---
product_id: 58007944
title: "Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1\" Cavity made by Resideo"
brand: "honeywell"
price: "1285.20 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Honeywell"
url: https://www.desertcart.tn/products/58007944-reliance-water-heater-gas-control-valve-100112336-trade-number-wt8840b
store_origin: TN
region: Tunisia
---

# 1" threaded inlet/outlet 160°F max temp rating Made in USA metal build Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1" Cavity made by Resideo

**Brand:** honeywell
**Price:** 1285.20 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your hot water game with precision and durability!

## Quick Answers

- **What is this?** Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1" Cavity made by Resideo by honeywell
- **How much does it cost?** 1285.20 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/58007944-reliance-water-heater-gas-control-valve-100112336-trade-number-wt8840b)

## Best For

- honeywell enthusiasts

## Why This Product

- Trusted honeywell brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast Fix for Cold Showers:** Get back to warm showers quickly without costly full heater replacement
- • **Trusted Honeywell Quality:** OEM-grade part designed to fit AO Smith & Whirlpool heaters perfectly
- • **Durable Metal Construction:** Robust brass/stainless steel body built to last and resist wear
- • **Easy Threaded Installation:** Standard 1" NPT connections for hassle-free replacement
- • **Precision Temperature Control:** Reliable 160°F setting for consistent hot water comfort

## Overview

The Honeywell WT8840B1000 gas control valve is a high-quality, metal-constructed replacement part designed for AO Smith and Whirlpool water heaters. It supports a maximum temperature of 160°F and features 1" National Pipe Tapered threaded inlet and outlet connections for easy installation. Made in the USA, this valve ensures reliable temperature sensing and control in standing pilot systems, restoring efficient hot water flow without the expense of a full heater replacement.

## Description

The Wt8840 Series Is The Water Heater Control For Trade Use to replace WV8840 valves on AO Smith water Heaters. It Is Designed For Use In Standing Pilot Applications Using An Immersion Well For Water Temperature Sensing. Made in United States. Manufactured by Honeywell.

Review: It works and I have hot water again! - For the record, I am not being compensated in any way for this review. I'm just happy to have hot water again after more than a week of cold showers, and want to pay forward my gratitude. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). The water heater is a 40 Gallon Whirlpool N40T121-403. Using a YouTube video titled "Water Heater Gas Valve Replacement", I was able to install this unit by myself in about 90 minutes. Difficulty level 4 on a scale of 1-10 (10 being most difficult) for a person with moderate familiarity with water heaters. Kudos to desertcart and the U.S. Postal Service. This unit arrived TWO days ahead of predicted delivery. (perhaps they know that people who buy items like this are typically in a bit of a jam? We sure were. We'd been through a week of cold showers.) I write this just a couple hours after installation and am very happy. The unit works perfectly, and MUCH cheaper than buying a whole new water heater. We have hot water again! A warm shower... one of those things you don't appreciate until you CAN'T have one. PHOTO: The new unit after installation. The old unit sits beneath.
Review: Fits and matches original. 100% - Replaced Honeywell Gas Control Valve that was flashing 5 times, indicating a bad temperature sensor in the tank. The old model just had a plastic cover where the temperature sensor is located, the new one has a metal jacket over it to protect it. Just check the chart to make sure you are replacing and ordering the right part. Original Honeywell part WV8840B1041, replacement part WT8840B1000, 1" insulation tank. The new light blinks white, does not say Honeywell on the part, but looks 100% like original. I recommend threading a 4" or 8" nipple into the gas supply opening to help provide leverage when unscrewing it from the tank. Additionally, if you are getting the 5 blinking dots, indicating a bad sensor, you can fool the valve while you wait for the new one. Turn temperature knob off, disconnect either the red or white wire until the unit stops blinking. Reconnect the wire, light pilot. Once you have the one blinking light indicating a good pilot, turn temperature knob to desired heat setting. The burner will fire up and heat water to desired temperature and then the sensor will trip out again. You can do this for a day or two while you wait for your new part to be delivered. I recommend draining the tank fully, it's just easier, but takes more time. You'll need an adjustable wrench, maybe a pair of long nose pliers. And of course, pipe plumber's tape for the threads screwing into the tank and maybe some pas pipe plumber's tape (yellow) for the gas line. The total time is about an hour, most of that was waiting for the tank to empty.

## Features

- Temperature ratings: ambient-- 0 c to 60 c

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XNSV2BG |
| Best Sellers Rank | #178,799 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #337 in Water Heater Replacement Parts #28,750 in Parts & Accessories |
| Brand | Honeywell |
| Brand Name | Honeywell |
| Connector Type | Threaded |
| Customer Reviews | 4.4 out of 5 stars 1,787 Reviews |
| Exterior Finish | Brass" or "Stainless Steel |
| Global Trade Identification Number | 00085267605038 |
| Included Components | Thermos |
| Inlet Connection Size | 1 inches |
| Inlet Connection Type | National Pipe Tapered |
| Item Dimensions | 8 x 6 x 6 inches |
| Item Weight | 2 pounds |
| Item dimensions L x W x H | 8 x 6 x 6 inches |
| Manufacturer | Honeywell |
| Manufacturer Part Number | 100112336 |
| Manufacturer Warranty Description | No Warranty |
| Material | Metal |
| Material Type | Metal |
| Maximum Pressure | 5 psi |
| Model Number | WT8840B1000 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 1 inches |
| Outlet Connection Type | Flare |
| Set Name | WT8840B |
| Size | 7.7 x 5.9 x 5.4 inches |
| Specification Met | Yes, meets relevant industry standards for gas control valves in water heaters |
| Thread Size | 0.5 inches |
| Thread Type | National Pipe Tapered |
| UPC | 085267605038 |
| Unit Count | 1 Count |
| Valve Type | gas control valve |

