Speck Pumps A91 Pump Union NPT [w/o Adapter] (2500300913) mermade The multiple cartridge references give

The multiple cartridge references give this part practical value because replacement accuracy depends on matching known identifiers to the intended canister

Waterco old style OEM pump basket

and this Maytronics Dolphin magenta version uses the 6101640 reference

and TSPA applications using the 9920-400178 reference

A properly selected replacement helps preserve the intended fit and debris-handling role of the basket instead of forcing a near-fit substitute into an important protective position

Speck Pumps A91 Pump Union NPT [w/o Adapter] (2500300913) mermade The multiple cartridge references giveThe Speck Pumps A91 Pump Union NPT without Adapter (2500300913) is a replacement union fitting for compatible Speck pump installations that use an NPT style connection. This part is used where the union connection needs to be restored, replaced, or rebuilt without including the adapter. It can help address issues caused by cracked fittings, worn threads, missing parts, or leaking pump connections. A properly functioning pump union is essential for