Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 17-07-2009, 11:05   #16
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 3,720
I have a diaphragm bilge pump, with no backflow.

My shower sump pump has a Rule type pump with a checkvalve to prevent backflow. The problem with the checkvalve arrangement is that the pump has to overcome the head pressure of the water behind the checkvalve in order to start the flow, and if there is any air under the pump, it won't prime. If I have been well heeled over, I have to burp the air out of the system to get my shower sump pump to prime.

Due to the safety implications of a bilgepump system, I would think twice about installing a checkvalve downstream of a Rule (vane) type pump.

donradcliffe is offline   Reply With Quote
Old 17-07-2009, 14:13   #17
Registered User
Maddog's Avatar

Join Date: Jul 2005
Posts: 318
I have a Johnson Pump that has an internal check valve. A flapper that is built into it.

It's kind of like tearing up $100 bills while standing in a cold shower.
Maddog is offline   Reply With Quote

bilge, bilge pump

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
Bilge pump recommendations rebel heart Plumbing Systems and Fixtures 34 31-12-2012 06:08
Which Bilge Pump Switch Do You Like ? over40pirate Plumbing Systems and Fixtures 33 12-04-2012 16:01
Another Bilge Pump Thread cal40john Plumbing Systems and Fixtures 23 18-07-2010 17:38
Bilge Pump Carpy0126 Powered Boats 2 08-05-2009 21:08
Bilge Pump Failures ? GordMay The Sailor's Confessional 6 14-08-2003 01:23

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:12.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.