As an Amazon Associate, we earn from qualifying purchases. A.O. Smith . 100121366 A.O. Smith . 100121366 Gallery Attributes Brand name, Manufacturer name, ManufacturerA.O. Smith Attribute00ANSI Z21.22 Attribute01Commercial Attribute02, Attribute14, Attribute23No Attribute03For Sale in CA Attribute04CSA C22.1 Attribute0550 gal Attribute06Enamel Attribute07Gold Series Attribute08Grey Attribute09Greys Attribute1021-3/4 in Attribute11, Attribute12FNPT Attribute1355-3/4 in Attribute15Electronic Ignition Attribute1620.478 Attribute17Glass, Steel Attribute18150 psi Attribute193 Attribute20Three Phase Attribute21Electric Attribute221-1/4 in Attribute24, Voltage240V Attribute2541 - 50 gal Attribute26Tall Attribute276 AttributeKey00ANSI Specifications AttributeKey01Application AttributeKey02CARB OTC LEED Compliant AttributeKey03CEC Compliant AttributeKey04CSA Certified AttributeKey05Capacity AttributeKey06Coating AttributeKey07Collection AttributeKey08Color Finish AttributeKey09Color Finish Category AttributeKey10, length_Attrib, width_AttribDiameter AttributeKey11End Connection 1 AttributeKey12End Connections AttributeKey13, height_AttribHeight AttributeKey14IAPMO Listed AttributeKey15Ignition System AttributeKey16MBH AttributeKey17Material AttributeKey18Maximum Pressure AttributeKey19Number Of Elements AttributeKey20Phase AttributeKey21Power Source AttributeKey22Supply Pipe Connection AttributeKey23UL Listed AttributeKey24Volts AttributeKey25Water Heater Capacity Range AttributeKey26Water Heater Type AttributeKey27Watts DimensionUnitinch diameter, length, width21.75 height55.75 moq, multiple1 MPN100121366 qtyInStockCall for Availability SKU2753194 Distributor offers SellerSKUMOQIn stockMultiplePrices ferguson.com27531941Call for Availability1