I just decided to replace my 3 year old Dometic 300 with a 310 because every time I thought I had it fixed, another place would leak. First it was the Vacuum Breaker valve, which turned out to be fine, then it was the water valve. I got so disgusted I just ordered a new toilet that had better reviews. How important is the PSI of the incoming water? The first leaks were when we were using the onboard tank so I didn't think the PSI would be overwhelming, but now I am wondering if we should consider a pressure reducer. Please forgive my rambling, but after having that toilet in and out of the RV 3 times, I am at my wits end.