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Topic: anti siphon valve for the black and grey water flush (Read 1086 times) previous topic - next topic
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anti siphon valve for the black and grey water flush

Yahoo Message Number: 116857
my name is John Bennett i was very active in this forum a few years ago. I still own a 07 Magna 6751 and I really enjoy the Coach but I need help. This discussion deals with the anti-siphon valve that is part of the Black/Grey tank flush system. I noticed that when I flush the tanks I start to get water drops coming thru into the Aqua Hot bay no problem when your not flushing. I need to find where the anti-siphon valve is because I believe that is the source of the problem. I have taken everything that could possibly be covering the valve. It has to be above the tanks so I took apart every cabinet in the main salon near the Refrigerator. Today I built a platform from 3/4 Ply and 4x4's to be able to pull the refrigerator forward to check access panels behind it. by doing that I now have access to the back of the shower and the valves associated with that no anti-siphon valve. Any ideas? oh it's not under the bathroom sink either.
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Re: anti siphon valve for the black and grey water flush

Reply #1 –
Yahoo Message Number: 116860
John,

I once I owned a 2004 Allure. On one occasion when my spray nozzel clogged up I removed the piping including the nozzle all the way back to the inlet connection in the plumbing bay. On my coach it was a straight run from the inlet accriss the top of the tank with some elbows connecting to the nozzle on the side of the black water tank. There was no anti-siphon device at all anywhere including the inlet connector. I had the entire thing laying out on the lawn.

I can't speak to your Magna but there is one coach that simply didn't have one. I have no idea of why.

Just as a side point I later found that the nozzle virtually never clogged as long as I had less than a half tank of black water on board when traveling on the road. Some drilled out the nozzle holes to a bigger size. I never did that because according to my memory of high school physics that should decrease the force of the stream at each hole thus hampering the cleaning ability.

Don Seager
Former CC Owner

Re: anti siphon valve for the black and grey water flush

Reply #2 –
Yahoo Message Number: 116861
I think that anti siphon valve is just inside the facia of the wet bay. You can see them ( both black and grey) by looking thru one of the inspection covers ( I forget which one). However, if that was the leak it would drip straight down below wet bay, not above your AquaHot. Once I got really high pressure city water hook to the flush connection, and one of them leaked and the puddle was below the wet bay.

Greg
06 Magna

2006 Magna Rembrandt C13
2016 Jeep GC toad

Re: anti siphon valve for the black and grey water flush

Reply #3 –
Yahoo Message Number: 116862
if anyone is interested I finally found the anti-siphon. There are 2 one for each tank. when I built the platform and was able to move the refrigerator I found an Access panel in the floor of the platform hidden by the refrigerator. looking down there I found the 4 lines for the flush and they were routed forward. next to the refrigerator on the right is a cabinet the upper has a stained glass front the lower just a regular door those cabinets upper and lower need to be dismantled. the valves are behind those cabinets near the outside wall.
John Bennett
07 Magna 6751

Re: anti siphon valve for the black and grey water flush

Reply #4 –
Yahoo Message Number: 116863
Thanks for telling us John. Someone down the road will appreciate your efforts.

pete
2000 40' Magna Indulgence CAT C-10, #5892
Pete
 2000 40'  Magna #5892  CAT C-10