Control Box (6L) $25.75 6L Heat Exchanger (JSD12-K) $35.00 Battery Holder (6L) $19.00 Diaphragm (6L, Silicon Gel) $21.00 Diaphragm (6L, Rubber) $8.95 Output Temperature Sensor (6L) $9.95 Water Inlet (6L) $9.95 Water Valve Assembly (6L) $39.95 On/Off Switch (6L) $8.95 Gas Inlet (6L) $14.50 Solenoid (6L) $23.95 Mirco Switch (10L) $11.95 Water Inlet (16L) $9.95 AQUAH 10L (2.65 GPM) Outdoor Propane Gas Tankless Water Heater $209.99 Water Oulet (AQE12) $12.00 Solenoid (6L Outdoor) $23.95 6L Heat Exchanger (outdoor) $29.00 AQUAH 24 KW Electric Tankless Water Heater $279.75 AQUAH 12L (3.2 GPM) Liquid Propane Gas Tankless Water Heater $219.00 AQUAH 27 KW Electric Tankless Water Heater $299.95 AQUAH 16L (4.23 GPM) Propane Gas Tankless Water Heater $299.95 AC Adapter (16L) $10.75