W3SP1592 vs SP1592: Are They the Same Hayward Pump?
Back to my Hayward SP1592 ownership story
Short answer: yes, for replacement-shopping purposes the W3SP1592 is Hayward’s online SKU replacement for the SP1592. Retailer documentation for the W3 model explicitly identifies it as the direct replacement for SP1592.
Why are there two model numbers?
Hayward has used W3-prefixed model numbers for products sold through online channels. That can make an old equipment label and a current product listing look like two different pumps even when the current W3 listing is the replacement for the older number.
What specs should still match?
The current W3SP1592 listing is a 1 HP, single-speed, 115V Power-Flo Matrix pump with 1-1/2-inch ports. Those are the details I would compare against the old pump and plumbing instead of relying only on the similar name.
Can I replace an SP1592 with a W3SP1592 without measuring anything?
I would still verify the installation. Model continuity is helpful, but an older pool may have adapters, altered plumbing, a replacement motor, or other changes made over the years. Check voltage, plumbing, discharge orientation, and available space.
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If you are checking the exact pump, this is the Hayward SP1592 / W3SP1592 listing I bought from.