1.Part No. 711-4030, 711-4030B & Waterway 711-4030 2.Designed to fit all standard 2" spa heater assemblies, for 2" Plumbing ( Actual Measurement Across Gasket is 3" ) 3.Compatibility: Replace Gecko, Hydro Quip, Aeware, United, and most other Flow Thu components, including # 711-4030 4 piccs heater rubber gaskets 4.Applicable The following: Arctic Spa, Beachcomber Spa, Bullfrog Spa,Canadian Spa Company, Filber Spa, Coleman Spa, Catalina Spa, Jacuzzi, Hot Spring Spa, Marquis Spa, Sweet Water Spa, Thermopa Spa, Unicel Spa, Viking Spa Vita Spa, Waterway Spa, most spa pumps, spa hot tubs or heater joints to prevent leaks 5.Heater union gasket, mainly used for assembling pipe joints, pipe joints, pump wet end joints, as well as gaskets between h.
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