Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 10-07-2016, 09:39 AM   #1
Mark Speir
2007 27' Classic FB
Cedar Crest , New Mexico
Join Date: Apr 2013
Posts: 3
Water Pressure Bladder or Accumulator Tanks

Hi all,
Wondered if there is any experience out there installing a water expansion/accumulator bladder type tank in an RV. These are common in homes with wells. They are to aid in preventing the pump from cycling on and off so frequently any time the faucet is turned on. I was considering installing a small one so the diaphragm pump wound not need to cycle on for just a quick opening of the faucet...I presently have a 55-Aquajet AES series pump with a pressure cut out from 65 to 75 psi. The newer ones advertise variable output and that they reduce the need an accumulator tank, but mine cycles after just 3-4 ounces of water is flowed through any faucet. I am specifically looking for experience in using one larger than 1 gallon, maybe a 2-4 gallon one.

Anyone out there use this type of system configuration with experience they would like to share? (Of course it's another system to winterize I realize)....
thanks Mark
mspeir is offline   Reply With Quote
Old 10-07-2016, 10:07 AM   #2
Rivet Master

2014 20' Flying Cloud
Sag Harbor , New York
Join Date: Jun 2015
Posts: 17,533
Welcome to the forum Mark! Adding an accumulator is often done, and there are tons of threads on this, as these search results will show:

Sometimes locating the accumulator is tight in particular models, so you might want to check on this 2006-2010 Classic sub-forum:

where you could start a new topic if you wish, as I can't find any previous accumulator discussions there.

Good luck!

OTRA15 is offline   Reply With Quote
Old 10-07-2016, 10:47 AM   #3
2 Rivet Member
Williker's Avatar
1992 25' Excella
Orange County , New York
Join Date: Jun 2015
Posts: 33
Just like a residential expansion tank, one of any size that the space you have will allow can be added. It just has to be installed on the pressure side of your check valve on the cold water line with a T fitting appropriate for whatever pipe is in your TT. They sell them at big box stores commonly between 2 gallons and 5 gallons, just make sure it's for potable water. Some even have brackets to secure them to a wall.
The one gallon size are common because they fit under the sink without giving up usable space.
Williker is offline   Reply With Quote
Old 10-17-2016, 08:05 PM   #4
Rivet Master
sgschwend's Avatar
1986 25' Sovereign
2008 F350, 6.4L diesel , Oak Harbor, WA
Join Date: Sep 2015
Posts: 605
Images: 13
Works great, put ours under the bathroom sink.
sgschwend is offline   Reply With Quote
Old 10-17-2016, 09:11 PM   #5
Site Team

, Minnesota
Join Date: Aug 2003
Posts: 7,681
Images: 59
I use a 2 gal tank. It will deliver 3 to 4 qts water when the pump is turned off.

It will still cycle whenever you open a tap. The pump will turn on whenever the pressure drops below the set point, usually around 45 psi.
markdoane is offline   Reply With Quote

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

Advanced Search
Display Modes

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 Pressure: Shore pressure high, All pressure in trailer low.... bhooves Sinks, Showers & Toilets 9 10-16-2016 03:22 PM
Adding Water Pressure Accumulator dkottum Plumbing - Systems & Fixtures 50 09-22-2013 01:27 PM
New Water Pump or Accumulator Al - K4GLU Water Heaters, Filters & Pumps 4 08-15-2007 09:45 AM
ShurFlo Accumulator?!? SilverToy Water Heaters, Filters & Pumps 6 04-19-2005 10:07 PM
Bladder Tank 73ANDY Plumbing - Systems & Fixtures 7 04-15-2003 06:46 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 08:55 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.