Flex Membrane Internationaloffers retrofit drain systems.
Flex Membrane International, Morgantown, Pa., offers retrofit drain systems. They are available in aluminum and stainless steel for durability. A 14- by 14-inch prepunched drain flange secures to the substrate. The systems come with a UV-resistant 10.5-inch diameter aluminum drain strainer and are available in sizes to retrofit 3-, 4-, 5- and 6-inch drain leaders.
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