[NewellCrazy]

If you are "leaking" air out of the speed control muffler, I am almost totally positive that you will have the same issue when you replace it. Usually it means that air is leaking around the seals on the air cylinder for the air operated sewer valve from Dupree that it is controlling. You will have two of them. One for up and down of the cylinder. Since, they are only five bucks so it is easy to try and I look forward to you telling me I was wrong.

Fortunately you can get cylinder rebuild kits for the cylinders (I and quite a few others have done it). From Dupree Products

I had the same thing on the air slide cylinder for the bay freezer/fridge and i rebuilt the cylinder with a seal kit from SMC.

I raised my rig up today and leveled it and then turned off the HWH System.

I measured the height at all four corners and will keep measuring over the next couple of days to see if mine is fixed or not.