[tartuffe]

Finally an advantage to having every part not part of my hull in my upstairs bonus room. Just poured water down the discharge hose on one of my bilges and it ran right through the pump (rule).

You could go with oversized check valves like I posted above or go the route of 1.5" brass for $23. Just figure the larger valve will help make up for the loss in GPM as noted above.

I will be tying 2 bilges into a 2" through hull and using the PVC valves. Figured that would save me an additional $45 stainless thru hull.