Pentair Black Union Nut 2-1/2" | WhisperFlo XF / IntelliFlo XF Pump | 411000Z Throw Ropes Reemay 2033 Pleat Count 251

Reemay 2033 Pleat Count 251 Top Cap: open w/ molded gasket

It tests for essential parameters

Replacing the regulator valve and cap as a matched set restores the correct suction cycling that keeps the cleaner moving effectively along pool surfaces

Apply PTFE thread tape counter-clockwise (wrapping right to left on the threads) when reinstalling to ensure the tape seats correctly rather than unwinding during installation

Flow director

Pentair Black Union Nut 2-1/2" | WhisperFlo XF / IntelliFlo XF Pump | 411000Z Throw Ropes Reemay 2033 Pleat Count 251The Pentair 411000Z is the OEM replacement 2 1 2" union nut for the WhisperFlo XF and IntelliFlo XF Variable Speed Pumps, finished in black. What It Does This union nut secures the pump union connection, maintaining a leak free seal between the pump and plumbing. A cracked, stripped, or missing union nut compromises the union joint, leading to leaks at the pump inlet or outlet. Replacing it with the correct OEM part restores a proper, pressure rated