Originally Posted by Grumpy
They are ABS not PVC.
X2. And when you have to do any work on ABS pipe you need cleaner and cement that works with ABS pipe too.
I just installed a blade valve on the end of my 2nd discharge and had to get ABS cleaner and cement for it. Lowes has it in stock all day long. When you apply the stuff and put your fittings together, make sure you keep pressure on the fittings for a good 30 seconds otherwise they will push themselves apart.