Outlet Temperature Sensor (AQE18) $12.50 AQUAH 12L (3.2 GPM) Natural Gas Tankless Water Heater $439.98 AQUAH 10L (2.65 GPM) Natural Gas Tankless Water Heater $199.95 AQUAH PREMIUM DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $389.95 AQUAH PLUS DIRECT VENT NATURAL GAS TANKLESS GAS WATER HEATER $599.90 AQUAH 12L (3.2 GPM) Outdoor Natural Gas Tankless Water Heater $229.00 AQUAH 16L (4.23 GPM) Natural Gas Tankless Water Heater $599.90 AQUAH 10L (2.65 GPM) Outdoor Natural Gas Tankless Water Heater $209.99 AQUAH 24 KW Electric Tankless Water Heater $279.75 AQUAH PARAMOUNT DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $409.95 AQUAH 27 KW Electric Tankless Water Heater $599.90 AQE12 Heating Element $79.50 Diaphragm (16L, Silicon Gel) $15.95 Solenoid (16L) $25.95 Blower Switch (Plus) $18.50 Water Pressure Relief Valve/Drain Plug (6L) $10.95 Diaphragm (12L, Silicon Gel) $13.50 Outlet Temperature Sensor (AQE18) $12.50 Triac B (AQE12) $25.00 Control Box (Paramount) $63.50 Water Pressure Relief Valve $10.95 AQUAH Premium Heat Exchanger A (JSG28-K) $85.00 6L Heat Exchanger (JSD12-K) $35.00 Triacs (AQS24) $29.00 Battery Holder (16L) $9.95 Gas Inlet/Valve (6L Outdoor) $14.50 Outlet Temperature Sensor (Plus) $12.50 Triac B (AQS27) $26.00 LED Display (Plus) $22.50 AQUAH Premium Heat Exchanger B (JSG28-K) $85.00 AQUAH 12L (3.2 GPM) Outdoor Propane Gas Tankless Water He $229.00 Control Board (AQE12) $24.95 AC Adapter (12L) $10.75 Outlet Temperature Sensor (Paramount) $12.50 Outlet Temperature Sensor (Premium) $12.50 Triac B (AQS24) $26.00 On/Off Switch (6L) $8.95 16L Heat Exchanger (JSD32-K) $79.50 Battery Holder (12L) $9.95 Solenoid (12L) $23.95 12L Heat Exchanger (JSD24-K) $64.95 Control Board (AQS27) $22.00 Battery Holder (6L) $9.50 Triac B (AQE18) $26.00 Fan Motor (Plus) $28.50 Outlet Temperature Sensor $12.50 Control Box (6L) $25.75 Heat Exchanger (Plus) $64.75 Water Flow Sensor (Premium, copper) $26.78