Heavy-Duty Auto-Fill Water Leveler Float Valve (3/8") – Replacement-Compatible with 25504-000-400 Pool & Spa Applications

Not a “plug and play” part but works

It does require some tinkering to make it work. No good way to seat it easily, there is no part of the body that has sized nut to grab it with a wrench (housing is round) makes it easy to break the housing if not careful. Arm is just a bit short for the float , need to attach extra length