Vacuum Relief Valve


Old 03-31-14, 07:32 PM
Thread Starter
Join Date: Mar 2009
Location: United States
Posts: 476
Received 0 Votes on 0 Posts
Vacuum Relief Valve

What are these for (like the Watts N36-M1)? I see they are for vacuum relief on the cold side of water tanks, but why would vacuum build up in a system?
Sponsored Links
Old 04-01-14, 05:59 AM
NJT's Avatar
NJT is offline
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 1 Vote on 1 Post
why would vacuum build up in a system?
I suppose an example would be when draining a water heater for service...

Wouldn't happen under 'normal' circumstances.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes
Ask a Question
Question Title:
Your question will be posted in: