As an Amazon Associate, we earn from qualifying purchases. A.O. Smith . 100121524 A.O. Smith . 100121524 Gallery Attributes Brand name, Manufacturer name, ManufacturerA.O. Smith Attribute00ANSI Z21.22 Attribute01, Attribute12, Attribute20No Attribute02For Sale in CA Attribute03CSA C22.1 Attribute0450 gal Attribute05Gold Series Attribute06Grey Attribute07Greys Attribute0821-3/4 in Attribute09, Attribute10FNPT Attribute1155-3/4 in Attribute13Electronic Ignition Attribute14Glass, Steel Attribute15150 psi Attribute166 Attribute17Three Phase Attribute18Electric Attribute191-1/4 in Attribute21, Voltage240V Attribute2241 - 50 gal Attribute23Tall Attribute2424 AttributeKey00ANSI Specifications AttributeKey01CARB OTC LEED Compliant AttributeKey02CEC Compliant AttributeKey03CSA Certified AttributeKey04Capacity AttributeKey05Collection AttributeKey06Color Finish AttributeKey07Color Finish Category AttributeKey08, length_Attrib, width_AttribDiameter AttributeKey09End Connection 1 AttributeKey10End Connections AttributeKey11, height_AttribHeight AttributeKey12IAPMO Listed AttributeKey13Ignition System AttributeKey14Material AttributeKey15Maximum Pressure AttributeKey16Number Of Elements AttributeKey17Phase AttributeKey18Power Source AttributeKey19Supply Pipe Connection AttributeKey20UL Listed AttributeKey21Volts AttributeKey22Water Heater Capacity Range AttributeKey23Water Heater Type AttributeKey24Watts DimensionUnitinch diameter, length, width21.75 height55.75 moq, multiple1 MPN100121524 qtyInStockCall for Availability SKU2755453 Distributor offers SellerSKUMOQIn stockMultiplePrices ferguson.com27554531Call for Availability1