Use and Care Manual

TANKLESS WATER HEATER
5. To facilitate any future maintenance, it is also recommended that an approved gas union fitting be installed
in the supply line between the shut-off valve and the ¾3/4” female NPT connection on the water heater.
3. Measure the length of the gas supply line from the gas meter to the water heater. Water heater must be
installed downstream of the gas meter to ensure adequate gas supply. Use the tables in this manual or refer to
the gas line manufacturer’s sizing information to determine the correct supply pipe size.
4. A manual gas shut-off valve should be installed in the gas supply line close to the water heater. See Figure 15
for detail.
6. Test the gas pressure to make sure it meets the minimum standards and does not exceed the maximum
standards of the water heater.
7. Leak test the gas line pipe before placing the water heater in operation. Only use approved leak detector
liquid solutions to check for leaks.
8. Do not operate the water heater until all connections have been completed and the heat exchanger is filled
with water.
Figure 14 – Gas Line With Shut-Off Valve Detail
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