Cruisers Forum
 


Join CruisersForum Today

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 19-12-2019, 18:04   #1
Registered User

Join Date: Nov 2009
Posts: 190
Problem with fresh water pump

This morning the fresh water pump for the main water system on my sailboat was working fine. We then motored 6 nm in 15 kts of wind and 2-foot seas. We ended the day at a marina. Later that day the water pump started cycling. It goes on for 2 seconds, goes off, and then repeats in 8 to 10 seconds.


The pump is a Jabsco 25 psi automatic water system pump (Model 31600-0292 ... has been superseded by a new version) and the system has an accumulator and particle filter. The water tank is 150 gallons and is nearly completely full.



Any ideas what is happening? Do I need to replace the pump?


Marcus
__________________

mlibkind is offline   Reply With Quote
Old 19-12-2019, 18:12   #2
rbk
Registered User
 
rbk's Avatar

Join Date: Feb 2016
Location: Canada
Boat: T37
Posts: 1,811
Re: Problem with fresh water pump

Loose connection somewhere causing leak and loss of pressure. Look for water weeping from a fitting.
__________________

rbk is offline   Reply With Quote
Old 19-12-2019, 18:56   #3
cruiser

Join Date: Jul 2007
Location: currently in Bahamas
Boat: Hunter 410
Posts: 16,293
Re: Problem with fresh water pump

Theres either a leak in the system or the pump check valves are leaking back
sailorboy1 is offline   Reply With Quote
Old 19-12-2019, 19:04   #4
Registered User
 
sparrowhawk1's Avatar

Join Date: Jan 2014
Location: Miami Beach Fl
Boat: Colombia Cc 11.8
Posts: 1,691
Re: Problem with fresh water pump

My guess is that there might be algae in the valves.
sparrowhawk1 is offline   Reply With Quote
Old 19-12-2019, 20:10   #5
Registered User

Join Date: Nov 2009
Posts: 190
Re: Problem with fresh water pump

Thanks for all the quick replies and the suggestions.


I don't think it is caused by a water leak. At least there is no noticeable water reaching the bilge.



I do think the stuck check valves makes a lot of sense. I'm sitting out 20 to 30 kts of wind right now and will for the next two days. I have a spare pump (not an exact fit but usable) and will see if swapping it out helps. If so, it might be worth trying to fix the check valves because the pumps are very expensive.


Cheers.


Marcus
mlibkind is offline   Reply With Quote
Old 20-12-2019, 10:06   #6
Registered User

Join Date: Oct 2019
Posts: 80
Re: Problem with fresh water pump

Clean the check valves
Stewie12 is offline   Reply With Quote
Old 20-12-2019, 10:10   #7
Registered User
 
AndyEss's Avatar

Join Date: Dec 2016
Location: Sea of Cortez/northern Utah/ Wisconsin/ La Paz, BCS
Boat: Hans Christian 38 Mk II
Posts: 625
Images: 1
Re: Problem with fresh water pump

Until you try cleaning the pump valves, just
shut off the drinking water pressure circuit. When you need to use water, turn it back on. That will help you from draining your house batteries - and a lot of unnecessary pump cycling
AndyEss is offline   Reply With Quote
Old 20-12-2019, 12:24   #8
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 8,615
Re: Problem with fresh water pump

Quote:
Originally Posted by mlibkind View Post
Thanks for all the quick replies and the suggestions.


I don't think it is caused by a water leak. At least there is no noticeable water reaching the bilge.



I do think the stuck check valves makes a lot of sense. I'm sitting out 20 to 30 kts of wind right now and will for the next two days. I have a spare pump (not an exact fit but usable) and will see if swapping it out helps. If so, it might be worth trying to fix the check valves because the pumps are very expensive.


Cheers.


Marcus
This may sound stupid. try giving it a rap with something like a wrench.
Cadence is offline   Reply With Quote
Old 20-12-2019, 12:58   #9
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 8,038
Re: Problem with fresh water pump

Quote:
Originally Posted by mlibkind View Post

I don't think it is caused by a water leak. At least there is no noticeable water reaching the bilge. >>>>>>>>>>>>>>>>>>

It doesn't have to be a large leak. I had the same problem and traced it down to a small slit in the hose to the head sink which was way back under the engine. So little water came out and never made it to somewhere anyone could see.


A small leak MEANS you are losing pressure in the system, which is why the pump keeps cycling.


