Pressure regulator on black tank sprayer?

[Wishbone51]

I have year 2000 model Komfort TT with a built-in black tank sprayer. Works great, but water sprays out behind the white swivel hose connector causing a huge mess when I rinse the tanks, unless I hold the hose "just so".

I took the trailer in to have the connector replaced, but they said that they couldn't replicate my issue. After some discussion over the phone, it turns out that they were using an inline pressure regulator while rinsing, and said that I should always use a regulator on the sprayer.

I thought that this shouldn't be necessary, as the sprayer shouldn't be building up enough pressure to require it. Has anyone seen this before? I would think I would want max pressure to spray the tanks.

[kennethwooster]

I've hardly ever used a pressure regulator on black tank. I would change the connection and see if problems were not solved. I had a leak back toward the tank one time, but it was a fitting that had frozen. I make sure I always get the line blown out. It will freeze.

[RollandB]

In all the years I've used one I've never used a pressure regulator and have owned many Komforts. Our current is an 05 Komfort fifth wheel we purchased used. The blank tank flush didn't work at all when we purchased it so the dealer made the repair at no cost to us. The problem was the back flow device and it's worked fine since.

[Raymon]

Dave H M wrote:
I would have tried just changing the connector a long time ago.

I have not done but one or two but there was always enough slack to pull the thing out enough to disconnect it and install the new one.

The plastic connector was cracked on one of my RV's. I replaced the plastic connector with a brass connector. Remove the screws holding the round flange to the side of the RV. Gently pull out the connector. On the back will be a hose. The hose should be long enough to pull the connector out to gain access to the back of the connector. Remove the hose and install a new connector. Hope this helps.

[mgirardo]

Ours has a back flow preventer that keeps black water from flowing back into the hose. Ours does the same thing, but I wouldn't call it a mess. It just sprays a little water back.

The best option would be to disconnect from the supply first, then the black tank rinser. Or just slightly turn the hose to disconnect until water just leaks out. Eventually the pressure will relieve itself.

I don't think a pressure regulator will completely fix the problem because the pressure will still be built up once you turn the hose off. The back flow preventer creates the pressure. A pressure regulator may reduce the pressure, but the water still has to go somewhere. It can't go into the tank and it can't go back into the hose, but it has to be relieved. Or you can just remove the back flow preventer.

-Michael

[Dave_H_M]

I would have tried just changing the connector a long time ago.

I have not done but one or two but there was always enough slack to pull the thing out enough to disconnect it and install the new one.

[jandjbaums]

I installed the tornado washer and it leaks without the backflow reducer, with it on no leaks. And it does really leak without it. Different system different results.

[Wishbone51]

Bobbo wrote:
You either don't have the hose screwed tight enough to seal the hose against the washer, or you have a worn out washer.

Not the case. New washer and tight enough.. The water isn't coming out right where the hose meets the connector, it's coming out *behind* the white spinny thing. If it wasn't tight enough or the washer was bad, it would be coming out in front of it.

[filrupmark]

There is a Vacuum pressure breaker back there. Its possible that it is cracked from a freeze causing the leak.

[MFL]

I don't use a regulator on my black tank sprayer. I do check the pressure by rinsing the dump area, before hooking to my sprayer. Only once, did I notice extreme pressure, so did not turn water valve fully open. I think there is a limit to what the system, with back flow preventer could handle.

If someone is waiting, I don't usually even bother with the BTR. I'll just do it next time.

Jerry

[K_Charles]

If it leaks then it ain't right. I have used ours with a lot of pressure and it doesn't leak.

[BB_TX]

I have never used a regulator on my black tank rinse EXCEPT at two RV parks that had very high water pressure. Used a regulator for the fresh water input also at those.

[Bobbo]

You either don't have the hose screwed tight enough to seal the hose against the washer, or you have a worn out washer.

That is a classic symptom of a loose hose connection.