Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > 5th Wheel Discussion
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 08-06-2013, 02:08 PM   #1
Senior Member
n5pht's Avatar
Winnebago Owners Club
Join Date: Aug 2012
Posts: 411
Blog Entries: 1
Black Flush Regulator

New problem. I drained the tanks today (first time in this location) and all went well until I started the black tank flush. The black and grey values still were open. Water started spewing out from the little black plastic regulator under the sink. I then realized it was part of the blank tank flush. I called a local Keystone dealer (25 miles away) - we are currently in Oregon - and he said Yes that plastic pressure regulators are breaking easily. So, he suggested I replace it with a brass regulator that is built much better and should last. I did make the replacement.

Now when I use the black flush I don't hear the typical "swirling around sound" that I had heard since getting this trailer. I left the black flush on and turned off the main water supply and held the toilet flush and sure enough it sounds like the tank is being cleaned with the black flush - just not the loud swirling sound I was used to hearing.

Options? 1. the pressure here is low and that might account for the difference? It is quite low and this is the first time I have used the black flush. 2. The new brass regulator changes things?

I don't care as long as the flush is doing its job - but wondered if others have had this experience?


Gary and Karen Stone - stick home in Texas
LCMS Church - 2014 Minnie Winnie 31KP, 2014 Jeep Gary is N5PHT, Ham Op, Retired from Fed Gov
n5pht is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-12-2013, 09:53 PM   #2
Senior Member
Ray,IN's Avatar
Join Date: Aug 2001
Location: North America somewhere
Posts: 12,300
New to me; I've never heard of the black tank flushing system being inside the "house" part of the trailer. Our Grand Junction's system only had a hose connection outside with the PEX tubing running directly to the black tank, the backflow preventer was just prior to the black tank, under the floor. There is no water pressure regulator in the flushing system, it would defeat the purpose, because it is never closed, the spray-head is always open. At home my outside hydrants are unregulated,and line pressure is 100psi. It rinses the black tank very well, and the sound of the swirling spray is obvious.
As to low CG water pressure, I have experienced the same lack of spraying sound often.

2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 08-13-2013, 06:10 PM   #3
Senior Member
Join Date: Sep 2012
Posts: 4,232
Ray is right in all he said. The flush system is a separate water line; there is not pressure regulation to it.
Only difference between flush inlet and city water inlet is flush inlets don't have check valves.
jesilvas 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

» Virginia Campgrounds

Reviews provided by

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 -6. The time now is 12:03 PM.

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