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Old 09-26-2015, 10:53 AM   #11
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Would banging the thing possibly get it to work? I'll try that today.
Banging it might very well work, but you should try doing it first with no water pressure and then with water pressure. I am a plumber and I know that a swift whack with the jaws of a Channellock is the remedy to many problems.

Bruce
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Old 09-26-2015, 12:24 PM   #12
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So on a sunseeker the water for the black flush enters from the outside of the coach, goes to a vacuum break somewhere in the coach and then back to the black tank?

Well you got me to walk out in the rain. The B&B manufactured inlet for the black water flush is identical to the external (park) water inlet product. I am still betting that the back flow check valve for the black water flush is just behind the three screws holding it to the exterior coach wall. Why would FR do more than required? That alone is whole new thread...

I am not a plumber so is the vacuum relief and back flow preventer the same thing?

or am I (punch line here) all wet.....
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Old 09-26-2015, 12:33 PM   #13
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In simple terms YES. There is a valve in the black vacuum valve that can stick.
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Old 09-26-2015, 12:37 PM   #14
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B&B inlet

B&B inlet
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Old 09-26-2015, 12:45 PM   #15
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Originally Posted by Hoglou View Post
So on a sunseeker the water for the black flush enters from the outside of the coach, goes to a vacuum break somewhere in the coach and then back to the black tank?

Well you got me to walk out in the rain. The B&B manufactured inlet for the black water flush is identical to the external (park) water inlet product. I am still betting that the back flow check valve for the black water flush is just behind the three screws holding it to the exterior coach wall. Why would FR do more than required? That alone is whole new thread...

I am not a plumber so is the vacuum relief and back flow preventer the same thing?

or am I (punch line here) all wet.....
Yes, the connection for the BT clean out looks identical but there is no check valve behind it. Only heard of one unit that had both the inside and outside check valves (I think it was a manufacturing mistake). There is not supposed to be 2 check valves in series for the BT clean out. See a previous post with image and read verbiage on that sheet. I have looked at other companies that make BT clean outs for rv manufacturers and they all say the same thing. The install is dictated by IAPMO TSC 27 if done by an rv manufacturer. A backflow preventer may not be vented to the atmosphere but a vacuum relief valve will be vented to the atmosphere. Our BT check valves are a combination of a spring loaded back flow preventer and a mechanical shut off plunger vented to the atmosphere which allows it to seal off the input side once the pressure is removed. The terms are all used interchangeably because the function is the same but in reality how that function is accomplished could be very different.
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Old 09-26-2015, 12:59 PM   #16
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If you have stinkbugs in your area - our previous Heartland twice had the check valve clogged by stinkbugs! When we went to get a new valve, another customer came in with a "broken" check valve. We tapped it on the counter and a stink bug fell out! Our check valve was behind the shower controls. As an aside, one year when I started the water heater, it started smoking - the entire gas line was filled with stink bugs and they caught on fire! We had installed all of the bug screens as an extra precaution on the vents but they can squeeze in anywhere.

PS - We are much much happier with our Forest River Rockwood Windjammer!
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Old 09-26-2015, 01:11 PM   #17
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Great info about the valve.

Thanks!
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Old 09-26-2015, 01:13 PM   #18
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CLR fixed my clog. Poured it into hose until hose was full and pushed it in with water.

Worked really quickly

Bill
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Old 09-26-2015, 01:52 PM   #19
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" I am still betting that the back flow check valve for the black water flush is just behind the three screws holding it to the exterior coach wall. Why would FR do more than required? That alone is whole new thread..."

Wouldn't that be nice. However the flush (behind the three screws) connects to a verticle tube that runs up to the very back of the sink, connects to the backflow valve, then another tube runs down to the black tank. Other water lines were installed in front of the valve, making it inaccessible. A horrible design. Shame on Forest River!
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Old 09-26-2015, 06:14 PM   #20
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I think I found my next mod...
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