The 3/8" SAE Flare side relies on metal-to-metal contact for its seal and does not require sealant

Featuring a 3/8" SAE flare by 1/4" MPT connection

this orifice is sized specifically for the higher energy density and pressure requirements of liquid propane

the microfarad (4 MFD) rating must match the motor's nameplate exactly to avoid damaging the start or run windings

McDonnell & Miller 310800 Gasket The 3/8" SAE Flare sideThe McDonnell & Miller 310800 Gasket is a critical sealing component engineered specifically for the 21 Series and 221 Series float operated water feeders. Also identified by model number 21 12, this 4 hole valve body gasket provides a high integrity seal between the valve assembly housing, the strainer body, and the feeder flange. In steam and hot water boiler applications, maintaining a leak proof connection at the make up water feeder is essential