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Reliance

Reliance Hot Water Heater Gas Control Valve 100112336 1" Cavity Thermostat Compatible with Reliance, State, A.O. Smith, and American branded heaters

  • Based on 750 reviews
Condition: New
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Availability: 11 left in stock
Fulfilled by Plumbing Planet
Arrives Dec 16 – Dec 19
Order within 18 hours and 9 minutes
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Features

  • PLEASE PROVIDE MODEL AND SERIAL NUMBER OF YOUR WATER HEATER IF YOU NEED US TO DETERMINE CORRECT GAS VALVE PART NUMBER!
  • gas control valve is compatible with all A.O. Smith manufactured products including A.O. Smith, Reliance, State, and American branded heaters
  • Temperature control assembly 100112336 supplies the burner with gas to heat the water
  • Please be aware part may come labeled RESIDEO as there was a corporate acquisition. It is still the correct part!
  • A service technician is recommended for the repair to ensure the gas supply line is leak free

Description

Reliance 300 series, electronic gas thermostat control valve, thermostat powered by 750 millivolt generator, noticeable L.E.D. indicator light blinks 1 time at 3 second intervals during normal operation, increased temperature control and accuracy, integral spark igniter, only for Reliance standard natural gas water heaters with electronic thermostat control.

Brand: Reliance


Model Name: 300 series


Controller Type: Push Button


Special Feature: Lighted


Color: Gray


Brand: ‎Reliance


Model Name: ‎300 series


Controller Type: ‎Push Button


Special Feature: ‎Lighted


Color: ‎Gray


Specific Uses For Product: ‎Water Heater Temperature Control


Temperature Control Type: ‎automatic


Connectivity Technology: ‎Wired


Power Source: ‎750 millivolt generator


Display Type: ‎LED


Finish Type: ‎Glossy


Control Type: ‎Button Control


Control Method: ‎Touch


Connectivity Protocol: ‎BACnet MS/TP


Mounting Type: ‎None" or "Direct Mount


Style: ‎Modern


Backlight: ‎No


Part Number: ‎100112336


Item Weight: ‎1.74 pounds


Package Dimensions: ‎6.93 x 6.73 x 5.24 inches


Item model number: ‎100112336


Is Discontinued By Manufacturer: ‎No


Finish: ‎Glossy


Special Features: ‎Lighted


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: October 30, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 16 – Dec 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good Replacement, Will Insulate This Time
This control unit is exactly what was needed to get the hot water flowing again. Status light is white and brighter than the original. Followed Honeywell directions that said no pipe tape sealant on supply side. Compression fittings don’t need tape either. Leak checked and no problems. A small length of pipe screwed into the supply side makes for a convenient handle to remove the old unit and screw in the new one without damaging it. Quick and easy. Good deal. The failed unit was only 4 years old but I suspect the wild ambient temperature swings where it is installed caused the unit to fail. This time I will insulate it to make it last longer. ... show more
Reviewed in the United States on September 21, 2019 by Divo Maddie
    • Perfect Replacement
These Honeywell electronic gas control valves are designed to prevent serious malfunctions from causing major damages or fires, but the problem is when they detect a fault they may never work again. There are some hacks out there that may get the valve to working again but usually they are futile. Amazon's pricing for this gas control valve is good, considering free, fast Prime delivery. Beware, there are similar looking Honeywell valves on the market, some of which cost less, so make sure you are getting the correct part number for your hot water heater. The valve is relatively simple to change with minimal tools. Make sure you turn off and fully drain the hot water heater first. Since gas lines are involved you may want to hire a licensed plumber to install the valve, unless you are confident in your abilities, ... show more
Reviewed in the United States on April 12, 2020 by Phil B
    • Winter cold showers? No!
This replacement valve was exactly as expected. It arrived on time and as described. If you have some knowledge of water heaters and plumbing, it is fairly simple to install. There are multiple videos explaining installation. I would recommend replacing any plastic drain valves with a ball valve on the tank and replacing the pressure relief valve also while you have it drained. Both are pretty simple to do and will save you some potential trouble in the future. I would recommend purchase from this seller and the product is perfect. Cannot attest to the reliability of the valve as it has only been installed for a week or so. But, it is functioning perfectly now and at $129 and the time it took to put it in, it sure beats $600 for a new tank and the time it takes to put one of those in! ... show more
Reviewed in the United States on January 6, 2021 by Kindle Customer
    • Hot water
Works ok
Reviewed in the United States on November 1, 2025 by Tom herring
    • Lifesaver!
The gas regulator unit went out on my hot water heater. Cold showers ensued for three days! First plumber we talked to said he’d replace the whole heater only -$2K. Finally a plumber came out and said I could do this myself, he had the price list for local plumbing supply (they don’t sell these at HD or Lowes) -$350. Got right on Amazon and got this one for less than half that, delivered next day. Took longer to drain the heater than it did to install the new unit, which works great. Wish all my DIY projects had such happy ending ... show more
Reviewed in the United States on April 10, 2022 by TR
    • works good for 3 1/2 years and then it does not work.
lasted 3 1/2 years. will not longer feed gas to the pilot light when attempting to relight.
Reviewed in the United States on September 3, 2025 by G. E. Walton
    • Simple enough
It was a direct cross for our failed unit WV8840B1109 to this new WT8840B1000. New unit comes with a new compression nut and compression ferrule for the pilot light tube. I would suggest you use it. Remember the burner and pilot nut are left hand threads Tools needed: wrenches 7/8", 3/4", 7/16" and I used one adjustable wrench small tubing cutter and tread sealer. Total time took a little over an 1.5 hour mostly due to the location of the water heater. It lit the pilot light almost immediately and the burner kicked in. No gas or water leaks, will check again in the morning. ... show more
Reviewed in the United States on September 30, 2022 by Ashley M
    • Good price OEM replacement.
Saved a lot of money by replacing the control valve instead of the entire water heater. This price was good for an OEM replacement part.
Reviewed in the United States on October 6, 2024 by John Y.

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