PSH - Impeller Nut & Washer for ND.1 Pool Pump (Pack of 4) - 4211051R

PSH – Impeller Nut & Washer for ND.1 Pool Pump (Pack of 4)

This genuine PSH spare part is the impeller nut and washer set (exploded-view position 207) for the PSH ND.1 pool pump. The nut and washer work together to secure the impeller firmly to the pump shaft, ensuring correct rotational alignment and preventing play or vibration during operation. Supplied as a pack of four, this kit covers a full service job or provides handy spares for workshop stock.

Compatibility

Designed exclusively for the PSH ND.1 pool pump manufactured up to and including 2018. Because the transition from the ND.1 to the ND.2 platform was gradual, the impeller fixing hardware — comprising the impeller, key, nut, and washer — differs between generations. Always verify your pump’s manufacture year using the lot number on the motor nameplate before ordering, as post-2018 and ND.2 variants use a different fastener configuration.

Why Genuine Matters

Correct torque retention depends on precise thread pitch and washer geometry matched to PSH’s original engineering tolerances. A non-genuine or incorrect nut can work loose under the hydraulic loads of continuous pump operation, causing impeller damage or shaft wear. Choosing an authentic PSH part guarantees the fit and clamping force specified for this pump.

Installation

Replacement of the impeller nut and washer requires draining and disassembling the wet end of the pump. Cross-reference position 207 in the PSH ND.1 exploded-view diagram to confirm correct placement. Professional installation by a qualified pool technician is recommended to ensure proper torque and safe reassembly.