Inquiry (采购产品): rings I am looking for a set of "rings" for a water piston. They would fit over a 3" schedule 40 pvc pipe and into a 4" schedule 40 pvc pipe. I was wanting them out of nylon or similar material. Soft rubber would have too high of a friction quotient. Also some kind of seal that would fit adround 1.5" schedule 40 pvc.If you can help or refer me to somone who can I would be very grateful. **** Hidden Message ***** Mark Domian 35234 Company: Mancha Hardscapes E-mail: mdoma2@aol.com **** Hidden Message ***** mdoma2@aol.com