Bad Circulation Pump or Cavitation?

Reply

  #1  
Old 12-12-19, 10:19 PM
D
Member
Thread Starter
Join Date: Dec 2019
Posts: 2
Received 0 Votes on 0 Posts
Bad Circulation Pump or Cavitation?

Hot water loop, with circulation pump. I suspect the noise is air in the impeller, but I'm not 100% sure. Before I send this pump back for warranty replacement, I'd like your opinion on whether or not its actually a bad pump, or, as I suspect, cavitation. The pump is located at the end of the loop as it returns to the water heater through the drain port. There is no air vent installed in front of the pump even though the installation instructions recommend one. Pump was installed by the builder's plumbing contractor.

Video showing the pump, and the noise it is making:
https://youtu.be/4pQYyKVyQGc
 
  #2  
Old 12-12-19, 10:27 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,725
Received 1,316 Votes on 1,216 Posts
Welcome to the forums.

Sounds like a bad pump to me.
 
  #3  
Old 12-13-19, 07:07 AM
D
Member
Thread Starter
Join Date: Dec 2019
Posts: 2
Received 0 Votes on 0 Posts
Thanks Pete, for the welcome, and the answer
 
 

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