The trick when connecting PVC pipe to flexible hose is to use off the shelf PVC fittings WITH (and this tid-bit is worth $$$) the Sealand 307341513 Custom Hose Adapter and double hose clamps. This is a non-ribbed barb adapter which allows for 1½ PVC fittings to be used with 1½ flexible hose. These sell for about $3.50 each, and they are worth every cent.