On my 2005 Dutchman trailer, I noticed a microcrack in the 1-1/2" pipe at the bypass valve right where the pipe is glued to the valve. It was impossible to repair, so I ordered a new valve. Thanks to Valterra for not changing the design. Fits the current one perfectly. I was able to reuse a 3" flange that was glued to a 3" drain pipe from a black water tank. Me used a new piece of 1/2" pipe eight inches long and attached it to the existing pipe with a band seal coupler. The repair didn't take long at all.