Flexible PVC Pipe is ideal for recirculating water in ponds, waterfalls, and other water features. This pipe is made in the USA and is built to last. Flexible PVC Pipe is extremely durable and flexible, making installation quick and easy. For simple installation, glue into standard Schedule 40 PVC fittings using PVC pipe cement. Aquascape. PVC pipe is sun resistant, ozone resistant, and mildew resistant, providing years of trouble-free use after installation.