A.O. Smith Signature 300 40-Gallon Tall 12-year Limited 40000-BTU Natural Gas Water Heater

Ships from manufacturer
Saber's: Item #839885 | Model #G12-CADT4040NV
Special Order Regular price £902.00 inc. VAT

Ships in 1–5 business days

This product is dispatched directly by the manufacturer. Please allow additional time for supplier processing.

Estimated delivery Calculating delivery estimate… Estimated arrival is generally within 1–10 business days.
1–10 Business Days

Delivery dates are estimates, not guarantees. Timing varies by manufacturer processing, order time, destination ZIP code, weekends, holidays, weather, inventory availability and carrier conditions. Tracking is provided after the manufacturer dispatches the order.

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A. O. Smith's Signature 300 Series 40-gallon gas water heater provides reliable hot water for households with 3 to 4 people when sized appropriately. With an environmentally friendly 40,000 Btu/h Low-NOx gas burner, this flue damper model delivers 80 gallons of hot water in the first hour. This water heater does not require external power and is as simple as a standard atmospheric model. The automatic damper prevents cool air from traveling through the flue in standby mode to maintain overall heat and efficiency. The natural gas hot water heater is built with safety in mind. It has a safety system that reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensure safe operation. This model is built to last. It features Tank Guard® which is designed to provide ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 12-year limited warranty for additional peace of mind.
  • Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately

  • Fitted with an automatic flue damper that opens and closes automatically to increase efficiency and reduce heat loss in standby mode

  • Simple installation that uses standard 3-in or 4-in vent ducting and requires no power

  • Features an environmentally friendly 40,000 BTU low NOx gas burner that delivers 82 gallons in the first hour

  • Tank Guard® provides advanced tank protection that extends the life of your gas water heater

  • Tall, slim 62.5-in high x 20-in diameter profile enables easier installation in narrow spaces

  • High-altitude certified from 0 ft to 10,100 ft

  • Provides peace of mind with a 12-year limited tank and parts guarantee and a 3-year limited labor warranty

Dimensions
Diameter (Inches)

20.0

Rated Storage Capacity

38-Gallon

Family Size

4.0

Vent Diameter(s)

3-in; 4-in

Height (Inches)

62.5

Water Connection Size

3/4-in

Insulation Thickness (Inches)

2.0

Weight (lbs.)

135.0

Nominal Capacity (Gallons)

40



 

 

Features
BTU Rating

40000

Pilot Reset Button

Yes

Emission Rating

Low NOx

Point of Use

No

Foam Insulation

Yes

Temperature and Pressure Relief Valve

Yes

For Use with Mobile Homes

No

Uniform Energy Factor

0.68

Fuel Type

Natural gas

Use Location

Indoor

GPH Recovery at 90 Degrees F (Gallons)

40

Vent Type

Type B double wall

Grade

Residential

Venting Type

Atmospheric

High Altitude Model

Yes

Water Connection Location

Top

Ignition Type

Piezo

Water Heater Style

Tall

Pilot Light Window

Yes


  • Type Water Heater
  • Vendor A.O Smith
  • Saber's Item #839885 | Model #G12-CADT4040NV
  • Barcode 035505167668
  • Dimensions Diameter (Inches)
    20.0
    Rated Storage Capacity
    38-Gallon
    Family Size
    4.0
    Vent Diameter(s)
    3-in; 4-in
    Height (Inches)
    62.5
    Water Connection Size
    3/4-in
    Insulation Thickness (Inches)
    2.0
    Weight (lbs.)
    135.0
    Nominal Capacity (Gallons)
    40
  • Specifications BTU Rating
    40000
    Pilot Reset Button
    Yes
    Emission Rating
    Low NOx
    Point of Use
    No
    Foam Insulation
    Yes
    Temperature and Pressure Relief Valve
    Yes
    For Use with Mobile Homes
    No
    Uniform Energy Factor
    0.68
    Fuel Type
    Natural gas
    Use Location
    Indoor
    GPH Recovery at 90 Degrees F (Gallons)
    40
    Vent Type
    Type B double wall
    Grade
    Residential
    Venting Type
    Atmospheric
    High Altitude Model
    Yes
    Water Connection Location
    Top
    Ignition Type
    Piezo
    Water Heater Style
    Tall
    Pilot Light Window
    Yes
  • Weight 135 lb
  • Color/Finish Gray
  • Returnable Non-Returnable
  • Warranty 12-Year Limited
  • Saber Sales Exclusive No
  • CA Residents Prop 65 Warning(s) Yes

