Product Description
4.0kW heater assembly with pressure switch for Master Spas. Part # X801100
v/n 50143
X801100
4.0kW Heater w/ Pressure Switch
You should see "50143" on the silver label on the old heater
Master Spas recommends this part as replacement for:
NLA X801701 - 4.0kW Heater Assembly w/ Pressure Switch