Dayton 21R871 Booster Pump Flange Kit 1-1/4 NPT SS

Flange Kit for Booster Pumps

This Dayton 21R871 flange kit provides a 1-1/4 inch NPT connection for compatible booster pumps. It is built from stainless steel and rated for potable water systems. The four-hole mounting pattern secures the flange to the pump housing. Installers use it to join pipework to the pump inlet or outlet.

Replaces Worn or Mismatched Flanges

The kit suits Dayton booster pumps including models 5UWK1, 5UWK3, 5UWK5, 5UWK7, 5UWK9, 5UWL2, 5UWL3, 5UWL4, 5UWL5 and 5UWL6. It is worth fitting when the original flange is corroded, cracked or has stripped threads. The stainless construction resists the scaling that shortens the life of plated steel flanges.

Holds Seal Under Continuous Pressure

Stainless steel maintains its dimensional stability when the pump cycles on and off throughout the day. The NPT threads stay tight without the relaxation seen in softer metals under sustained load. The material also resists the pitting that can start at the waterline during long idle periods. Buyers needing a flanged connection for a different pipe size cannot use this kit.