A.O. Smith Signature 100 50-Gallon Tall 6-year Warranty 40000-BTU Direct Vent Natural Gas Water Heater Item #5266180 | Model #CMST17870 Fits 3/4 in

Fits 3/4 in

5/8 to 11-in arbor

Meets ASTM Standard D2564 and complies with NSF/ANSI 61 health effects requirements

cotter pin

A.O. Smith Signature 100 50-Gallon Tall 6-year Warranty 40000-BTU Direct Vent Natural Gas Water Heater Item #5266180 | Model #CMST17870 Fits 3/4 inA. O. Smith's Signature 100 Series Tall Low NOx 50 Gallon Direct Vent Gas Water Heater provides efficient, reliable hot water for households with 5+ people when sized appropriately. The environmentally friendly 40,000 BTU Low nitrogen oxide natural gas burner delivers 77 gallons of hot water in the first hour. An electronic gas valve provides precise temperature control for optimum hot water delivery without an external power source necessary. The gas