(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 4 of 4

Thread: Navien pressure valve

Hybrid View

  1. #1
    DIY Junior Member
    Join Date
    Nov 2009
    Location
    Canada
    Posts
    2

    Default Navien pressure valve

    We had Navien tankless water heater installed about a week ago. The pressure relief valve was installed away from the drain opening in the floor and the installed told us that it was ok beacuse there wouldn't be any water leaking from it anyway.
    Well, there has been quite a bit of water coming from the pressure relief pipe, flooding the floor in that area.
    My question is: Should the pressure relief valve leaking this often or was the pipe installed incorrectly away from the drain?
    Thanks for your help!

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,401

    Default

    What is your house water pressure? Do you have a pressure reduction valve? With a tankless, you don't normally need an expansion tank, but that could be an issue. A pressure relief valve is a safety device. Normal house pressure should not be high enough to trigger it. It could be defective. If your house water pressure is quite high, you should install a PRV. Note, water pressure can change quite a bit from daytime to night time, with late night/early morning hours possibly the worst. When is the valve opening?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Junior Member
    Join Date
    Nov 2009
    Location
    Canada
    Posts
    2

    Default

    The pipes haven't been installed correctly. I just went downstairs and the assembly just below the chassis has leaking seals. The main hot water feed from the heater is 2" pipe and goes into a reducer to match the house piping. Is that okay, or should that pipe be 2" until it reaches the place where all the various pipes branch out tot he rest of the house? Looks like a bad install to begin with, but I wonder about the thought process of the guy that put it in. I'll be complaining to the contractor to the someone else in here.

  4. #4
    Illinois Licensed Plumber SewerRatz's Avatar
    Join Date
    Nov 2008
    Location
    Chicago, IL
    Posts
    1,705

    Default

    Quote Originally Posted by Kiisu View Post
    The pipes haven't been installed correctly. I just went downstairs and the assembly just below the chassis has leaking seals. The main hot water feed from the heater is 2" pipe and goes into a reducer to match the house piping. Is that okay, or should that pipe be 2" until it reaches the place where all the various pipes branch out tot he rest of the house? Looks like a bad install to begin with, but I wonder about the thought process of the guy that put it in. I'll be complaining to the contractor to the someone else in here.
    If you could post some pictures. That would be helpful to us all

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •