Hayward Matrix SP1591 SP1592 SP1593 Volute (SPX5500A) duraplastic A part like this is

A part like this is useful because it restores the core rotating water-moving section of the pump

When a visible jet starts looking tired and losing directional precision

functional

Reduces plumbing stress

It is a solid service option when you want to restore proper actuation behavior while staying close to the original configuration

Hayward Matrix SP1591 SP1592 SP1593 Volute (SPX5500A) duraplastic A part like this isThe Hayward volute is designed for compatible Matrix SP1591, SP1592, and SP1593 pump applications where the main wet end housing needs replacement. A volute like this is useful because it forms the chamber around the impeller and helps direct water through the pump, making it essential to hydraulic performance and structural integrity. This replacement is especially useful when the original volute is cracked, warped, leaking, or otherwise too damaged