Pentair Max-E-Therm 333 Air Orifice Kit (77707-0112) gfci A dirt catcher helps intercept

A dirt catcher helps intercept debris within the filter system and supports cleaner internal operation

Pool Tool part 112S for easy ordering

The Hayward volute is designed for compatible Matrix SP1591

For spas using the E3 Mini Value configuration

and this generic version uses the O-101 reference

Pentair Max-E-Therm 333 Air Orifice Kit (77707-0112) gfci A dirt catcher helps interceptKeep the repair centered on the right component with this Max E Therm 333 Air Orifice Kit. It is used in the heater combustion system to help meter the air path for the correct burner configuration. Because orifice sizing affects how the heater breathes and fires, this is a precision replacement part rather than a generic fitting. Before installation, verify part number 77707 0112, equipment series, and any size or voltage details shown in the product