Cruisers Forum

Join CruisersForum Today

  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 10-07-2014, 07:10   #1
Registered User

Join Date: Mar 2010
Location: Hamilton, MA
Boat: Cabot 36 - Que Sera
Posts: 38
Freshwater system/pressure issues

I installed a new Whale freshwater pump (UF0815) rated at 2.2 GPM a year ago, expecting that it would give me plenty of power for my two faucets and occasional showering on my 36-foot sailboat. It seemed to work fine last season, but during the winter I added a hot-water check valve and things have deteriorated.

Since adding the check valve, I am typically greeted with an explosive burst of water and air when I turn on the main galley faucet, located just a few feet from the pump. Rather than a smooth flow of water, it is intermittent at best even with the pump activated well in advance.

Among the things I have checked/considered:
-water tanks are full
-the strainer that came with the pump is clean
-I've considered adding an accumulator tank, although my reading suggests that should not be necessary with a modern pump
-I've removed my water filter from the line
-I'm wondering if my 35-year-old galley faucet could be the culprit and plant to check the faucet in my head to see if the same problem occurs

Any advice in troubleshooting and/or improving the problem would be greatly appreciated.
chuck g is offline   Reply With Quote
Old 10-07-2014, 07:49   #2
Writing Full-Time Since 2014
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 6,456
Re: Freshwater system/pressure issues

The most likely source of air is degassing of air in the hot water heater. Normally, this only happens if the hot water heater is seriously overheating (over 160F at least in some small area). Have you noticed how a pot begins to hiss, then stops, then boils when it hits 212F? The pre-boil is degassing.

Why did you add the valve? Was hot water somehow coming backwards? If so,what ever is causing the backflow is the root of the problem, as it is probably also the cause of the over heating. Is it an instant water heater?
Gear Testing--Engineering--Sailing
thinwater is online now   Reply With Quote
Old 10-07-2014, 08:18   #3
Registered User

Join Date: Mar 2010
Location: Hamilton, MA
Boat: Cabot 36 - Que Sera
Posts: 38
Re: Freshwater system/pressure issues

Thanks for the reply. I added the check valve because the hot water was also coming our of the cold water side of the faucet. The problem existed long before updating the freshwater pump.
chuck g is offline   Reply With Quote


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
Freshwater System Plumbing Anduril Plumbing Systems and Fixtures 50 11-06-2015 19:27
Advice freshwater system carlager Engines and Propulsion Systems 10 18-03-2014 10:53
Freshwater Pressure Problem jumperlee Plumbing Systems and Fixtures 23 09-10-2011 19:34
Weak Freshwater Pressure hazegray Plumbing Systems and Fixtures 2 26-07-2011 08:24
connecting multiple tanks to freshwater system (+) vacendak Plumbing Systems and Fixtures 12 14-01-2009 12:10

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:19.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.