Customer wanted put a back-up electric sump pump in a narrow pit.
There was no room in the sump pit to fit in bricks to raise the back-up pump off the pit bottom.
So we hung the secondary pump from a pipe and chain 8 inches above the float of the main sump pump.
Measure the PVC pipe of the back-up pump.
Connect the check valve with couplings.
Glue Y to connect with the discharge line and with the main sump pump line.