Heater Pressure Switch Hole Plug 1/8 Inch NPT

Heater pressure switch hole plug is 1/8 inch NPT plug used to close off the unused pressure switch hole/tap of a spa heater. 

This is usually only needed if the pressure switch is mounted external to the heater.  This is the slot version of the plug.

Plug, for Pressure Switch Hole, Nylon, 1/8"-27 NPT, Slot

Pressure switches should never be bypassed when operating a spa for safety reasons - but if the function is covered elsewhere in the spa plumbing, then this plug will cover the hole in the heater meant for a pressure switch.

69-0050B Replaces the metal plug 6000-124.

Or see stainless steel plug 47-555-1022