6.4GPM Outdoor Gas Tankless Water Heater SKU: 77670478 Category: Tankless Water Heater Description Additional information Description 77670478 | 6.4GPM Outdoor Gas Tankless Water Heater Additional information GPM 6.4 Type Gas Related products SKU77670232 77670232 | 6.4GPM Direct Vent LPGas Tankless Water Heater More Info Quickview SKU77671611 77671611 | 9.5GPM Outdoor Gas Tankless Water Heater More Info Quickview SKU77672687 77672687 | 9.5 Direct Vent LPGas Tankless Water Heater More Info Quickview SKU77670218 77670218 | 6.4GPM Direct Vent Gas Tankless Water Heater More Info