Grundfos 99880042 Flange Gasket For UP & LAUP Models 2-Pack

The Grundfos 99880042 Flange Gasket F/Up & LAUP 2-Pack is a sealing component used in circulator pump assemblies within HVAC systems such as hydronic heating and chilled water circulation equipment. It operates by creating a tight seal between pumps, preventing fluid leakage at the connection point while maintaining proper system pressure. It is positioned between mating surfaces during pump installation or maintenance ensuring uniform compression when bolts are tightened. In operation, it supports leak-free circulation, stabilizes hydraulic performance, and supports maintaining efficient water flow across heating and cooling loops in the system.