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Old 11-11-2020, 08:12 PM   #1
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black tank valve

any advise on leaking black tank valve ,leaks when i remove cap for waste hose,(yuck) probably have to replace.
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Old 11-11-2020, 08:46 PM   #2
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You can replace just the seals if the rest of the valve is good. Not too bad of a job. Just be sure the tank is empty.
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Old 11-12-2020, 08:36 AM   #3
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It could possibly be the valve isn't leaking, but rather several feet of piping that doesn't drain completely while dumping, mine was this way.
When ready to connect hose connect the sewer end first then while holding the hose under the cap slowly loosen it while it drains into the hose. Also a cap the the garden hose fitting on it really helps with less mess.
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Old 11-12-2020, 12:07 PM   #4
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An alternative fix.

https://www.amazon.com/Valterra-T58-...ag=googhydr-20
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Old 11-12-2020, 12:56 PM   #5
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Quote:
Originally Posted by mark5w View Post
I have one of those on my camper. I also talked my son into putting one on his too. It is a great measure to prevent unwanted surprises when removing the cap.
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Old 11-12-2020, 12:59 PM   #6
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Just be absolutely sure, add both!
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Old 11-12-2020, 01:02 PM   #7
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Quote:
Originally Posted by mark5w View Post

I have one of those critters hanging on the end of the pipe also.
If you have clearance enough for it, it's well worth the few $ they cost.
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Old 11-12-2020, 02:00 PM   #8
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Ordered one yesterday online after experiencing a "surprise" first time dumping my new Grand Design. Several owners on their forum said it's a common problem in the design of some Grand Design models' plumbing systems. All stated the Valterra T-58 solved the issue.
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Old 11-12-2020, 02:55 PM   #9
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I also have one and with the way my sewer connection is designed i have room for a clear adapter so i can see what is leaving the tank and if it still flowing.https://www.amazon.com/Camco-39572-C.../dp/B00192KZQ2
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Old 11-19-2020, 02:38 PM   #10
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Valterra Twist-On Waste Valve, Mess-Free Waste Valve for RV's, Campers, Trailers https://www.amazon.com/dp/B000BGHYJS..._8qUTFbJPERS2H
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