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Topic: Odd noise after shutting off faucet (Read 480 times) previous topic - next topic

Odd noise after shutting off faucet

We are using city water and the last few days we have been hearing a low noise that to me sounds like whirring after I shut the faucet off. Last a few seconds. This happens at all faucets and the toilet. It's not the water pump, it's off. Sounds like pressure is building up. I'm going to check the accumulator tank, but if that is not it has anyone have this noise. Maybe burp the water heater? but it's when I'm running the cold water.
Thanks
Ed and Michele
2000 U295  36'  (Build #5600)
8.3 ISC 350HP.
2012 Jeep Grand Cherokee (Toad)
2001 Lance Truck Camper (Sold)
2001 Lazy Daze (Class C). RK Floor Plan (Sold)

Re: Odd noise after shutting off faucet

Reply #1 –
Quote from: Lance Camper –
We are using city water and the last few days we have been hearing a low noise that to me sounds like whirring after I shut the faucet off. Last a few seconds. This happens at all faucets and the toilet. It's not the water pump, it's off.

Just in case, I would have someone physically monitor the water pump next time.  I *think* some are driven by a latching relay and yours could still be running even with the switch off if the relay is stuck.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Odd noise after shutting off faucet

Reply #2 –
If you are not using the water pump and are connected to pressurized city water it may be your fill valve chattering when pressure drops a bit and then builds again after you close the faucet. Check the pump anyway but even if the pump is on it shouldn't make noise.  It might be your accumulator tank.  If you press on the air valve and water comes out then it needs to be replaced.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Odd noise after shutting off faucet

Reply #3 –
Checked all of the above. Good thing I did my relatively new accumulator tank was down to 20 PSI so I corrected that, but the tank only comes into play when using the water pump. No noise when on water pump alone.
Flowing water and building pressure seems to be the culprit. I just can't find where it is vibrating. It is louder behind the hose reel, moving/holding the pex piping does not diminish the noise. It is coming from behind the wall. Grrrrr, gonna open her up later.

Thanks
Ed
Ed and Michele
2000 U295  36'  (Build #5600)
8.3 ISC 350HP.
2012 Jeep Grand Cherokee (Toad)
2001 Lance Truck Camper (Sold)
2001 Lazy Daze (Class C). RK Floor Plan (Sold)

Re: Odd noise after shutting off faucet

Reply #4 –
Quote from: Lance Camper –
Flowing water and building pressure seems to be the culprit. I just can't find where it is vibrating. It is louder behind the hose reel, moving/holding the pex piping does not diminish the noise. It is coming from behind the wall. Grrrrr, gonna open her up later.


Given the noise location - I wonder if it's your fresh water check valve, if the shuttle is failing or failed it could make a rattling noise.  I don't know where the check valve is located in a 2000.  In a 2003 it's behind the utility bay wall right after the line from the hose reel goes into the coach.

It's a shot in the dark, but easy to check.  Disconnect from city water and turn on the water pump.  If water flows out the hose the check valve has failed.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Odd noise after shutting off faucet

Reply #5 –
We only use city water to fill the tank and then use the pump until the tank is low. You never know what city pressure is and if you have a failure of a coach water component, you might need to call FEMA. We even shut off the pump when leaving the coach for any length of time.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Odd noise after shutting off faucet

Reply #6 –
Quote from: Michelle –
Given the noise location - I wonder if it's your fresh water check valve, if the shuttle is failing or failed it could make a rattling noise.  I don't know where the check valve is located in a 2000.  In a 2003 it's behind the utility bay wall right after the line from the hose reel goes into the coach.

It's a shot in the dark, but easy to check.  Disconnect from city water and turn on the water pump.  If water flows out the hose the check valve has failed.
Ooooh, mine is accessible behind the hose reel. I changed it myself at Camp Foretravel Feb 2016, so that is doubtful. I will certainly check it (pun intended)  :D before I open up the utility bay wall. I think I might need a stethoscope.
Ed and Michele
2000 U295  36'  (Build #5600)
8.3 ISC 350HP.
2012 Jeep Grand Cherokee (Toad)
2001 Lance Truck Camper (Sold)
2001 Lazy Daze (Class C). RK Floor Plan (Sold)
 

Re: Odd noise after shutting off faucet

Reply #7 –
Quote from: Lance Camper –
I think I might need a stethoscope.

A good tool to have, and who doesn't like a project that lets you buy a new toy for the toolbox?  :D  Most auto parts places sell them.  If you don't have one, get an telescoping inspection mirror as well while you're there.  And a telescoping magnetic pick-up tool.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320