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Topic: Waste Tank Flush (Read 523 times) previous topic - next topic

Waste Tank Flush

I dumped the waste tank and connected a hose to the tank flush port. I waited and watched for about 5 minutes but no water was draining in the waste hose. I had the dump valve open. I was connected to city water. I wouldn't think that would make a difference. Do these flush systems get stopped up. Any ideas on what to check would be appreciated.
Thanks,
Robert
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee

Re: Waste Tank Flush

Reply #1 –
If the flush port has a backflow preventer it could get stuck.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Waste Tank Flush

Reply #2 –
When I first purchased the coach my tank flush wouldn't work. When I sort of redid my wet Bay I was able to get it running just by working on it a little bit more. I have a new flush system that I want to install but I haven't gotten around to it yet. The old one leaks to when I use it and we all know that that's not good inside the Wet Bay.
But like craneman said it's probably the backflow preventer that's causing your issue.
'99 U320 40 WTFE
Build #5462,
1500 Watts Solar 600 amp Victron lithium
2012 Jeep Grand Cherokee Overland Hemi
Instagram bobfnbw
Retired

Re: Waste Tank Flush

Reply #3 –
Thanks for the advice. I will try to take peek behind the panel for a better idea of how it is plumbed.
Robert
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee

Re: Waste Tank Flush

Reply #4 –
Just don't do what others have done: Connect holding tank flush hose and 'forget' it was filling, only to eventually overflow tank into inside of motorhome. . .

Re: Waste Tank Flush

Reply #5 –
The spray nozzle will get plugged if the tank gets filled above where the nozzle is. It can be taken out and use a small wire or drill bit to clean the holes. Not a pleasant job but I have done a lot of them while I was working. After you have had to clean one out you are more careful to not fill the black tank to the top.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Waste Tank Flush

Reply #6 –
Quote from: Barry & Cindy –
Just don't do what others have done: Connect holding tank flush hose and 'forget' it was filling, only to eventually overflow tank into inside of motorhome. . .
Well being a new Motorhome owner. I was hoping to not get myself in a non pull through situation with my toad. I checked that box already. I hope I don't check the one you mentioned. 😂
What they say in my world. There are those that have and those that will. I have lurked on this sight for over a year before purchasing a 12 year old coach. A lot of what I heard here made me rethink buying a production coach.
2008 Nimbus 342
Build# 6464
ISM 500
Allison 4000 w/retarder
2021 Jeep Grand Cherokee