Name: A.O. Smith Signature 100 50-Gallon Tall 6-year Warranty 37000-BTU Liquid Propane Water Heater
Brand: A.O. Smith
SKU: 1000550931
Price: 879 USD
Availability: InStock
Rating: 4.4 (369 reviews)

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Deliver efficient and reliable hot water for households with 5-6 people, when sized appropriately, with A. O. Smith's Signature 100 Series Tall Atmospheric Vent Liquid 50-Gallon Propane Water Heater. With an environmentally friendly 37,000 BTU gas burner, this model delivers 81 gallons of hot water in the first hour. It features an electronic gas valve that provides precise temperature control for optimum hot water delivery without the need for an external power source. For your convenience, the gas valve also includes an LED status indicator for diagnostics reporting and a push button ignition to simplify the startup process. A. O. Smith's 50-gallon propane hot water heater is designed with your safety in mind. With a built-in safety system, this model reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensures 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 6-year limited warranty to give you additional peace of mind. Call 1-877-GOLowes to get this water heater installed same day."

Delivers the ideal amount of hot water for households with 5-6 people when sized appropriately
Features a 37,000 BTU burner that delivers 81 gallons in the first hour
Electronic gas valve provides precise temperature control for optimum hot water delivery
Self-diagnostic electronic gas control incorporates an LED status indicator that monitors and reports on system operational status
Built-in safety system reduces the risk of accidental flammable vapor ignitions
Tall, slim 60.75-in H x 21-in diameter profile enables easier installation in narrow spaces
Tank Guard® provides advanced tank protection that extends the life of your gas water heater
High-altitude certified from 0 ft to 10,100 ft
Provides peace of mind with a 6-year limited tank and parts guarantee and a 1-year limited labor warranty

General
Type	Tank	Power Source	Gas
Fuel Type	Liquid propane	Use Location	Indoor
Grade	Residential	Series Name	Signature 100
Ignition Type	Piezo	Venting Type	Atmospheric
Vent Type	Type B double wall

Dimensions
Nominal Capacity (Gallons)	50	Weight (lbs.)	161
Rated Storage Capacity	48-Gallon	Width (Inches)	21
Vent Diameter(s)	3-in	Family Size	6
Depth (Inches)	21	Water Connection Size	3/4-in
Diameter (Inches)	21	Insulation Thickness (Inches)	1.5
Height (Inches)	60.75

Features
Point of Use	No	GPH Recovery at 90 Degrees F (Gallons)	41
Annual Fuel Utilization Efficiency % (Percentage)	0	High Altitude Model	Yes
Uniform Energy Factor	0.62	Installation Location	Closet
BTU Rating	37000	Pilot Light Window	Yes
Super High Efficiency	No	Pilot Reset Button	Yes
Grid Capable	No	Temperature and Pressure Relief Valve	Yes
Scale Prevention	No	Water Connection Location	Top
Foam Insulation	Yes	Water Heater Style	Tall

Compatibility
For Use with RVs	No	Works with Android	No
Works with Apple HomeKit	No	Wi-Fi Compatibility	No
For Use with Mobile Homes	No	Works with the Google Assistant	No
Works with SmartThings	No	Bluetooth Compatibility	No
Works with Amazon Alexa	No	Smart Compatible	No
Works with iOS	No

Warranty
Warranty	6-year limited

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	AHRI Certified	Yes
ENERGY STAR Certified	No	Safety Listing	CSA safety listing

Miscellaneous
UNSPSC	40101800

Check out the Best Selling Water Heaters on Lowes.com

Review

4.4 out of 5

369 Reviews

91% Recommend this product

Ratings may include incentivized customer reviews.

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+ 8

What Customers Are Saying

The water heater has mixed reviews. Many found the installation easy and were satisfied with the performance and quality. Some reported the product provided more hot water capacity and was a good value. However, some received defective or damaged units with issues like leaks or dents. A few felt the product was overpriced compared to more energy-efficient models. Overall, the water heater seems to work well for many, but there are also quality control concerns that some customers have experienced.

Customer review summary generated by AI, including incentivized reviews.

369 Customer Reviews

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Works great.

We replaced a water heater that was 30 years old and did not heat up too well. Wow, what a difference. Hot water almost instantly. Let's see how my energy bill is next.....

Mia 89August 31, 2026
Verified Purchaser

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No Meaningful Warranty

Would Not Recommend

took 6 weeks to actually get the unit delivered. I ordered the unit. It was assigned a warehouse that did not deliver to my address, I called, and it was reassigned, but it wasn't. I had to cancel the order and order again. It was AGAIN assigned to the wrong warehouse despite having my local store set as the store I was shopping online. I had to get it delivered to the store and pick it up. Upon installation it did not work. The flashing lights indicated a fault. I called A,O. Smith and got a pa...

AlexAugust 21, 2026
Verified Pro

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Response from Published by the A. O. Smith Team

We are sorry to hear of your experience. We want to ensure the issue is resolved.

Please send your phone number to talktous@aosmith.co...

Published by the A. O. Smith TeamAugust 26, 2026

Ease of installation.

Lee AJuly 20, 2026
From Signature 100 40-Gallon Tall 6-year Warranty 36000-BTU Liquid Propane Water Heater Verified Purchaser

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Propane water heater

The propane water heater works well. Easy to install. Only problem is it costs $200 more than natural gas. What a rip off from the propane association.

July 20, 2026
From Signature 100 40-Gallon Tall 6-year Warranty 36000-BTU Liquid Propane Water Heater Verified Purchaser

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New tank with a broken pressure relief valve

After installing the hot water tank, water kept coming out of the pressure relief valve. We had to go to a hardware store to purchase a new pressure relief valve and replace it. Major inconvenience and had to spend more money. Works great now.

ChristinaJuly 9, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/be4a3ab5-7c92-5caf-bad6-69059cdebd1e

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/6eb4ac30-e874-5b28-9af9-e58559c3105f

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Easy Peazy Pick-up

Would Recommend

I asked for a little Associate assistance with the transaction and "Boom". An exceptionally talented Associate jumped right in and walked me through the process of picking up my Gas Hot Water Heater. They even loaded it for me in my truck. I was then on my way. Could not have been more pleased with the process. Oh!, P.S. I got a Pro to install for me. Took about an hour. Minimum cost.

NoHotWaterJune 30, 2026
Verified Purchaser

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39 Questions

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