Here's a brief addendum to my long (sorry) description of the Rule 500 systems I installed. I experimented with two kinds of check valves and settled on a modified 1/2 inch pvc valve designed for home plumbing systems. It can be found in well-stocked hardware or plumbing supply stores. This check valve is spring-loaded and will provide a reliable barrier against back flow into the boat. The problem is that the valve is designed for an opening pressure of 200 psi. In tests, I found that the pump could handle it, but that the flow was restricted. I modified the valve by unscrewing the spring cap, cutting the spring roughly in half, bending the cut tip to fit the cap, then putting it all back together. This cut the opening pressure acceptably. *************************************************************************** PaddleWise Paddling Mailing List - All postings copyright the author and not to be reproduced outside PaddleWise without author's permission Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Wed Oct 13 1999 - 05:17:14 PDT
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