Navien CH-180 Installation Manual - Pressure Reducing Valve

Pressure Reducing Valve

3. Installation Example

4. Replace the Pressure Reducing Valve procedure

The reducing valve’s water flow is 4.9 GPM with inlet water pressure is 56 PSI, at the time of 

factory shipping. If more water flow, 5.7 GPM is needed with inlet water pressure is 56 PSI, 

please change the reducing valve installed Red O-Ring among the enclosed reducing valve.

If more water flow, 6.4 GPM is needed with inlet water pressure is 56 PSI, include the 

O-Ring among the enclosed reducing valve.

Release Kit

Find water inlet adapter located on the bottom of the unit.

Release inserted water inlet filter from water inlet adapter turning counterclockwise.

Check the ass’y of water pressure reducing valve inside of water inlet adapter.

Pull the ass’y of water pressure reducing valve out from water inlet adapter with

supplied release kit.

PRESSURE REDUCING VALVE

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