Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 15-03-2018, 10:23   #16
Registered User

Join Date: Aug 2016
Location: Brazoria, Tx
Boat: '72 Ta Chiao 41'
Posts: 16
Re: Pressurized fresh water pump triggered every 2 hours

Hope y'all don't mind I ask for help with my fresh water issue.

When I switch power on to fresh water it draws 10 amps for 20 seconds even though I don't hear it pumping. If I release the pressure before I flip the switch, it will only run for a couple of seconds but continues to draw 10 amps for about 20 seconds. All my lights have been converted to LED so it takes only 0.2 amps to run the light in the head near where the fresh water pump is, but I see it flickering the entire time that the pump is drawing 10 amps. If I turn on additional lights in the forward cabin where the pump is, they all flicker the same.

Another thing that is curious, the switch panel has led indicators which lite when the switch is engaged. All the others go off immediately when turned off. The fresh water indicator light takes a few seconds to "bleed down" as if it were a battery/capacitor losing power. Is that normal?

Any feed back would be appreciated!
Duece is offline   Reply With Quote
Old 15-03-2018, 12:00   #17
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 2,959
Re: Pressurized fresh water pump triggered every 2 hours

Amp draw doesn't just happen. If the draw continues after the pump stops it could be the motor is failing in some way. Maybe a bad bearing gets hot and freezes, stopping the motor. Or the motor itself has problems in the windings. You could have contact points sticking and the pump doesn't have enough power to start when the plumbing is at full pressure. And so on...
Lepke is offline   Reply With Quote
Old 15-03-2018, 12:04   #18
Registered User
 
Jammer's Avatar

Join Date: Jan 2010
Posts: 1,927
Re: Pressurized fresh water pump triggered every 2 hours

Quote:
Originally Posted by BrettB View Post
For the last few weeks, our pressurized fresh water pump is being triggered every 2 hours or so for about half a second.

So far I have yet to find a leak. Could this be a sign of another issue besides a leak somewhere?
It could be a sign that the check valves in the pump leak so that the water works its way back into the tank. This is common. The only reliable way to fix it is to replace or overhaul the pump.
Jammer is offline   Reply With Quote
Old 15-03-2018, 12:39   #19
Registered User

Join Date: Aug 2016
Location: Brazoria, Tx
Boat: '72 Ta Chiao 41'
Posts: 16
Re: Pressurized fresh water pump triggered every 2 hours

Lepke,

The amp draw is consistent & 20 seconds each time, & during that time the lights in the head (LED) flicker lightly (barely noticeable) as if the pump was idling, but I don't hear it like when it is pumping. Also no lights flicker when it is pumping normally with faucet open & water flowing.

Jammer,

It never looses pressure. I turn it off every time I leave & I can go down to the boat a week later & turn on the water & it releases what looks like full pressure. Turn the faucet off, switch the power on, it pumps for a few seconds, stops, but the current remains 10 amps for 20 seconds every time, then goes to 0 amps & as I said above lights flicker.

Any thoughts about why it takes a few seconds for the switch indicator light to bleed down?
Duece is offline   Reply With Quote
Old 15-03-2018, 12:45   #20
Registered User

Join Date: Oct 2010
Location: Inner Harbor, Baltimore, MD
Boat: Island Packet 380-02, Priority
Posts: 11
Re: Pressurized fresh water pump triggered every 2 hours

Another, and even more likely possibility is that a small amount of air is getting into the system. Sources include connectors not being tight enough (or not having plumbers tape wrapped around the threads of the connectors) or a small crack (in one case I had a small crack in the filter before the pump that didn't drip but was letting air into the system. Air is compressible, unlike water, and slowly the pressure drops and the pump cycles. In any event you won't see any drips. So try tightening everything
rmez is offline   Reply With Quote
Old 15-03-2018, 12:58   #21
Registered User

Join Date: Sep 2017
Location: nowra nsw australia
Boat: 32 contessa
Posts: 207
Re: Pressurized fresh water pump triggered every 2 hours

I had a pump cycle every 4 hours then it started 2 hours then every 15 minutes ,, i pulled my hair out for months ,,, i found the problem ,,
The Pressure switch .
As it was going bad the spring inside was getting weaker , i had changed near every pipe and fiting even the bladder ,,

$20 switch . Oh well everything is new should last another 30 years ,
Good luck and let us know ,
__________________
The greatest evil is physical pain.
Saint Augustine
Robert Tilbury is offline   Reply With Quote
Old 15-03-2018, 13:20   #22
Registered User
 
Simi 60's Avatar

Join Date: Jun 2016
Location: Australia
Boat: Milkraft 60 ex trawler
Posts: 3,050
Re: Pressurized fresh water pump triggered every 2 hours

Ours did this
Replaced pressure switch and it still did it.
Several weeks later it did it more often
Then it started getting hot and died.

