A.O. Smith 197835-001 Manuel D’Utilisation

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 A.) Make  sure  the  solvent  cement  you  are  planning  to  use 

is designed for the specific application you are attempting.

  B.) Know the physical and chemical characteristics and limitations of the 

PVC and CPVC piping materials that you are about to use.

  C.) Know the reputation of your manufacturer and their products.

  D.) Know your own qualifications or those of your contractor. The solvent 

welding technique of joining PVC and CPVC pipe is a specialized skill 

just as any other pipe fitting technique.

  E.) Closely supervise the installation and inspect the finished job before 

start-up.

  F.)  Contact the manufacturer, supplier, or competent consulting 

agency  if  you  have  any  questions  about  the  application  or 

installation of PVC and CPVC pipe.

 G.)  Take the time and effort to do a professional job. Shortcuts will only 

cause you problems and delays in start-up. By far, the majority of 

failures in PVC and CPVC systems are the result of shortcuts and/or 

improper joining techniques.

 

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 Cutting Device - Saw or Pipe Cutter.

 

 

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 Deburring Tool, Knife, File, or Beveling Machine (2” and above).

 

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  Brush - Pure Bristle.

 

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 Rag - Cotton (Not Synthetic).

 

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 Primer and Cleaner.

 

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 Solvent Cement - PVC for PVC Components and CPVC for CPVC 

Components.

 

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 Containers - Metal or Glass to hold Primer and Cement. Select the 

type of PVC or CPVC materials to be used on the basis of their 

application  with  respect  to  chemical  resistance,  pressure  rating, 

temperature characteristics, etc.

 

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 Insertion Tool - Helpful for larger diameter pipe and fittings 6 inches 

(15.2cm) and above.

It is recommended that Tetrahydrofuran (THF) be used to prepare the

surfaces of pipe and fittings for solvent welding. Do not use water,

rags, gasoline or any other substitutes for cleaning PVC or CPVC

surfaces. A chemical cleaner such as MEK may be used.

The  cement  should  be  a  bodied  cement  of  approximately  500  to

1600 centipoise viscosity containing 10-20% (by weight) virgin PVC

material  solvated  with  tetrahydrofuran  (THF).  Small  quantities  of

dimethyl  formamide  (DMF)  may  be  included  to  act  as  a  retarding

agent to extend curing time. Select the proper cement; Schedule 40

cement should be used for Schedule 40 pipe. Never use all-purpose

cements, commercial glues and adhesives or ABS cement to join PVC

or CPVC pipe and fittings.

Select a suitable pure bristle type paint brush. Use a proper width brush

or roller to apply the primer and cement (see chart below). Speedy

application of cement is important due to its fast drying characteristics.

IMPORTANT NOTE: A dauber type applicator should only be used

on pipe sizes 2” and below. For larger diameter pipe, a brush or roller

must be used.

Nominal Pipe (IPS)

Size Brush Width

2

1.5” (3.8cm)

3

1.5”-2.5” (3.8cm - 6.4cm)

 A.) Cutting  Pipe  must  be  squarely  cut  to  allow  for  the  proper 

interfacing of the pipe end and the fitting socket bottom. This 

can be accomplished with a miter box saw or wheel type cutter 

Wheel type cutters are not generally recommended for larger 

diameters since they tend to flare the corner of the pipe end. If 

this  type  of  cutter  is  used,  the  flare  on  the  end  must  be 

completely removed.

NOTE: Power saws should be specifically designed to cut plastic pipe.