RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 02-07-2014, 03:56 PM   #1
Member
 
Join Date: Mar 2011
Location: Manitoba, Canada
Posts: 34
Black Tank Flush Check Valve - B & B Molders Model 571

Just passing on some info regarding above. 2 weeks ago I noted a slow leak from the noted valve (which in my 2011 Mountain Aire Mod 4336 is located in the rear bathroom, under the sink and towards back corner of the cabinet). It is a black plastic molded item with a plastic inlet line and a 90 degree outlet with another plastic line. There is a check valve in between the two connections. The purpose of the valve is to allow black tank flush water to enter the tank but not return. In my case the check valve was not sealing properly when the black tank water line was connected to the flush system in the water bay even when the outside faucet was turned off. The residual water in the line would leak past the check valve and drip inside the bathroom cabinet. I removed the valve itself, soaked it in vinegar for a few hours and then poured olive oil into both the inlet and outlet connections of the valve. I assumed the valve might have been suffering from hard water deposits but that is just a guess. Later in the day I reconnected the valve and it leaked a very small amount when the black water line was pressurized as well when it was not pressurized. As a result I emailed B & B Molders of Mishawaka, IND and they were quick to phone and email me back. They advised they had very few failures of the valve and would send me a new one free of charge, no shipping charges and a self addressed envelope to return the old valve. I was very happy with their response and the in-depth phone call I had with them to try to diagnose what caused the failure. I should add that the sales manager advised that water pressure of less then 7 psi might not allow the check valve to seat properly and therefore residual water in the water line inlet might bypass the check valve but I had never noticed a problem in the past when I left the line connected and faucet turned off. A new part is approx. $29. I asked about using brass valves which are on the internet at about $64. I was advised that the plastic molded part should not be any less reliable then brass. I thought this information would be of value to other owners. I suggest you may want to keep an eye on your black tank flush check valve when using the system to prevent any disasters from occurring in your bathroom cabinet from a leaking valve.
Darrell Madill - 2011 Mountain Aire 4336
__________________

Darrell-Ruth 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 02-07-2014, 05:17 PM   #2
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 28,427
Thanks for the write up and explanation, Darrel.
Can you possibly post a picture of the valve I and others may never have seen it and it may be only MA or other highline coach item.
__________________

__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 02-23-2014, 12:29 PM   #3
Member
 
Join Date: Mar 2011
Location: Manitoba, Canada
Posts: 34
Black Tank Flush Check Valve - B & B Molders Model 571

Hi - I have attached photos of the above value as located in the rear bathroom vanity cabinet of my 2011 Newmar Mountain Aire - Mod 4336. B&B were true to their word and sent me a replacement at no cost. Sorry for delay in getting back with the photos.

Darrell
Attached Thumbnails
Click image for larger version

Name:	1709.jpg
Views:	1225
Size:	150.3 KB
ID:	56743   Click image for larger version

Name:	1708.jpg
Views:	1438
Size:	224.1 KB
ID:	56744  

Click image for larger version

Name:	1710.jpg
Views:	380
Size:	179.9 KB
ID:	56745  
Darrell-Ruth is offline   Reply With Quote
Old 02-23-2014, 06:07 PM   #4
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 28,427
Super job, thanks Darrell.
If and when you winterize maybe you will want to check the two lines and see if the pink stuff shows in white pipes.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 02-23-2014, 06:24 PM   #5
Senior Member
 
Join Date: Sep 2012
Posts: 4,232
That is a vacuum breaker. It lets air into the lines after you quit flushing so the water drains out and won't freeze, and also keeps any black water from backing up out the flush inlet, if it were to get that full.
So you should never get antifreeze in there.
jesilvas is offline   Reply With Quote
Old 07-11-2014, 04:59 PM   #6
Junior Member
 
caver's Avatar
 
Join Date: Nov 2002
Location: Sikeston, Missouri
Posts: 21
I found this thread after having a similar problem. Mine is on a Heartland Focus FX17.
It is also the B&B Molders unit. I had not used the tank flush since last fall. I flooded my bathroom when trying to flush the tank last month. I removed the unit and just bench tested it proving the water is primarily coming out the vent.
__________________

__________________
Vacation Gallery
caver is offline   Reply With Quote
Reply

Tags
tank



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
Fresh Water holding tank drain valve '00 fleetwood southwind 35S scooterbob Fleetwood Products Owner's Forum 12 07-27-2013 11:32 AM
Open Road 36LA Black tank smell Ewings2 Tiffin Motorhomes Owners Forum 5 07-08-2013 06:57 AM
Washing Machine Usage NukeRef RV Systems & Appliances 14 07-02-2013 10:04 AM
Should an anti-siphon valve do this? Bryan H Class A Motorhome Discussions 16 06-10-2013 12:17 PM
Black Water Tank rogo88 Class A Motorhome Discussions 13 06-01-2013 09:52 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:19 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.