Rheem MHD75245 Use & Care Manual page 9

Typical Installation
Temperature & Pressure
Relief Valve
Seal Ring
(Inside nut)
Hex Union Nut
(Relief Valve)
Top of Water Heater
Junction Box
Drain Valve
Drain Pan
Pre-solder 12" minimum
Cold Inlet Shut
stub pipes before
Off
installing to unit.
Hot Water Outlet
Support the relief valve drain
pipe using metal strapping or
wire fastened to the structure
overhead
Heat Trap 6"
Minimum
Thermal Expansion
Tank (if required)
See thermal
expansion section
Union
on page 6.
(The addition of a union at
this point will help in the
replacement of the T & P Relief
Valve should the need arise.)
Drain Pipe -(3/4" minimum)
No threads permitted on
end of Drain Pipe.
6" Maximum distance
from drain pipe to
suitable open drain.
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