipeIS 15778

ASTM D 2846½” - 2”

SDR 13.5 PipeIS 15778

ASTM D 2846½” - 2”

Sch 40 Pipe ASTM F 441 2½” - 4”

Sch 80 Pipe ASTM F 441 2½” - 4”

Class of Fittings Standard Sizes

SDR 11 Fittings ASTM D 2846 ½” - 2”

Sch 40 Fittings ASTM F 438 2½” - 4”

Sch 80 Fittings ASTM F 439 2½” - 4”

DIMENSIONS OF CPVC PIPES AND FITTINGS


Reducer Elbow 90 Brass Wall Mounted (with ear)

“ FREQUENTLY ASKED QUESTIONS

Is Raksha CPVC UV Protected?CPVCcompoundused formanufacturerofpipesandfittingsarealreadyUVprotected.Earliermore than45yearsofusehasshownthatthereisnodeteriorationinpressurewithstandingcapacityofRakshaCPVCpipeswhichhavebeeninstalledunderthesunlight,evenafterseveralyearsofinstallation.However,forextraprotectionforpipeswhicharedirectlyunderharshsunlight,anElastomericwatersolublepaintmaybeusedtocoatoverthepipes&fittingsintwolayerstogivethebestresults.

Do we need to insulate the CPVC pipes?ThermalconductivityofRakshaCPVCpipes&fittingsis0.14W/MKwhereasofcopperis400W/MK.SinceCPVCisaverybadconductorofheat,lightinsulationisrecommendedonlyforinstallationwherethereisacontinuousflowofhotwatere.gsolar/centralisedheater. Inbathroomswithindependentheaterswithin3meterslocationinsulationmaynotbenecessary.

How to repair the punctures in the wall chasing/concealed installation?Repairofpunctured&damagedpipeduetodrilling/chiselingcanbedonebyremovingthecementplasterandusingthepiperepairpiecesuppliedbythecompany.cleanthroughlytheareaofpipedamagedandmakeitdry.Applysolventcementonthesurfaceofpipeatdamagedportionintheentirecircumference.Alsoapplysolventcementontheinnersurfaceofpiperepairpiece&snaponoverdamagedarea.Tieasmallpieceofstring/bindingwirearoundtherepairpieceandpipeforsometimetoallowtoset.ThisisanuniquesystemavailablewithCPVCpipewherethedamagedpipeneednotbecutorshiftedback&forthforrepair.Pleaseconductpressuretestbeforereplastering.

How to prevent the damage due to drilling/ hammering?Afterconcealing,likeanyotherplastic/copperpipesRakshaCPVCpipes&fittingsarepronetodamage&puncturesduetodrilling/hammeringorchiseling.Toavoidsuchaccidents,pipingroute/layoutdiagramsandproperinstructionmaybegiventothecustomer,tiling,carpentry&electricianteams,Alsocontrastingcolourmaybeaddedtothecementmortarusedtofillthechasings.

Is the water passing through the solvent cement joints safe for drinking?RakshaCPVCpipes&fittingsaremadefromNSF(NationalSanitationFoundation)approvedrawmaterial.NSFisanindependentnon-governmentbodyinUSAforwaterpuritystandardandcertifiesthepipingsystemincludingsolventjointstobeusedforpotabledrinkingwaterapplication.

What is the expected performance of a CPVC water distribution system?CPVCpipingsystemshavebeeninstalledandoperatedsince1959,andinitialinstallationsarestillperformingfaultlessly.CPVCpipingwillnotfailprematurelyduetocorrosion,electrolysis,orscalebuild-upinareaswherewater,soil,and/oratmosphericconditionsareaggressiveandcanbesafelyusedforhotwatersupply.


For feedback / Suggestions / complaints write to : [email protected]

How to support the pipeline during wall chase installations?The installationmaybesupportedwith thehelpofpre-drilled15mmthickplywoodpiece,6” longby2”wide.Afterfixingthepipethewallchasingitmaybesupportedbyfixingtheplywoodpieceoverthepipe&thechasing.Only3to4suchsupportmaybeneededinonetoilet/bathroominstallation.Duringinstallationitisbesttoavoidcontactbetweenpipe&nails.Properlyalignandfirmlygroutallthreadedfittingsinsidethechasingwithstrongmixofcementandsand.Pipelineendsorelbowshouldbelaidatleast2.5cminsidethewallsurface.

Can we use the combination of CPVC and uPVC piping system?ItisstrictlyadvisedtouseCPVCpipesinallinternalplumbingforbothHot&Coldwaterline.Therehasbeeninstancesofthenon-returnvalvefailureorpressuredifferentialinHot&Coldwaterlineduetowhichhotwaterhasenteredinthecoldline.Ifthecoldwaterlinepipesisnottemperatureresistantthenitwillleadtoleakageorburstingcausinghugeloss&inconveniencetothecustomer.