All special orders take about 1-7 business days to process and ship out.

Your order will be packaged with care and discretion. Items are securely wrapped to prevent shifting while in transit.

Orders Over A Certain Weight Are Subject To Pallet Deliveries Which Could Be Subject To Higher Shipping Costs, However Shipping Speeds Remain The Same. Depending On Location.

When your order is shipped, you will receive an email notification which includes a tracking number.

Saber Sales Exclusive: No

  • Weight 135 lb
  • Warranty 12-Year Limited
  • CA Residents Prop 65 Warning(s) Yes

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Special-order product information

Ordered for you directly from the supplier

Special-order and preorder products are not handled exactly like standard stocked merchandise. Review the process, estimated timing and product details before placing your order.

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Special Order / Preorder

A.O. Smith Signature 300 40-Gallon Tall 12-year Limited 40000-BTU Natural Gas Water Heater

This item is ordered, allocated or dispatched specifically for your purchase. Supplier availability and processing must be confirmed before shipment.

Brand: A.O Smith Product type: Water Heater SKU: Item #839885 | Model #G12-CADT4040NV Status: Special order Online availability: Available to order

Processing Time

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Typical special-order timeline

This is a general process overview, not a guaranteed delivery schedule. Product-specific estimates shown above the Add to Cart button take priority.

Stage 1 Order received

Your payment, billing and delivery details are submitted for processing.

Stage 2 Availability confirmed

The supplier confirms inventory, allocation or expected availability.

Stage 3 Packed and dispatched

The product is prepared for parcel, freight or another applicable delivery method.

Stage 4 In carrier transit

Tracking becomes available and the carrier begins final transportation.

Special-order questions

Is the item already in a Saber Sales warehouse?
Not necessarily. A special-order item may be sourced or shipped directly from a manufacturer, distributor or another fulfillment location after the order is placed.
Is the processing estimate a guaranteed delivery date?
No. Processing time describes how long the supplier may need before shipment. Carrier transit time begins afterward. Supplier, inventory, weather and carrier delays can affect the final delivery date.
When will I receive tracking?
Tracking is normally issued after the supplier or fulfillment location has prepared the order and the carrier has accepted the shipment.
Can I cancel a special order?
Contact Saber Sales immediately. Cancellation is not guaranteed after supplier processing begins. Fees or restrictions may apply depending on the item and order status. Review the Refund Policy.
Can a special-order product be returned?
Return eligibility depends on the individual product and current policy. Some items may be returnable while others may be final sale, subject to restocking fees or require return shipping. Review the product details and Refund Policy before ordering.
What happens if the supplier cannot fulfill the order?
Saber Sales may contact you with updated availability, a revised timeline, an alternative option or additional instructions. Do not schedule installation until the product has arrived and been inspected.
Can I request a quote for multiple special-order products?
Yes. Add the products and quantities to your cart and follow the instructions on the Quotes page. Quote pricing does not guarantee inventory reservation.
Should I schedule an installer before delivery?
No. Wait until the complete product has arrived, been inspected for damage and confirmed to match your order before scheduling installation.
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Verify the item before placing your order

Special-order products may begin supplier processing shortly after purchase. Confirm the manufacturer, model number, size, finish, voltage, fuel type, pack quantity and other specifications before ordering. Do not rely only on the product image. Contact Saber Sales before checkout when any specification is unclear.