Troubleshooting Fresh Water System - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > Gear & Maintenance
 Not a Member? 
  #1  
Old 07-05-2012
Junior Member
 
Join Date: Sep 2010
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
wrbanwal is on a distinguished road
Troubleshooting Fresh Water System

Hello fellow boaters

I have a Jabsco model 36800 electric fresh water pump and need help understanding where to start troubleshooting my problem


After initial priming the system, when I run a facet the pump runs fine and shuts off. But after not using the water for a period of time, when I run a facet, it starts out fine then losses pressure and starts to spit air. then the pump does not shut off until I "re-prime" or let the pump come back to pumping water and no air.

any ideas?
Reply With Quote Share with Facebook
  #2  
Old 07-05-2012
BarryL's Avatar
Senior Member
 
Join Date: Aug 2003
Location: Long Island, NY
Posts: 1,538
Thanks: 3
Thanked 17 Times in 16 Posts
Rep Power: 11
BarryL is on a distinguished road
Re: Troubleshooting Fresh Water System

Hey,

It sounds like the pump is drawing air. Have you serviced the water system recently? Have you changed filters or anything like that? If so, check what you did first. If not, you'll have to check each fitting, from the tank to the pump. I had a similar problem a few years ago. It started right after I cleaned a strainer before the pump. When I put the strainer back together I tightened it too much and cracked it. The crack was very fine, but enough to let air into the system and the pump would never turn off because of that.

Barry


Good luck,
Barry
__________________
Barry Lenoble
Day To Remember, 1986 O'day 35 For Sale
Deep Blue C, 2002 C&C 110 For Sail
Mt. Sinai, NY

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 07-05-2012
sea_hunter's Avatar
Senior Cruiser
 
Join Date: Jul 2000
Posts: 512
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
sea_hunter is on a distinguished road
Funny, I had a similar problem a number of years ago. Check the inlet side of the pump make sure water is running freely to the point of the pump, ie make sure nothing is restricting the water from the tank. I actually found a butt connector stuck in the water line.
Reply With Quote Share with Facebook
  #4  
Old 07-05-2012
bljones's Avatar
Senior Member
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,069
Thanks: 31
Thanked 68 Times in 61 Posts
Rep Power: 7
bljones has a spectacular aura about bljones has a spectacular aura about
Re: Troubleshooting Fresh Water System

do you have a vent on the tank? if not, crack the fill cap on the tank slightly.
__________________
It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #5  
Old 07-05-2012
Member
 
Join Date: Nov 2008
Posts: 50
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 6
bobnpaula is on a distinguished road
Re: Troubleshooting Fresh Water System

We just dealt with a similar problem. We noticed after de-winterizing that we had intermittent spitting of air (but not always!); pressure variation, at times quite low, then would flow with more pressure, then repeat; and unless water was flowing really well, pump would not shut off (prime). With all these symptoms, and no obvious water leak or visible problem with system, we were stumped and thinking we had to replace the pump, or pressure switch was shot, or debris in pump... our research made the possibilities seem endless.
Then, thinking it through led us to realize that just because no water is leaking out, air can still be leaking IN. Start with that. We have two tanks, with two runs of hose (with a strainer each) into our water pump. Because we did have the "spitting air" symptoms, we thought we should consider that as the cause first. We looked at both strainers for loose cover or hose fitting or a even a crack. nothing. Then, my husband tightened each clamp on the hoses connecting to the water pump from both water tanks. just a little tightening. VOILA !! System is now working fine, no air spitting, pump shuts off like a charm as soon as you shut off faucet. Pressure is consistently good! All our problems seemed to be caused by a minimally loose hose fitting. Because we have two tanks feeding the pump, and a line that extends to galley sink, head sink, bow washdown and stern shower, we were overwhelmed when considering how to troubleshoot this situation. LESSON LEARNED: start with the simplest (and most likely) cause first. Start from your tank(s) and tighten the clamps and inspect each connection. Just because you don't see a leak doesn't mean that air isn't leaking INWARD. Don't make our mistake and jump to the worst case scenario that pump is shot! All of the symptoms we had were ultimately caused by a leakage of air into the system, before the pump. Check that first! and Good Luck.
Reply With Quote Share with Facebook
  #6  
Old 07-06-2012
travlineasy's Avatar
Morgan 33 O.I. Perryville
 
Join Date: Dec 2010
Location: Maryland
Posts: 2,054
Thanks: 3
Thanked 38 Times in 36 Posts
Rep Power: 4
travlineasy will become famous soon enough
Re: Troubleshooting Fresh Water System

Just answered this question on a similar post. If you have both a manual pump and electric pump using the same water line from the tank, you must close the valve to the manual pump to prevent air from being drawn into the system. It worked for me.

Good Luck,

Gary
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cleaning out the fresh water system TakeFive Gear & Maintenance 4 04-30-2010 06:22 AM
Troubleshooting water system malfunctioning stiffwind Gear & Maintenance 2 05-10-2009 07:54 AM
Fresh Water System daHorton Gear & Maintenance 11 05-13-2008 08:20 AM
Fresh water system maureena5 Gear & Maintenance 6 03-07-2007 06:34 PM
Sailboats Fresh Water System? 1970Columbia34 Gear & Maintenance 3 02-19-2007 11:37 AM


All times are GMT -4. The time now is 11:11 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012