Pentair Sta-Rite MasterTemp 250 LP Orifice (460740) intermatic and this generic version is

and this generic version is sized with a 12 inch inside diameter and a substantial 7/16 inch cross-section using the O-99P reference

and the way internal components stay protected during cleaner operation

For larger Hayward cartridge filter systems

secure step surface on compatible pool access equipment without replacing the full ladder

That helps restore system performance with a direct-fit replacement rather than broader equipment changes

Pentair Sta-Rite MasterTemp 250 LP Orifice (460740) intermatic and this generic version isThe LP orifice for MasterTemp 250 heaters supports proper propane fuel delivery within the combustion system. A correctly matched orifice is essential when servicing fuel components or completing LP related repairs. This part helps maintain the intended gas flow for the 250K heater platform, which supports stable ignition and efficient heat production when installed correctly. Gas components should always be handled with care by qualified service