Pressure Switches

This item is a 1/8" MPT Plastic Plug which can be used to block an 1/8" MPT (male Pipe Thread) hole normally found on a Heater Tube on Hot Tubs. This hole size is the same size as a Pressure Switch hole and would measure about 3/8" wide across the hole...

You are buying a Pressure Switch RP2100 with Plastic Header that fits a Raypak Gas Heater System, 105B, 185, 130A, 207A, R185A, 1.75psi..  PRESSURE SWITCH IS A BARKSDALE (THE LITTLE GENERAL) SWITCH # MSPS-EE05-Q71 .5-5.0 PSI (8 MAX) MAX...