- New
FP-WP100 is a winterizing bypass plate designed for compatible RV water filter housings. Made of stainless steel, it allows antifreeze to circulate through the plumbing system while bypassing the filter cartridge, helping reduce antifreeze waste and avoid saturating the filter during winterization. It fits standard 5" and 10" filter housings, with compatibility depending on the housing design. The plate includes a sealing gasket and is designed for tool-free installation and removal.