Plumbing Connection; Material Specifications; Connection Sizes; Pipe Sizing - Rheem 3805 Series Owner's Manual And Installation Instructions

Plumbing Connection

All plumbing work must be carried out by a qualified person and in accordance with all local codes
and regulatory authority requirements.

Material Specifications

All piping used must be capable of withstanding the temperature and pressure conditions that may
exist within the system. The pipe used must be suitable for high temperature (99
pressure applications (850kPa). The pipe material must also be of a type that will not corrode when
in contact with potable water.

Connection Sizes


Cold water inlet:

Hot water outlet:

TPR valve:

Pipe Sizing

To achieve true mains pressure operation, the cold water line to the water heater should be the
same size or bigger than the hot water line from the water heater. The pipe sizing for hot water
supply systems should be carried out by persons competent to do so, choosing the most suitable
pipe size for each individual application. The following suggestion is a guide only:

Main pipe 20mm (¾ "); branch pipe not smaller than 15mm (½ ").
P a g e | 10
RP ¾" / 20 (English system Sealed cylindrical inner thread)
RP ¾" / 20 (English system Sealed cylindrical inner thread)
RP ¾" / 20 (English system Sealed cylindrical inner thread)
o
C) and high