ProLine® 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater

Model XCB-40
5 out of 5 Customer Rating
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Capacity (Gallons)
Limited Tank Warranty
Height Classification
Advanced Options
Fuel Source
First Hour Rating
Maximum BTU's
Side Loop
Diameter
  • Delivers 78-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.65 Uniform Energy Factor
  • Standard atmospheric vent installation with 3" or 4" B-vent, no power required
Product Details
  • Delivers 78-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.65 Uniform Energy Factor
  • Standard atmospheric vent installation with 3" or 4" B-vent, no power required
  • Patented eco-friendly Green Choice® Gas Burner design reduces NOx emissions by up to 33% and complies with Low-NOx emission requirements
  • Push-button piezo ignitor makes lighting pilot fast & easy
  • Patented Blue Diamond® glass tank lining protects against corrosion
  • DynaClean™ automatic cleaning system protects against sediment build-up
  • Stainless steel Coregard™ anode rod protects against corrosion longer than ordinary anodes
  • Commercial-grade brass drain valve for durable and easy operation
  • 10-year limited tank and parts warranty

  • The ProLine® 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater is designed to deliver an economical performance that can lower your energy bills and also provide long-lasting value. Featuring a 40-gallon (nominal) tank and a 40,000 BTU gas burner, the XCB-40 Standard Vent delivers a first hour rating of 78 gallons and a recovery rate of 42 gallons per hour. It carries a 10-year limited tank warranty, and meets Low NOx emission requirements. This model ships with a supplied insulation blanket. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel Coregard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standard and are only available for purchase through professional wholesalers and contractors.

Specifications
Tech Specs
Nominal Gallon Capacity
40 Gallons
Rated Storage Volume
38 Gallons
UEF
0.65
Maximum BTUs
40,000
Power Source
GAS
Limited Tank Warranty
10 Years
Limited Parts Warranty
10 Years
T&P Relief Valve
TRUE
Water Connection Location
TOP
Water Connection Size
1"
First Hour Rating
78 Gallons
ASME Certified
No
Blanket Included
Yes
Destination Country
US
Flue Diameter
4.00
Fuel Source
NATURAL
Height to Gas Valve
11.00
Height to T&P
51.75
Ignition Type
Pilot with Piezo Igniter
Installation Type
INDOOR
Application
RESIDENTIAL
Product Tier
ProLine®
Shipping Height 
61.81
Shipping Length 
24.13
Shipping Width 
21.13
Side Loop
No
Dimension & Venting
Type
Water Heater
Height
58.25"
Diameter
18 in."
Shipping Weight
150lbs
Vent Type
Atmospheric Vent
Find a Replacement
Current Product
Option 2
ProLine® 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® XE Ultra-Low NOx Indoor 180,000 BTU Condensing Natural Gas Tankless Water Heater
XCB-40
ATI-340H
Rebates up to $300 +
Rebates up to $300 +
Nominal Capacity
40 Gallons
Rated Storage Volume
38 Gallons
Diameter
18 in."
Width
17.75"
Depth
21.75"
11.25"
Height
58.25"
23.625"
Shipping Weight
150lbs
70lbs
Power Source
GAS
GAS
Limited Tank Warranty
10 Years
0 Years
Limited Parts Warranty
10 Years
5 Years
T&P Relief Valve
TRUE
Water Connection Location
TOP
BOTTOM
Water Connection Size
1"
First Hour Rating
78 Gallons
Thermal Efficiency
0%
0%
All Reviews for ProLine® Atmospheric Vent (400 series)
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