Why to give the expansion loops in the solar hot water line?ForCPVCpipeswhicharenotembeddedinsidethewallbutarecarryinghotwaterfromboiler/solarwaterheater,etcitismostimportanttousereadymadeexpansionloopsuppliedbyShandGroupofIndustries.Useonereadymadeloopforevery9-12ft.runofthepipe,betweentwofixedjoints.Theloopsaredesignedforamax&mindiffrentialtempof70C.Forlongerline&longerdistancesbetweenthefixedjointsexpansionloopscanbemadeatsitewithcalculationaspertheRakshamanualorexistingavailableloopscanbeusedafterevery12feetlengthofpipe.

How long can CPVC systems be exposed to sunlight?CPVCcaneasilywithstandtheultravioletexposurecommonlyexperiencedduringtheconstructionphaseofaproject,providedon-siteinventoriesareturnedregularlyaswouldbeanticipated.IfCPVCisusedinabove-ground,outdoorapplications,protectionfromultravioletattackcanbeachievedbyshieldingorbypaintingthesystemwithanexterior-gradelatexpaint.

Should special considerations be taken to connect CPVC to a hot water heater?Insomeinstances,yes.However, theseconsiderationsarebasedonconcernsregardingexternalsourcesofheat.ThehotwaterfromtheheaterwillnotaffecttheCPVC.Whenconnectingtoagaswaterhear,CPVCshouldnotbelocatedwithin6”oftheheater’sflue,ifthefluehasnoinsulation.Ametalnippleorflexibleapplianceconnectorshouldbeused.Thismeasureeliminatesthepotentialfordamagetoplasticpipingthatmight result fromexcessiveradiantheat fromtheflue. If theflue is insulated, the instructionsof thefluemanufacturershouldbefollowed.

At what distance do we need to clamp the pipes?HorizontalorVerticalsupport/pipeclamping

Pipe Size(mm)

FOR Hot Water Supply

DIstance in Feet

FOR Cold Water Supply

DIstance in Feet

½” 2½ 5

¾” 2½ 5

1” 2½ 5

1¼” 3½ 6

1½” 3½ 6

2” 3½ 6


“ FREQUENTLY ASKED QUESTIONS

Protection against household hot water storage geyser temperature safety mechanism malfunctionsSomeplumbingcodescontaindetailedrequirementsforconnectionstogasorelectricstoragetypewaterheaters.Determinewhetheryourcodehassuchrequirementsandsatisfythem.CPVCcanbepipedtothe

electric water heaters with special metal-to-CPVC transitionfittings(photoA).Forwallmountedelectricalgeyserconnectionalwayskeeptheinletvalveopen&useflexibleplastichosepipetoconnectgeyser inlet toCPVCpipingsystem.Ongaswaterheatersthereshouldbeatleast6inchesofclearancebetweentheexhaustflueandanyCPVCpiping (photoB).Twelve inchlongmetalnippleorapplianceconnectorshouldbeconnecteddirectlytotheheatersothattheCPVCpipeisnotdamagedbythebuild-upofexcessiveradiantheatfromtheflue.Anapprovedtemperature/pressure(T/P)reliefvalveshouldbeinstalledsothattheprobeorsensingelementisinthewateratthetopof

theheater.CPVCisapprovedbyallthemodelcodesforuseasreliefvalvedrainlinepiping.Useametal-to-CPVCtransitionfittingtoconnecttothereliefvalveandcontinuethepipefullsizetotheoutlet.Forhorizontalruns.slopethepipetowardtheoutletandsupportitatthree-footcentersorcloser.Thepipemustdischargetotheatmosphereatanapprovedlocation.DonotuseCPVCpipeandfittingswithcommercial-type,non-storagewaterheaters.

Raksha CPVC limited warrantyRakshawarrantstotheoriginalownerthattheproductwillbefreefrommanufacturingdefectsandconformtocurrentapplicableASTMstandardsundernormaluse.Buyers’remedyforbreachofthiswarrantyislimitedtoreplacementof,orcredit for, thedefectiveproduct.Thiswarrantyexcludesanyexpenseforremovalorreinstallationofanydefectiveproductandanyotherincidental,consequentialorpunitivedamages.

This limited warranty will not apply if:•Rakshapipesandfittingcombinationswithanyotherbrand/makeofpipes&fittings•RakshaCPVCsolventcementisnotusedforfitments•Iftheproductsareusedforpurposeofotherthanthedistributionofdomesticwater•Iftheproductareusedincompressedairorgasapplication•Iftheproductarenotinstalledwithproperworkmanship,consistentwithnormalindustrystandards•Iftheproductshavebeensubjectedtomodification,misuse,misapplication,impropermaintenanceorrepair•Ifthepipingsystemcomponentsaretestedwithcompressedairorgases•Ifthedamageiscausedbyfaultyuseornegligence•Iftheproductfailduetofreezingofwater•Iftheproductarebroughtincontactwithchemicalagents,fireretardantmaterials,threadsealantetc.

CPVC Pipe

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