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TEMPERATURE AND PRESSURE RELIEF VALVE –
CONDENSATE DRAIN - The water heater should either be raised several inches above the floor on a concrete slab or
use a low profile condensate pump to allow free drainage of condensate from the elbow drain fitting. This water heater is
a condensing type unit and requires a drain to be located in close proximity to allow the condensate to drain safely. The
condensate drains from the unit at the exhaust elbow located near the bottom of the unit. Using an approved primer and
cement (refer to “Venting” section), connect a 3/4" elbow or 3/4" coupling over the outside of the drain outlet and use 3/4"
pipe for the drain trap and condensate line to a drain. Make sure the condensate drain line slopes down, away from the
water heater at least 1/8" per foot toward the drain. The condensate drain pipe must not be routed through an area
subject to below freezing temperatures. The condensate build-up will block the exhaust outlet, which will cause improper
operation. Refer to Figure 2 for the proper connection of an elbow to the drain outlet and a condensate trap.
Keep clear of the combination temperature and pressure relief valve discharge line outlet. The discharge may
be hot enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive temperatures and pressure, install temperature and pressure protective equipment
required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally
recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as
meeting the requirements of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22 and the Standard CAN1-4.4 Temperature, Pressure, Temperature and Pressure Relief Valves
and Vacuum Relief Valves. The combination temperature and pressure relief valve must be marked with a maximum
set pressure not to exceed the maximum working pressure of the water heater. The combination temperature and
pressure relief valve rating must not be less than the hourly rating of the water heater.
Install the combination temperature and pressure relief valve into the opening provided and marked for this purpose on
the water heater.
Note: Some models may already be equipped or supplied with an installed combination temperature and pressure
relief valve. Verify that the combination temperature and pressure relief valve complies with local codes. If the
combination temperature and pressure relief valve does not comply with local codes, replace it with one that does.
Follow the installation instructions above on this page.
Install a discharge line so that water discharged from the combination temperature and pressure relief valve will exit
within six (6) inches (15.2 cm) above, or any distance below the structural floor and cannot contact any live electrical
part. The discharge line is to be installed to allow for complete drainage of both the combination temperature and
pressure relief valve and the discharge line. The discharge opening must not be subjected to blockage or freezing.
DO NOT thread, plug or cap the discharge line. It is recommended that a minimum clearance of four (4) inches
(10.0 cm) be provided on the side of the water heater for servicing and maintenance of the combination temperature
and pressure relief valve.
Do not place a valve between the combination temperature and pressure relief valve and the tank!
WARNING