As the direct successor to the 0154F00099 gasket

meaning it will reset to its normal state once the pressure differential drops below the set point differential

compression-based seal

outdoor applications require a dedicated weather-shielded housing to prevent moisture ingress

it should be inspected and potentially replaced alongside the motor to prevent premature bearing wear

Grundfos 00519652 Flange Set 321142-301 As the direct successor toThe Grundfos 00519652 Flange Set is a professional grade 1" FNPT hardware kit engineered specifically for the Grundfos UP Series and UPS Series circulator pumps. As a veteran technician knows, using the correct bronze pump flanges is critical in open loop or potable water systems to prevent the accelerated corrosion and "red water" issues common with standard cast iron components. This GF 15 26 flange kit ensures a leak free, high integrity connection