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Old 06-28-2015, 02:27 PM   #15
2 Rivet Member
1975 31' Sovereign
North Fort Myers , Florida
Join Date: May 2015
Posts: 38
Most of the time when the valve leaks it's due to **** stuck in between the seal and the valve. Clean the poop out with a good brush or take it apart and clean it!
Two valves are for a reason as someone else commented on. You dump the black, then gray to flush.
When at a full hook-up the valves should always be closed until they need emptied or you'll get a giant chunk of goop stuck in the tanks. Leaving a campground you should leave several gallons of fresh water in the tanks to slosh around going down the road. This will help keep your tanks clean

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Old 06-30-2015, 10:20 AM   #16
4 Rivet Member
1967 26' Overlander
Spartanburg , South Carolina
Join Date: Jan 2011
Posts: 385
Interesting comments. Our 67 Overlander has the original Thetford black tank valve which has never leaked. I agree with dbj216 that it is frustrating that standard sewer hose fittings can't be used and Thetford fittings are not always easy to find when needed. I have just learned there is an adapter you can buy that lets you adapt standard to Thetford if you have room for it but I could not find it at either WalMart or Camping World. Amazon is my next try.

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