CMP Generic 2" Slide/1-1/2" Backwash Valve Piston Assy (25831-122-100) tecmarkcorp and this Luxury Leisure EZ

and this Luxury Leisure EZ Lifter complete version uses the 3110-03 reference

A pump like this is useful because it restores the full equipment assembly in systems where the original Executive pump needs a direct and compatible replacement

Helps maintain more consistent water level automatically

A diffuser plate like this is useful because it helps support internal flow management around the pump’s impeller area

CMP Generic 2" Slide/1-1/2" Backwash Valve Piston Assy (25831-122-100) tecmarkcorp and this Luxury Leisure EZThe CMP generic backwash valve piston assembly is designed for compatible slide valve applications where the internal piston section needs replacement. A piston assembly is useful because it helps control the internal flow path changes needed for normal filtration and backwash use, supporting dependable valve function. This replacement is especially useful when the original piston is worn, scored, sticking, leaking, or no longer sealing correctly.