800-860-3577
SUMMER SAVINGS
Save throughout the site
SHOP NOW
Delivery Truck
Scheduled delivery to your door.
A scheduled delivery is available only Monday - Friday during normal business hours and used for heavy and oversized items (large TVs, large furniture and large appliances). This service does not include unpacking, plugging in, installation or debris removal. If there are any stairs leading to your delivery, please contact a sales associate for a quote.

Note: Scheduled delivery services are available to most of the contiguous United States (available in parts of Alaska and Hawaii). Call 800-860-3577 for more information.
Main Content

Reliance 40 Gallon Short Natural Gas Water Heater - 12 40 NACS

Click to sign in and save to a list or registry
Shop Reliance
Reliance Logo
Abt Model: 1240NACS UPC: 091193005750
Ship to
Your Price: $1,198
Regular Price: Comp. Value: $1,258
Special financing as low as $100/mo
Abt Credit Card
$100/mo suggested payments with 12 month special financing.
Get a decision in seconds with no impact to your credit bureau score.
or
Tank Style: Short

Under guidelines from the manufacturer, this item isn't available for purchase directly off of our website. However, we can sell this to you in our store. Call us at 800-860-3577 for specifics on this particular item!

Click to sign in and save to a list
See other products in
Quick Specs
Key Features
What We Offer
  • Height (in):  51.5
  • Diameter (in):  22
  • BTUs (Max.):  40,000
  • Gallon Capacity:  40
  • Storage Volume (Gallons):  38
  • Labor Warranty:  1 Year Limited
  • 40 Gallons Nominal Capacity
  • Electronic Gas Control Valve
  • Self-Cleaning PEX Dip Tube
  • Uses Natural Gas
  • Grey Finish
  • Free Shipping on 1000s of Items
  • Guaranteed Satisfaction
  • Life Long Customer Service

Under guidelines from the manufacturer, this item isn't available for purchase directly off of our website. However, we can sell this to you in our store. Call us at 800-860-3577 for specifics on this particular item!

Reliance 12 40 NACS 40 Gallon Short Natural Gas Water Heater

The Reliance 40 Gallon Short Natural Gas Water Heater (model 12 40 NACS) is a reliable, high-performance solution for providing consistent hot water to your home. Designed for efficiency and longevity, this water heater features a robust 40-gallon nominal capacity, making it ideal for moderate household hot water needs. Powered by natural gas, it delivers cost-effective operation while innovative features such as a self-cleaning PEX dip tube, dual anode rods, and an electronic gas control valve ensure dependable performance and help extend the unit’s lifespan. With a compact, short profile, glass-lined tank, and efficient non-CFC foam insulation, this model fits seamlessly into a variety of home installations. Enjoy the peace of mind that comes from a water heater built to maintain optimal efficiency and maintain water quality year after year.

Features

  • Up to 50,000 BTU input
  • Electronic gas control valve that provides precise temperature control and operational status
  • Self-cleaning PEX dip tube helps reduce sediment build-up and maintain efficiency
  • Glass-lined tank with dual heavy-duty anode rods to protect against corrosion
  • "Environmentally-Friendly" Non-CFC foam insulation
  • Piezo igniter allows for easy "one-hand" pilot ignition without matches
  • Factory-installed PEX polymer lined heat trap nipples
  • Factory-installed temperature & pressure (T&P) relief valve
California customers: