two pressure tanks (buildings) on one well


  #1  
Old 11-24-13, 12:07 PM
M
Member
Thread Starter
Join Date: Nov 2013
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
two pressure tanks (buildings) on one well

Hi -

I've got a well plumbing/wiring problem that has me stumped and would appreciate any advice!

I've got two buildings, each with their own pressure tanks, pressure switches, and electric feeds. The originally had separate wells, but one's gone bad and I want them to share a common well/pump.

I've got the water lines both connected to the pump with a tee and have the pump wired from one building/tank through the second building/tank to the pump.

Works fine, but the pump is only controlled from one of the tanks, the second pressure switch is not connected to anything. I thought that this would work, figuring that the pressure drop for the second tank would show up in the first (?), but sometimes I'll lose all pressure in the second tank.

How should I set this up so both pressure tanks can control the pump? What is the right way to handle this sort of situation?

-Scott
 
  #2  
Old 11-24-13, 12:14 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,040
Received 3,417 Upvotes on 3,064 Posts
Welcome to the forums.

Ideally the water pressure would be almost the same at both tanks since they come from a common well pump.

Therefore you only need to have one power source and pressure switch.

If you really wanted both switches to operate one pump you would have to add wiring between the two pressure switches but only using one power source.
 
  #3  
Old 11-24-13, 02:27 PM
M
Member
Thread Starter
Join Date: Nov 2013
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
Thanks! That's what I figured and it's worked ok till now. Glad to know that one pressure switch should work for both. Maybe what I'm seeing today is because of the cold freezing up one of the lines so the pressure can't equalize or a bad pressure switch.

I'll check on the lines and switches tomorrow.

Thanks again,

-Scott
 
  #4  
Old 11-25-13, 05:05 AM
V
Vey
Vey is offline
Member
Join Date: Mar 2006
Location: Mid-Florida
Posts: 1,201
Upvotes: 0
Received 0 Upvotes on 0 Posts
Running one pump with two switches from one well rarely works properly. What if both call for water at the same time? I think the tanks have to be close together to manifold them together or that won't work either.

Better to just run a pipe over there and use one tank, basically extending the size of the piping system. This will cause more wear on the pump because one tank is probably not big enough for two families.

Sadly, when you mention frozen pipe, that means frozen ground. Here in sunny Fla., we wouldn't even have to bury it if we didn't mind mowing around it. I mowed Saturday.
 
  #5  
Old 11-25-13, 05:13 AM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 15,984
Received 79 Upvotes on 71 Posts
You need to adjust the psi in the tanks according to the pressure switch your using...

The one that is losing pressure probably has too much air in it...

And there may be a lag.. Set both tanks about 5 psi below cut in pressure..

So say cut in is 40 psi... set the tanks to 35 psi..

This needs to be done (adjusting the air in the tanks0 with 0 psi on the system....
 
  #6  
Old 11-25-13, 07:08 PM
M
Member
Thread Starter
Join Date: Nov 2013
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
OK - things are working fine now. There was a bit of supply line that was in a crawl space and got frozen in our cold spell this weekend, so the pressure couldn't equalize across the tanks. Added a bit of heater cable and thawed it today and all is ok running the two pressure tanks controlled from a single pressure switch.

Sounds like that there are other things that can go wrong with this sort of setup, but so far so good. The buildings are about 100 yards apart with the well in the middle, so there isn't a long run between them.

Thanks again for the comments.

-Scott
 
 

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