This service kit is the inner diaphragm assembly for Jobe Topaz & Jobe mega flow valves. Manufacturer item Tpp3 & Mfp3 fits all sizes of Topaz & mega flow valves. Designed to Rebuild Topaz & mega flow valves that have been in service for some time, & the inner diaphragm has become worn or leaking. Simply remove the 6 screws from the outer diameter of the valve, pull apart the 2 valve halves, & inside is the diaphragm assembly. Fits older models as well as newer versions. Assembly comes with new filter. | Jobe Service Kit for TP/MF Valves