Can't Get Greywater Tank To Drain

[dickcarl]

Working the kinks out of a new-to-us '88 Itasca.  Somewhat strangely, it has a grey water tank for the shower, and a grey water tank for the kitchen sink.  Water from the bath appears to drain into the toilet black water tank.

The shower drain 1.5" drains just fine when you open the gate valve.  So does the black water.  But the "sink" tank hasn't been draining, and I realized this when Beloved Wife pointed to 2" of grey icky water in the sink.  Tried a plunger, snake, etc.  Finally went out with the snake and found out it only went up about 3" -- right to where the gate valve was.

Is my only option to physically remove the 6-8 screws holding the gate valve together?  The handle moves in and out nicely, so I'm assuming it's come loose.  But it's VERY had to get to, wondered if there were any tricks...

[HamRad Mobile]

Good morning, DickCarl; 

     Yes, the Winnebago people did use two (2) grey water tanks in that time period.  My 1987 Winnebago Elendan WCP31RT also has two grey water tanks; a 28 gallon grey water tank for the sinks, and a 21 gallon grey water tank for the shower. 

     Unfortunately, yes, you probably will need to accept that you and the ground around you are probably going to get wet.  Not too many years ago, that was standard procedure with the grey water, but people who stayed in one place noticed that they did have a mud hole under the side of the RV after a while.  In time, they did develop the "fully self-contained" concept.  And complete replacement drain valve assemblies are available in all the common plastic pipe sizes.  Taking apart the new replacement valve assembly to apply one of the suggested valve blade lubricants might help promote longer operational life for the new valve. 

          Enjoy; 

          Ralph 
          Latté Land, Washington