Metric BSP G 1/2" Female to NPT 1/2" Male Pipe Coupling Coupler $12.50 Water Pressure Relief Valve $10.95 Triac B (AQS24) $26.00 Outlet Temperature Sensor (Plus) $12.50 10L Heat Exchanger (JSD20-K) $59.87 LED Display (Plus) $22.50 AC Adapter (16L) $10.75 Heat Exchanger (Plus) $64.75 Blower Switch (Plus) $18.50 Control Box (16L) $29.95 Water Flow Sensor (AQS24) $55.00 Mirco Switch (12L) $11.95 Solenoid (12L) $23.95 Battery Holder (12L) $9.95 Outlet Temperature Sensor $25.00 AC Adapter (12L) $21.50 Output Temperature Sensor (12L) $9.95 AQE12 Heating Element $79.50 12L Heat Exchanger (JSD24-K) $64.95 Outlet Temperature Sensor (AQE12) $12.50 Water Valve Assembly (12L) $42.95 Control Board (AQS27) $22.00 AQE27 Heating Element $270.00 Output Temperature Sensor (10L) $9.95 Battery Holder (10L) $9.95 Triacs (AQS27) $29.00 Control Board (AQS24) $22.00