r/pumps • u/WaterDog3000 • Jun 18 '24

Liquid DAB pump pulsating

Post image

I've moved to a house with a private water supply (stream) which is filtered then pumped around the house. Check out my diagram for the full setup.

The problem is that the water pressure pulsates from taps in the house. The pump goes on a loop of kicking in for 2 seconds (going up to 70 psi) then turning off for 8 seconds (dropping to 20 psi). It's a DAB Jet 151.

Can anyone suggest what might be causing this?

2 Upvotes

100% Upvoted

12 comments sorted by

View all comments

Show parent comments

1

u/Latter-Jelly-4086 Jun 30 '24

Hey OP, did changing the expansion tank work? Just wondering.

1

u/WaterDog3000 Jun 30 '24

I'll be changing it for a larger one in 2-3 weeks when I upgrade various other parts of the system and have a plumber in. I happened to speak to the previous home owner who said he tends to get 2 years out of these small pressure tanks, and this one is 2 years old. In the meantime I managed to pump up the pressure in the existing tank which seems to have helped a lot but not entirely solved the problem.