Black tank flush.

Hi, I have tried to use the black tank flush that's fitted by FR but I only build up pressure in the pipe work. Do I have to have the foot valve in the toilet room open for it to work, there was no info on this with my Wildcat (which we have named Poddy). Any help will be appreciated as always,
life is a learning curve and
some one has to do it

Sean

Mine is just hook up and flush. I can hear the jet running or spraying as I am standing next to the camper. I don't know how well it sprays the tank, but at the very least it just helps fill it up to flush it a few times before hitting the road. I know some people have had construction debris plugging up there connection and once they took it apart and cleaned it out, it worked fine.

Tank flusher now sorted, had a debris in pipe and missing a sealing washer.
sean

Just to expand on Sean's question.When you are flushing,do you have to have the pressure regulator hooked up?

Good question... What pressure regulator? do I need one?.. Water pressure in the U.K. is somewhere between 18 and 40 psi depending where you live. I get about 30 psi at home, and that is where I'll do my black tank flush.

Sean

At 30-40psi I don't think one would even kick in. I seem to
recall a 45psi number somewhere...yep, just looked at one that's
remarkably like ours. Preset to 40-50psi per the blurb.
Having said that, we always used one. You never know what you're
going to run into and blowing out a hose/connector inside the unit
would ruin my day.

It's something we bought. To get an idea of what one looks like plug "pressure regulator hose rv" into google.

As we escort our campers to their site, we tell the ones who will hook up to our water to make sure that they have a pressure regulator. You'd be surprised at the number who say, "A what?". Water pressure here in the park is straight from the city main and it can run anywhere from 40 psi to 113 psi. I did say 113 psi, because I've seen the master gauge at the entrance to the park. That's sure to blow a fitting or two, or three.

If they don't have one we'll sell them one, or loan them one if they look sad.

I bought some adapters to permanently plumb a regulator to the city connection on the inside of the connection. I rarely use it so I always used to misplace it when I needed it. Now it's always ready for service.

jetskier wrote:I bought some adapters to permanently plumb a regulator to the city connection on the inside of the connection. I rarely use it so I always used to misplace it when I needed it. Now it's always ready for service.

That is a good idea.

As far as the black flush, is it safe to use the same pressure regulator for the fresh water hose and the black tank flush

Thanks guys,I wasn't sure if you had to have one.I do use it,but was just wondering if I had to.

Brad, I'd have one for each to eliminate cross contamination.

TC

Speaking of black tank flush, I thought I could hear my flush spraying as if it were turning. Now I hear it spraying but it no longer sounds as if it's turning. Am I confused? Does the black tank flush actually turn as it sprays? Thanks !

Some of them do spin as they flush but from what I've read, they don't spin very long before they fail and just spray in one direction. One fellow wrote (RV.net) that he was replacing his and decided to see what it would do outside the tank. The new one spun for a coup[le of minutes and locked up like his old one.
I really just want one that just sprays straight so I can aim it at the sensors in the kitchen grey tank.

Sounds like I'll leave mine alone, it sprays. Are they hard to replace? I guess you need to get to the unit from under the trailer.

My black tank flush leaked all over the inside cabinet (where it hooks up to the air aspirator) last fall when I tried to use it. The dealership where I had it serviced tested it and it worked fine for them. They asked me if I had hooked up a pressure regulator to it and I said that I had. They told me that was the problem. If the black tank flush does not get enough pressure, it will leak out of where the air is supposed to be sucked in to make like a pressure jet inside the tank. In otherwords, don't use a pressure reducer on your black tank flush!

Now this weekend is the first time I have tried to use the flush since it was tested by the dealer. It doesn't work at all. I get water to the inside connection where it is supposed to mix with air but thats it. No water sprays in the tank. Does anyone have any idea why this is? Thanks!!

Corey,

I think your dealer fed you a line. The gizmo under the sink
should be a valve to allow air in when there's no water pressure and
stop the line from siphoning from the sprayer and into your hose.
Sounds like the valve was shot/stuck and they fixed it to the point
where it would at least close under pressure, or worse yet simply
removed. While I've never put a pressure regulator on the rinse
line I probably would if I wanted to use it here at home, our water
pressure is over 75psi. The same pressures that would blow the
potable water lines will blow the rinse lines. If it doesn't
spray I'd say it's full of factory supplied gunk and now everything is
plugged up.

Just my $.02 worth.

Hmmmm ok thanks. That will really tick me off if it was a feable excuse!! I haven't been very impressed with my dealer thus far regarding warranty work. I find it strange though that my black tank flush doesn't work at all now though. I have used it about a half dozens times with no problem before. I guess I'll take it apart and have a look at it. I can't really see it being gunk though because it used to work but i guess it's worth a shot. Thanks.

I had all sorts of debris in my tank flush pipe. Every time I do work on the Cat and open a new place to check on things there is wood shavings and all sorts of other stuff lying about. The team building my Cat did not clear up after themselves that's for sure.

I hear you there. Tonight, once we arrived back home from our weekend excursion, I took the vacuum breaker/check valve off and notice that there was an arrow pointing in the opposite direction of the water flow. I turned it around and reinstalled and viola, it now works. I think its very discouraging how I take a functioning valve to the dealer to have it checked, and when I get it back, they re-install it backwards. Aren't they the pros???

ScottandGrace wrote:Some of them do spin as they flush but from what I've read, they don't spin very long before they fail and just spray in one direction. One fellow wrote (RV.net) that he was replacing his and decided to see what it would do outside the tank. The new one spun for a coup[le of minutes and locked up like his old one.
I really just want one that just sprays straight so I can aim it at the sensors in the kitchen grey tank.

I googled the brand and model number printed on the check valve for my tank flush and this is what I came up with... http://www.bandbmolders.com/files/TankFlusherInstructions2.pdf

This link also shows which model numbers are the spin type or fixed glue type. I have a 2010 model, I know there are different versions in previous years from what I have from the pictures I've seen from other forum members.

Well after reading those instructions, I am sure that all of our black tank flushers are messed up........as I don't see any of the installers at the factory taking the time to read them or follow them......lol. They can't clean up simple saw dust and debris, what makes us think they follow manufacturer's directions.

Thanks for the link BTW.