Holding tank flushing question

[ndnnfan]

Hi everyone --

I have a question about flushing my holding tanks.

I have an hose inlet outside next to my shore water connection to flush the holding tanks on my 2011 Jayco Greyhawk.

My questions are this:
1. Do I need to use a water pressure regulator on this connection?
2. Is there some type of check valve on this connection somewhere inside?

The reason that I ask is that when I don't use a pressure regulator (and my outdoor hose has general/average house water pressure), I get water rushing into the bathroom and out onto the floor (?). I have not been able to use the tanks flush feature because of this. I have not tried it (yet) again with a pressure regulator because I am skiddish of the water coming onto the floor in my bathroom.

Not sure if it it a leak, a bad check valve, generally too much water pressure or another problem that I don't know about.

Anyone idea?

Many thanks in advance.

[mike837go]

Originally Posted by ndnnfan

Hi everyone --

I have a question about flushing my holding tanks.

I have an hose inlet outside next to my shore water connection to flush the holding tanks on my 2011 Jayco Greyhawk.

My questions are this:
1. Do I need to use a water pressure regulator on this connection?
2. Is there some type of check valve on this connection somewhere inside?

The reason that I ask is that when I don't use a pressure regulator (and my outdoor hose has general/average house water pressure), I get water rushing into the bathroom and out onto the floor (?). I have not been able to use the tanks flush feature because of this. I have not tried it (yet) again with a pressure regulator because I am skiddish of the water coming onto the floor in my bathroom.

Not sure if it it a leak, a bad check valve, generally too much water pressure or another problem that I don't know about.

Anyone idea?

Many thanks in advance.

It's the backflow preventer/vacuum breaker. An important component that prevents the contents of a holding tank from winding up in the hose, should something happen to the pressurized water supply.

The vacuum breaker side is open. A common problem. You'll have to find the little bugger and replace it.

Or, like those of us who don't have the external flush, fill the toilet 3 or 4 times into the black tank. Drive around the block and dump. Repeat until dumped water is free of debris.

[havnfun]

Had that leaking problem in my TT after 2nd year. Was at a dump station using the back tank flush . As I walked around the back, water was flowing out under the TT. Inside, the bath was flooded, coming out into the living area. Turned out to be a bad plastic check valve. I replaced it with a better brass valve and all is good. The valve was a booger to get to but after much frustration at Jayco design engineers, I gotter done.

Happy RVing,
Jeff