Water Piping Guidelines - Navien NR-180 Installation Manual

Gas Water Heater Installation
█ Plumbing:
NR, NP Series
NOTICE :
If using mixing valves on the outlet, choose one which prevents cold water
pressure from overcoming hot water line pressure.
The flow rate of hot water may vary when more than two faucets(appliances,
fixtures, etc.) are being used simultaneously.
If a Water Heater is installed in a closed water supply system, such as one
having a backflow preventer in the cold water supply line, means shall be
provided to control thermal expansion. Contact the water supplier or local
plumbing inspector on how to control this situation.
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Water Piping Guidelines

Y-Strainer
NR-A, NP-A Series
Y-Strainer