2700, 2750, 2900 Main Piston Assembly for Higher Flow rates common for applications that use the 2700, 2750, or 2900 Fleck Model Valves.
Part Number for Assembly is 60090-HF, this part comes complete with seal o-ring end plug PN 40078, old part number 10234, and quad o-ring ( 10209 ).


The standard 60090 Piston Assembly can be used for most residential applications.
If your backwash rate requirements are higher than 7 gpm, or your service flow rates are higher than 12 gpm, you need to use the 60090-HF version, or performance may suffer.