Why Does The Valterra Bladex Waste Valve Have Gaps Between The Blade And Body

Question:

Looking closely at new replacement valve and noticed that when the front and rear seals are not in place, and when the valve is pushed all the way closed, there is an air gap on sides. Surprised to see this, I guess the rubber gasket is suppose to prevent any leakage, but is this normal? I assumed the valve gate would have completely covered opening when closed. Attached photo with area highlighted, you can see air gap Im concerned about. Seems like this would lead to leakage.

asked by: Steve C

Expert Reply:

Looking more closely at the product pictures we have for the Valterra Bladex Waste Valve # T1003VP you can see the gaps in those pictures as well. It's a fairly common question with this design, but the rubber gaskets are designed to prevent leaking from the connection points of the waste valve to the flange as well as cover the gaps you're seeing when the gasket isn't in place.

expert reply by: Kevin C