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Old 03-22-2018, 04:18 PM   #11
chartrand
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Originally Posted by Steveo57 View Post
They have a habit of leaking when flushing the black tank. Some people replace them with a better quality one.

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Iíd be interested in what you replace yours with if you do replace it.


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Old 03-22-2018, 05:19 PM   #12
BigTexRex
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I have the same unit, glade you found it! I was not sure where it was either but as I sit here typing this, Iím looking at it.

Out of curiosity... why were you trying to find it?


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I've had two bad experiences with them on other RVs so I replace it with a Watts LF288A as soon as I can. The first experience, it was installed backwards and leaked several gallons before I noticed. The second time it just leaked.
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Old 03-23-2018, 10:10 AM   #13
ChuckS
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I have never used my black tank built in flush. I installed clear backflush with gate valve and clean my tanks that way. I can see when they are clean and I donít have to worry about anti siphon valves.


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Old 03-28-2018, 01:51 PM   #14
Steveo57
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It's tucked up under the bathroom sink good. I haven't had a chance to flush my black tank yet to check it out.

I'm considering just removing it and using a backflow preventer on the hose connection at the docking station. Thats how my last camper was setup with an aftermarket flush system. I don't really see any downside to pulling it out. The only time you're hooked up to the connection is when you're flushing the tank and it's going to be empty then.

I guess if you were flushing the tank and you had the outlet closed and the tank level was covering the tank flush connection and you lost pressure in the flushing water line then you could suck something into the flush hose supply. Those are a lot of what ifs and a backflow preventer on the hose connection would serve to prevent that anyways from what I can see.

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Old 04-06-2018, 03:08 PM   #15
Emptynesters
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Are these on all RV's? I have a flush for the black tank that is on the side of my trailer that I put a hose on to clean the black tank. This is my first trailer and am looking for an ed-u-ma-k-shen??? LOL
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Old 04-06-2018, 03:21 PM   #16
chuckster57
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Any RV that has a factory installed black tank rinser will have an anti siphon valve. Itís location isnít always the same, Iíve seen them under the bathroom sink, behind the shower wall, even in a cabinet with lots of other fresh water lines.

They are there to insure the fresh water system your hooked up to doesnít get contaminated. As long as there is an anti siphon device between the black tank and the rinse water source, your good.
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Old 05-09-2018, 07:28 AM   #17
Auggie Waterman
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I must not be understanding anything here even after re-reading... OK, there's two black flush connections on the passenger side of our fifth wheel (Hideout 308bhds) toward the front. One for each black tank, has 1.5 bathrooms.

I thought a black flush would connnect to a spray nozzle of some sort inside the black tank connected to the toilet, simple. Why would there be a "anti siphon" or backflow preventer or any connection to the other clean water supplies or lines in the trailer??!
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Old 05-09-2018, 11:58 AM   #18
BigTexRex
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I must not be understanding anything here even after re-reading... OK, there's two black flush connections on the passenger side of our fifth wheel (Hideout 308bhds) toward the front. One for each black tank, has 1.5 bathrooms.

I thought a black flush would connnect to a spray nozzle of some sort inside the black tank connected to the toilet, simple. Why would there be a "anti siphon" or backflow preventer or any connection to the other clean water supplies or lines in the trailer??!
The anti-siphon is to prevent a possible back flow into the fresh water system you're using to flush the black tank. You're right, the lines do not interconnect with any other fresh water lines in your RV.
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