Question about Grundfos MQ3-35 3/4 HP Pressure Booster Pump
The only thing that would cause a problem like that is when the pump is no longer primed - the water has drained out of it and it runs on empty = overspeeds.
You need to replace the valves, they are leaking. Also make sure that the rain tank is clean, dirt and debris might block the valves.
Posted on Oct 05, 2010
Most likely the water supply to the second story is not holding water for a few hours, and so the pump has to repump it up the supply line until it works. There could be a slightly leaky stop valve or whatever is being used to hold the water in the line when off, but it sounds like it might work at times and not at other times.
Have never messed with something like this, just sounds like what's happening. I read on a blog that this pump takes 5 minutes to self prime from a 26 ft well, so it sounds like sometimes it's having to re-prime.
Good luck, and hope this helps.
Hope this helps.
Posted on Sep 30, 2010
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 23, 2018 | Plumbing
May 03, 2017 | Replenish Home
Apr 26, 2016 | Home
Mar 06, 2011 | Grundfos Comfort System Recirculator ...
Dec 30, 2010 | Grundfos Comfort System Recirculator ...
Dec 18, 2010 | Grundfos MQ3-45 1 HP Pressure Booster...
May 04, 2010 | Grundfos MQ3-35 3/4 HP Pressure Booster...
Nov 18, 2009 | Home
Nov 09, 2009 | Grundfos MQ3-45 1 HP Pressure Booster...
Jun 07, 2009 | Siemens SpeedStream 4200 (13A4200001)...
839 people viewed this question
Usually answered in minutes!