Hurlcon JX air pressure switch for the JX130 and JX160 gas pool and spa heaters. The Hurlcon JX air pressure switch is a vital part in the operations of the JX gas pool and spa heaters. With out it your heater simply will not start. It is not recommended to bypass this air pressure switch, its best to replace it. Order your new Hurlcon JX heater air pressure switch today.