I have a new anti-siphon valve on order from Lakeview RV supply in Texas. I noticed water pouring from around the two cold water lines leading up thru the basement into the cabinet below the bathroom sink. I'm hoping the check valve is the culprit altho the valve itself looks fine. Maybe they just get hung up and let water and don't let the water bypass to the tank. I realize there have been threads regarding cutting the valve out and using two 90's and a section of 1/2" pex clamped in place, but the dealers have said NO it's not advisable. Don't mind the ramblings. I guess I'm just thinking aloud here.
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2010 Cedar Creek 5th Wheel 34SATS "The Beast"
2006 Ford F350 Lariat 6.0L Diesel
2003 Harley Heritage Softail "Hogzilla"
1986 Marriage to "Wifey" (patience of a saint)
To (Eliminate Floods Inside) your RV from these (Cheap made/not price Backflow/Check valves), replace with (flow thru fitting)! Now just use a (Screw on garden hose backflow adapter on the (OUTSIDE) hose fitting, (The one that says-BLACK TANK FLUSH)! Now when and if it LEAKS,(Who cares) its OUTSIDE! Your unit your choice? Youroo!!
So.... You are saying remove the valve from under the sink and connect the 2 pipes together with an "elbow"????
Then use what type of exterior valve?
Do you have a pic and a link to a suitable replacement?
Thank you,
crunchman
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2017 Salem Villa Estate 395RET-
2011 Coachmen Freedom Express 295RLDS- Sold
2015 F-250 FX4
To (Eliminate Floods Inside) your RV from these (Cheap made/not price Backflow/Check valves), replace with (flow thru fitting)! Now just use a (Screw on garden hose backflow adapter on the (OUTSIDE) hose fitting, (The one that says-BLACK TANK FLUSH)! Now when and if it LEAKS,(Who cares) its OUTSIDE! Your unit your choice? Youroo!!
Just never drive with the black tank fluid level above the turbo nozzle.
One of the reasons it is a vacuum break in addition to a check valve is the "Anti-Siphon" part of its name.
If the outside cover should leak or come off, the wind flowing over the hose connection will create a Venturi suction and actually suck the black water out of your tank and down the side of your camper.
The Vacuum break will allow cabin air to enter the pipe to the outside to prevent that.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
So.... You are saying remove the valve from under the sink and connect the 2 pipes together with an "elbow"????
Then use what type of exterior valve?
Do you have a pic and a link to a suitable replacement?
Thank you,
crunchman
You of course can do what you want, but I would spend the 40 bucks and get a correct replacement.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
I just use the external. Had one leak in wall, and 2 under bathroom sinks. Our SB did it first use. I've cut every one of them out as they are garbage. Not worth the risk. The ones you can put at the external inlet can be found at lowes or HD.
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__________________ John and Rebecca Dickson Emma-7 / Little John-5 / Iva-1 Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8) At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.
Just never drive with the black tank fluid level above the turbo nozzle. One of the reasons it is a vacuum break in addition to a check valve is the "Anti-Siphon" part of its name. If the outside cover should leak or come off, the wind flowing over the hose connection will create a Venturi suction and actually suck the black water out of your tank and down the side of your camper. The Vacuum break will allow cabin air to enter the pipe to the outside to prevent that.
Lou, you are confusing this redneck, my black tank flush is above the black tank and has a back flow preventer on it. Does the black tank roof vent prevent the syphon?
So.... You are saying remove the valve from under the sink and connect the 2 pipes together with an "elbow"????
Then use what type of exterior valve?
Do you have a pic and a link to a suitable replacement?
Thank you,
crunchman
Look up (Valtera Hydroflush) they have the garden hose anti-siphon valve (pictured). I found mine at a Hardware store. I also have (Male threaded Plugs) on ALL of my outside fittings,the (Rubber Push Caps) are a Joke,and to keep Clean! Youroo!!
What I was always thinking. When you consider the tiny jet holes, location of the nozzle in the tank, the vent, routing or our pex (above tank level after nozzle), there is just no real way it'll siphon. Been gutting them for 7 campers and never a problem, even without the external anti siphon valve.
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__________________ John and Rebecca Dickson Emma-7 / Little John-5 / Iva-1 Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8) At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.
Same way here,but the screw on/off (Anti-siphon Valve) is just for (Compliance to Pluming Codes)? Youroo!! I have never had or seen (Black Crap) running down the side of a RV flush port,that was PROPERLY installed above the Black tank! Youroo!!
I ended up ordering mine directly from the manufacturer, Lakeview RV Supplies. $35 including UPS shipping. It solved my leakage problem but as others have stated, they've replaced more than one. Next time around maybe I'll try the chop N' drop and be done with it.
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2010 Cedar Creek 5th Wheel 34SATS "The Beast"
2006 Ford F350 Lariat 6.0L Diesel
2003 Harley Heritage Softail "Hogzilla"
1986 Marriage to "Wifey" (patience of a saint)
Lou, you are confusing this redneck, my black tank flush is above the black tank and has a back flow preventer on it. Does the black tank roof vent prevent the syphon?
They are talking about removing the vacuum break and only using a check valve at the outside connection when flushing. The roof vent will not prevent a siphon if the water gets into the hose while traveling wind can siphon the water out just like it sucks the water through the fresh tank vent.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
They are talking about removing the vacuum break and only using a check valve at the outside connection when flushing. The roof vent will not prevent a siphon if the water gets into the hose while traveling wind can siphon the water out just like it sucks the water through the fresh tank vent.
First off the backflow preventer has nothing to do with vacuum. It is basically a mechanical stopper switch that is spring loaded to the reverse flow (closed) position and is only actuated to allow flow in only one direction when pressure (water/air) is applied against the spring which is attached to the stopper. If the above statement was true I believe the Turbo Flush aftermarket system would not work. It does work, I have used it. The factory installed system routes the tubing up into the interior of the unit (mine is routed at least 5 feet above the black tank) where the backflow preventer is installed (don't think the preventer is required in my installation with the routing of the tubing being as is). The fresh water tank will syphon as stated but it is the vent that the syphoning takes place (tank is otherwise a closed system). A simple loop in the vent tubing stopped this in my coach. There is, to me, much a do about this subject and a lot of it is urban legend and speculation and I'm probably guilty of enhancing that myself. Anyway, I think I am correct with my input. Maybe not. I'm done.