 Fernco Quick
Caps
http://www.fernco.com/plumbing/residential-plumbing/qwik-caps
Offer a quick, easy way to cap pipe ends. Made of flexible PVC, they're
suitable for above-ground or underground use, on cast iron, steel, copper or
plastic piping.
The convex face allows the cap to withstand greater pressure for testing
purposes and minimizes ballooning.
To install, simply place over open end of pipe and tighten to 60" lbs.
torque. If a Flashback were to get to the cell, this lid will blow off.
The lids are nearly a half inch thick. They can be drilled and tapped for
threading an outlet valve for your hose. Under a vacuum, this lid will flex
inward. You could minimize that by adding a hard Seal/surface between the
end of the pipe and the inside of the cap.
 
Available from Castle Wholesalers.com
 Fernco Website
(these caps are available at hardware stores) |
Hydrogengarage's way of using a plastic lid on stainless or plastic tubes.
Hydrogengarage's
way of using galvanized lid on stainless or plastic tubes.