As always, whenever this recurring question appears, every single domestic water pump MANUAL has detailed TROUBLESHOOTING instructions.


RTFM, and good luck.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 20-12-2019, 13:26   #10
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 22,321
Re: Problem with fresh water pump

Either a minor leak, or air has become trapped in a hose somewhere. Culprits are often a bubble of air in hose loop/bend.
For leaks run your dry hand on every foot of hose. If wet your leak is near by.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 20-12-2019, 14:40   #11
Registered User

Join Date: Feb 2007
Location: Live in Boise, boat is in the Rio Dulce
Boat: 56' CNSO Mikado Cutter Ketch
Posts: 353
Re: Problem with fresh water pump

I had a similar problem and it turned out to be a loose connection on the water maker output to water tank hose. No water leak but the pressure would escape causing my freshwater pump to cycle.

BTW, a replacement pressure regulator for your pump is only a few dollars if that is what the problem turns out to be. I carry a couple spares.
Mikado is offline   Reply With Quote
Old 21-12-2019, 04:49   #12
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,198
Images: 241
Re: Problem with fresh water pump

Quote:
Originally Posted by Stu Jackson View Post
... As always, whenever this recurring question appears, every single domestic water pump MANUAL has detailed TROUBLESHOOTING instructions...
Indeed ➥ https://www.pumpagents.com/pdf/Jabsc...31600-0292.pdf
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 21-12-2019, 06:21   #13
Registered User
 
LittleWing77's Avatar

Join Date: Oct 2018
Location: Toronto, Ontario
Posts: 531
Re: Problem with fresh water pump

Geez, Stu - no need to be rude. He'd just rather have input from some humans. Which is why we're all members of this Forum.

Oh, and Merry Christmas!

Marcus, I've done the same thing as AndyEss and just switched off the circuit, only turning it on when I need water. As he says, this will avoid draining your batteries and burning out the pump until you can clean the check valves and/or find the leak (I'm voting for a hard-to-find leak).

Let us know, will you?

Happy Happy, Merry Merry,
Warmly,
LittleWing
LittleWing77 is online now   Reply With Quote
Old 21-12-2019, 17:48   #14
Registered User

Join Date: Sep 2007
Location: Queensland, Australia
Boat: None at present--between vessels. Ex Piver Loadstar 12.5 metres
Posts: 1,179
Re: Problem with fresh water pump

Probably not. I would clean all of the hoses, and also look for leaks. The tiniest leak can cause this. Also, if you are using an old pump with a pressure diaphragm operating a micro-switch, you will find an accumulator is a big advantage. If you are using an electronic sensor using a piezo system, I found they worked better withoiut an accumulator, but that is just me.

I also found, although this is not your problem, that the later pumps had rubbish el-cheapo bearings. They did not last long--and I replaced all mine with Japanese stainless steel pre-filled with lubricant sealed waterproof bearings--good for a few thousand hours of use.

Why they did not fit good bearings in the first place beats me--it would have added fifty bucks to the cost--and most of us would have paid it gladly to have a smooth and quiet pump. The difference was profound.
Mike Banks is offline   Reply With Quote
Old 21-12-2019, 20:07   #15
Registered User
 
chris mac's Avatar

Join Date: May 2015
Location: edmonton alberta
Boat: 1992 lagoon 42 tpi
Posts: 763
Re: Problem with fresh water pump

We just had a similar problem. Pump would kick on for 2 seconds a couple times a night.(when no water was being used) turned out to be a very mild leak in the sink faucet. So no water into bilge, and not really any noticeable leak into the sink. It doesn't take a big leak to lose pressure and kick in the pump
__________________

chris mac is online now   Reply With Quote
Reply

Tags
pump, water, water pump

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
Water Pump (fresh water) sailorboy1 Engines and Propulsion Systems 8 03-01-2019 21:20
Fresh Water, Gray Water and Black Water Holding Tanks vweber Plumbing Systems and Fixtures 10 13-07-2018 20:25
I am having a problem with my fresh water system freshwater pump motion30 Plumbing Systems and Fixtures 13 03-02-2017 13:22
Fresh water problem Markhunter1097 Plumbing Systems and Fixtures 3 31-08-2015 14:41
Raw Water Pump vs Fresh Water Pump Cheechako Engines and Propulsion Systems 44 01-02-2012 15:31

Advertise Here


All times are GMT -7. The time now is 18:59.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.