Replaced and carry a spare.
Simi 60 is online now   Reply With Quote
Old 15-03-2018, 14:20   #23
Registered User

Join Date: Jan 2011
Location: Sydney
Boat: Farr 1020
Posts: 410
Re: Pressurized fresh water pump triggered every 2 hours

I searched for 2 months, replaced bits left right and centre but still did not find the problem.
Then found it - the hot water clarifier was heated by the sea water cooling the engine. Replaced the calorifier and it is now plumbed to the fresh water cooling. Issue resolved.
Djarraluda is offline   Reply With Quote
Old 15-03-2018, 16:26   #24
Registered User
 
TheOffice's Avatar

Join Date: Jun 2012
Location: Annapolis
Boat: Hylas 44
Posts: 888
Re: Pressurized fresh water pump triggered every 2 hours

Had a bad relief valve on a hot water heater.
TheOffice is offline   Reply With Quote
Old 15-03-2018, 16:35   #25
Registered User

Join Date: Jan 2011
Location: Sydney
Boat: Farr 1020
Posts: 410
Re: Pressurized fresh water pump triggered every 2 hours

Quote:
Originally Posted by TheOffice View Post
Had a bad relief valve on a hot water heater.
I did not even have a relief valve on the old one. Perhaps that is why something popped!
I actually wondered how the tank was being depleted at the rate it was when there were no apparent leaks. It was all going to the engine cooling water! New engine and it was now pushing bright green coolant into the bilge, without the engine running, so the source was now obvious.
Djarraluda is offline   Reply With Quote
Old 16-03-2018, 09:03   #26
Registered User

Join Date: Dec 2009
Posts: 290
Re: Pressurized fresh water pump triggered every 2 hours

Whenever mine cycled every so often like this, its always been the diaphram in the pump. Sometimes its get a a small dirt in it preventing it from sealing good, or its aging and becoming stiff. In that case a simple rebuild is in order.

You can test the theory if it an internal leak by simply closing the water valve going to your water tank. If your pumps check valve is leaking, water will not be able to go back into the tank, dropping WP and allowing your pump to cycle on. If your pump still cycles with the valve closed, you have an external leak of some sort on the output circuit side of the pump. At least it will point you in the right direction without any effort
US1Fountain is offline   Reply With Quote
Old 16-03-2018, 09:11   #27
Registered User

Join Date: Aug 2010
Posts: 1,857
Re: Pressurized fresh water pump triggered every 2 hours

Quote:
Originally Posted by Duece View Post
Hope y'all don't mind I ask for help with my fresh water issue.

.................

Any feed back would be appreciated!
It would be more polite to start a new thread for a new, unrelated, problem rather than hijacking someone else's thread.
Shrew is offline   Reply With Quote
Old 17-03-2018, 17:08   #28
Registered User

Join Date: Jan 2016
Location: San Diego, CA
Boat: Beneteau 40.7
Posts: 257
Re: Pressurized fresh water pump triggered every 2 hours

I vote for a problem with the pump itself. Either there is a crack in the diaphragm or some debris is lodged in a critical place. Have you tried running the pump at maximum rate (open a few faucets) to clean out the pump?
When I had an issue of this sort I found the slightest drip from a faucet directly into a sink drain so there was no wetness visible.
thunderhoof is offline   Reply With Quote
Old 18-03-2018, 18:07   #29
Registered User

Join Date: Sep 2013
Posts: 102
Re: Pressurized fresh water pump triggered every 2 hours

And another possiblity.

I had 2 symptoms which I didn't put together until the middle of the night in a dream.

My pump was cycling like yours about every hour for half a second. Looked everywhere but couldn't find a problem. At the same time my engine was creating coolant which overflowed slightly onto the top of the heat exchanger from the cap. I don't really believe in the engine gods bestowing me with free coolant so I gave it a lot of thought. Turned out the fresh water heater tank internal pipe which piipes the hot engine cooling water had a pin hole leak. The pressure from the fresh water pump (approx 50psi) was greater than the internal pressure limit of the heat exchanger cap (about 7psi) hence the overflow.

Unlikely but a possibility.

Good luck

Andrew
elandra65 is offline   Reply With Quote
Old 21-03-2018, 08:04   #30
Registered User

Join Date: Mar 2015
Posts: 92
Re: Pressurized fresh water pump triggered every 2 hours

Coolant theory is interested. I was bestowed with a little extra coolant about a month ago.

Also interesting. We use to have a similar occurrence of the pump when we left our transom shower on at the valve but off at the handle. Well, I installed a new transom shower a few weeks ago. I decided to try leaving the new transom shower on at the valve(off at handle) and this issue stopped! And now I have a convenient transom show that I just press the handle anytime rather than having to bend over and turn on a valve... I haven't bothered to turn the valve off again to repro the issue, because I think we are better off now than we were before.
BrettB is offline   Reply With Quote
Reply

Tags
water

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Has anyone triggered the overload flag on a safety tether? thinwater Health, Safety & Related Gear 5 16-12-2017 16:25
Pressurized water: a blessing or a curse? GTom Construction, Maintenance & Refit 68 29-08-2017 08:34
Compressed Co2 Pressurized Water nimblemotors Plumbing Systems and Fixtures 97 10-03-2014 14:34
Raw Water Pump vs Fresh Water Pump Cheechako Engines and Propulsion Systems 44 01-02-2012 15:31
Cruisers: Pressurized Fresh Water ? Beersmith Plumbing Systems and Fixtures 80 22-11-2011 02:46

Advertise Here


All times are GMT -7. The time now is 19:00.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.