Vent Pipe Preparation

FIGURE 28

1. INITIAL PREPARATION.

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.

2. SELECTION OF MATERIALS.

• Cutting Device - Saw or Pipe Cutter.

3 in. (7.6cm)

MIN. LENGTH

A VENT USED IN A SPECIAL VENTING SYSTEM WITH POSITIVE VENT PRESSURE AND PASSING THROUGH A ROOF SHALL EXTEND AT LEAST 450mm (18 in.) ABOVE THE HIGHEST POINT WHERE IT PASSES THROUGH THE ROOF SURFACE AND ANY OTHER OBSTRUCTION WITHIN A HORIZONTAL DISTANCE OF 450mm (18 in.). A VERTICAL

VENTING SYSTEM MUST BE SUPPORTED EVERY 1.5m (5 ft.).

TERMINATION

MAY BE 45°

ELBOW OR A

“T” ELBOW

RODENT

18 in. SCREEN

(45cm) (INSTALL INTO

ELBOW)

ROOF

LINE

• Deburring Tool, Knife, File, or Beveling Machine (2

in. and above).

• Brush - Pure Bristle.

• Rag - Cotton (Not Synthetic).

• Primer and Cleaner.

• Solvent Cement - PVC for PVC Components and

CPVC for CPVC Components.

• 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.

• Insertion Tool - Helpful for larger diameter pipe and

ﬁttings 6 in. (15cm) and above.

FIGURE 29

IMPORTANT

The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the National Fuel Gas Code (ANSI Z223.1) and as listed below:

1.Vent Termination must extend a minimum of 18 in. (46cm) above roof or 18 in. (46cm) above the anticipated snow level to prevent blockage of the vent termination, as shown in Figures 28 and 29.

28	www.americanwaterheater.com

316888-004 specifications

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American Water Heater 316888-004 warranty Vent Pipe Preparation, Initial Preparation

Models: 316888-004