I just installed a new water heater, and had to run some new PVC pipe with several ell’s and a vavle, so I did at least 5 joins. The cement says 15 minitues to moveable, and 2 hours to cure before you are supposed to run water thru it. I seem to remember seeing people not wait as long to run water thru the system. I really want to get that water on before I go to bed so I can see any problems and get it hot water by morning. Help!