Speck Pumps Seal Plate [EcoM3 V] (2921116125) permacast A diffuser like this is

A diffuser like this is useful because it helps channel water properly after it leaves the impeller

or no longer fitting securely in the assembly

and this Maytronics Dolphin Supreme M5 version uses the 9995541-ASSY reference

This type of part is especially useful when the plumbing assembly remains serviceable and the issue is centered on backflow prevention or inconsistent internal movement

Speck Pumps Seal Plate [EcoM3 V] (2921116125) permacast A diffuser like this isSpeck Pumps Seal Plate [EcoM3 V] (2921116125) is a replacement seal plate for compatible Speck pump models. The seal plate provides an important mounting and alignment point between the motor side and wet end of the pump, helping support the shaft seal, impeller area, and surrounding housing components during operation. Seal plates are often replaced when a pump is being rebuilt, when the existing plate is cracked or worn, or when a leak has affected