Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-01-2012, 16:46   #1
Marine Service Provider

Join Date: Aug 2010
Location: north carolina
Boat: command yachtsdouglas32
Posts: 3,113
Plumbing maintainance question...

Why does water pump cycle in the gally sink when not being used? in Oday 39. It sporadically makes a humming noises throughtout the day even without use...
__________________

__________________
tropicalescape is offline   Reply With Quote
Old 01-01-2012, 16:52   #2
Marine Service Provider

Join Date: Aug 2010
Location: north carolina
Boat: command yachtsdouglas32
Posts: 3,113
Re: Plumbing maintainance question...

Any replys would be greatly appericated, thank you for any help in advance!!!
__________________

__________________
tropicalescape is offline   Reply With Quote
Old 01-01-2012, 16:56   #3
Registered User

Join Date: Apr 2011
Location: vancouver, canada
Boat: hunter 31
Posts: 609
Re: Plumbing maintainance question...

If its on a pressure switch, you may have a slow leak somewhere, usually, but not always, a leaky faucet. Make sure you turn all faucets off tightly, and check for a periodic drip. If ok, check for a leak somewhere else in the system.
__________________
shorebird is offline   Reply With Quote
Old 01-01-2012, 17:08   #4
Registered User
 
sailvayu's Avatar

Join Date: Mar 2006
Location: Fort Myers FL
Boat: Irwin 40
Posts: 878
Re: Plumbing maintainance question...

THere are several reasons other than a water leak that could cause cycling but that is a good place to start. If your bilge pump cycles as well that is a good clue there could be a leak in the system. Low pressure or a water logged expansion tank will cause pump cycling. Also a leaking check valve in the pump or system can be at fault. These problems can be annoying but often not hard to fix.
__________________
Capt. Wayne Canning, AMS
www.projectboat.info
http://sailvayu.com/
sailvayu is offline   Reply With Quote
Old 02-01-2012, 08:08   #5
Marine Service Provider
 
peghall's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: Feb 2011
Posts: 1,533
Re: Plumbing maintainance question...

If it's a diaphragm pump, diaphragms are rubber and have a finite lifespan (typically anywhere from 10 years live-aboard to 20 years for they typical weekend warrior). The first little bitty pinhole leak causes the pressure to drop just enough to make the pump cycle VERY briefly ("brrrp") every few hours...then gradually more frequently and a little longer each time...till finally the pump will run continually without moving any water.

You CAN buy a rebuild kit or just a diaphragm kit, but rebuild kits cost almost as much as a new pump--IF you can still get the one you need for your pump--and if you only replace the diaphragm, the pressure switch will be next thing to go. Water pumps have really improved over the years so, adding all that up, it makes more sense to replace the pump (2.8 gpm is the right size for 99% of boats) and rebuild the old one to keep as spare that you'll prob'ly never need.
__________________
2017 Peggie Hall
Specializing in marine sanitation since 1987
Author "The NEW Get Rid of Boat Odors"
https://www.amazon.com/New-Get-Rid-B...dp/1892399784/
peghall is offline   Reply With Quote
Old 02-01-2012, 08:24   #6
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,372
Re: Plumbing maintainance question...

Like Peg and sailvayu said.

Your water pump has a built in pressure switch that causes it to come on when you turn on the water OR if the water pressure drops for any other reason, like water leaking out of the system but very often because the water leaks back into the tank through the check valve.

Sailvayu's suggestion to watch the bilge pump or check your bilge for fresh water will probably confirm if the problem is the water leaking out of the system or an internal pressure drop.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 02-01-2012, 09:21   #7
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,155
Re: Plumbing maintainance question...

I would vote for bad valves in the pump. Leaks are usually pretty obvious. The bilge pump cycleing, dripping sound and dropping water level in the tank. Valves are the most common problem with water pressure pumps. What make and model of pump is it?
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Reply

Tags
plumbing

Thread Tools
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
question marks on all channel markers for cmap 93 chart sdowney717 OpenCPN 21 20-12-2011 14:57
Rookie Question on Furling Headsail scubascooter Seamanship & Boat Handling 12 15-10-2011 13:11
Rigging Terminology Question Matt sachs Deck hardware: Rigging, Sails & Hoisting 4 12-09-2011 20:48
Crew Question: Logistics Pleione General Sailing Forum 5 24-06-2011 20:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:04.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.