Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Fleetwood Owner's Forum
Click Here to Login
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 06-28-2022, 06:20 PM   #1
Junior Member
Fleetwood Owners Club
Join Date: Mar 2018
Posts: 22
San i flush not working

2014 Providence 42P
Help is appreciated…
Looking for some past experience or knowledge.
We have a macerator toilet that the green/yellow/red indicator lights always seem to show red in a short period of time.
OK …so just go dump the tank.
For some reason, currently the red light stays on all the time.
I know we can override it and still flush the commode. But it’s a “hold the button” nine second nuisance. 
So I started to use the Sani flush option to rinse the inside of the black tank thinking the level sensors are “covered.”
Upon trying to back flush using the outside Sani flush port, no (minimal) water goes into the black tank.
I can leave the tank valve open and see a trickle of water come through the 4” output drain. (I have a clear 90)
So thinking that possibly there is a check valve in the line I have removed the utility bay compartment panel and traced the SS braided line into a blue PEX back flush line up into the wall.(see pic)
It appears this line after it leaves the utility Bay (yellow end) goes up into the bus sidewall (red arrow) makes the loop and comes back down (blue arrow) and then goes over to enter the system.
So my question is this…..
Has anyone ever had a Sani flush system quit working ?
Has anyone seen this line in the wall kink?
Any other backflow valve in the Sani flush system, if so where?
Am I mistaken in the lines that I see, and this is not a loop that goes up the bus wall?
Any help is appreciated before I cut this line and try and go direct into the tank. Lol
Attached Thumbnails
Click image for larger version

Name:	EB47D826-926B-497B-9F71-393145949D46.jpg
Views:	2
Size:	366.1 KB
ID:	369581  
dsamford is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! 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 07-03-2022, 07:14 PM   #2
Senior Member
Join Date: Oct 2018
Location: Washington
Posts: 241
I flush EVERY time I dump the black. While you drive, things splash around and it's possible that things may have gotten stuck on the nozzle.

There is likely a check valve in the line. I hunted one down in a friends unit, it was in a utility void, it was a vacuum breaker/check valve combo. It was stuck shut after lack of use. You describe it going into a wall then back down - it likely goes up there because a vacuum breaker is up there.
Consider this:
1) If the coach is not level when you use the flush, it may take a while for water level to build up and start flowing out the clear elbow.
2) with a 3/4 full black tank, you can add some cleaning solution and drive around for a while in town. Turns and start/stops should give the top of the tank a bit of a clean.
3) Visit a dump station when it's not busy, connect flush water, and bust out a lawn chair. Leave the drain open, and just let it run for a while. See what happens.
4) Flush for a bit after every tank dump in the future.
5) Find a way to locate that loop in the wall. I doubt it's kinked, but there may be a vacuum break/anti-siphon check valve arrangement in there.

Good luck!
2003 Fleetwood Discovery 39L
JohnLoves2Sk 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
San-T Flush not working Ross D Outdoors RV Owner's Forum 11 07-22-2021 01:24 PM
San-T-Flush has stopped working AllanK RV Systems & Appliances 2 04-17-2021 01:22 PM
To flush or not to flush MoePo Allison Transmission Forum 3 04-26-2019 07:33 PM
To Flush or not to Flush stevechris General Discussion 9 06-02-2016 07:29 AM
HWH Jacks working, not working and working again? Bob&Pat Winnebago Industries Owner's Forum 6 06-08-2006 04:22 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 07:47 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.