Water pressure and expansion tank


  #1  
Old 10-19-18, 07:39 AM
K
Member
Thread Starter
Join Date: Oct 2018
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
Water pressure and expansion tank

Does the house water pressure and the pressure in the expansion tank have to be the same? I know if the water pressure is higher then the tank should be too but if the tank is high say 75 does the water pressure have to be that or can it be lower?
 
  #2  
Old 10-19-18, 07:57 AM
P
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 27,768
Received 2,183 Upvotes on 1,953 Posts
The instructions for the one I recently installed said to set the air pressure to be the same as the water pressure but no more than 80 psi.
 
  #3  
Old 10-19-18, 08:11 AM
A
Member
Join Date: Mar 2010
Location: USA
Posts: 4,532
Upvotes: 0
Received 279 Upvotes on 255 Posts
For best performance, the expansion tank for a water heater should be preset as described above.

If the expansion tank is already installed when presetting or repressurizing is needed, shut off the main water and open a faucet upstairs before adding or letting out air.
 
 

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