## Product Details

- **Brand:** Honeywell
- **Exterior Finish:** Brass" or "Stainless Steel
- **Inlet Connection Size:** 1 inches
- **Inlet Connection Type:** National Pipe Tapered
- **Item dimensions L x W x H:** 8 x 6 x 6 inches
- **Material:** Metal
- **Maximum Operating Pressure:** 5 psi
- **Number of Ports:** 2
- **Outlet Connection Size:** 1 inches
- **Outlet Connection Type:** Flare

## Images

![Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1" Cavity made by Resideo - Image 1](https://m.media-amazon.com/images/I/51A7MKc4XdL.jpg)

## Questions & Answers

**Q: will this replace Honeywell model WV8840B1109 ?**
A: According to Honeywell's replacement chart, yes. This should directly replace it.
https://forwardthinking.honeywell.com/related_links/water/water_heater_valve/Installation-Manual-34-00013EF.pdf

**Q: Will this replace a wv8840b1158**
A: i have a Honeywell WT8840B1158 gas water heater 
did this part work for you

thank you jason

**Q: will this replace the wv8840c1604**
A: THis is the model I need to replace, what did you find out??

**Q: How many millivolts does this require?**
A: 750 millivolts this control works with a thermopile not a thermocouple

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works and I have hot water again!
*by P***. on December 2, 2018*

For the record, I am not being compensated in any way for this review. I'm just happy to have hot water again after more than a week of cold showers, and want to pay forward my gratitude. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). The water heater is a 40 Gallon Whirlpool N40T121-403. Using a YouTube video titled "Water Heater Gas Valve Replacement", I was able to install this unit by myself in about 90 minutes. Difficulty level 4 on a scale of 1-10 (10 being most difficult) for a person with moderate familiarity with water heaters. Kudos to Amazon and the U.S. Postal Service. This unit arrived TWO days ahead of predicted delivery. (perhaps they know that people who buy items like this are typically in a bit of a jam? We sure were. We'd been through a week of cold showers.) I write this just a couple hours after installation and am very happy. The unit works perfectly, and MUCH cheaper than buying a whole new water heater. We have hot water again! A warm shower... one of those things you don't appreciate until you CAN'T have one. PHOTO: The new unit after installation. The old unit sits beneath.

### ⭐⭐⭐⭐⭐ Fits and matches original. 100%
*by J***R on March 20, 2024*

Replaced Honeywell Gas Control Valve that was flashing 5 times, indicating a bad temperature sensor in the tank. The old model just had a plastic cover where the temperature sensor is located, the new one has a metal jacket over it to protect it. Just check the chart to make sure you are replacing and ordering the right part. Original Honeywell part WV8840B1041, replacement part WT8840B1000, 1" insulation tank. The new light blinks white, does not say Honeywell on the part, but looks 100% like original. I recommend threading a 4" or 8" nipple into the gas supply opening to help provide leverage when unscrewing it from the tank. Additionally, if you are getting the 5 blinking dots, indicating a bad sensor, you can fool the valve while you wait for the new one. Turn temperature knob off, disconnect either the red or white wire until the unit stops blinking. Reconnect the wire, light pilot. Once you have the one blinking light indicating a good pilot, turn temperature knob to desired heat setting. The burner will fire up and heat water to desired temperature and then the sensor will trip out again. You can do this for a day or two while you wait for your new part to be delivered. I recommend draining the tank fully, it's just easier, but takes more time. You'll need an adjustable wrench, maybe a pair of long nose pliers. And of course, pipe plumber's tape for the threads screwing into the tank and maybe some pas pipe plumber's tape (yellow) for the gas line. The total time is about an hour, most of that was waiting for the tank to empty.

### ⭐⭐⭐⭐⭐ Perfect replacement for WV8840B1042
*by J***A on August 16, 2019*

Fit and works perfectly for my State model GS640YBRT 300 natural gas 40 gallon water heater manufactured and installed in 2011. This Honeywell WT8840B1000 replaced the original Honeywell model WV8840B1042. In 2019 mine began to leak dribbling water from the bottom of the Honeywell gas valve itself. (Bad design Honeywell! This should never happen!) Replacing mine is just like the YouTube video others mentioned by searching: Water Heater Gas Valve Replacement. See the Q & A section and other reviews. Here's my helpful tip. The larger gas line to the burner was unbelievably tight. The whole valve flexed where I though it would break off at the part that screws into the tank, even when trying to counter by pulling the gas feed pipe on the opposite side. Solution was to gently wedge in a 5/8" thick piece of wood behind the valve against the tank. In my photo I'm holding the wrench up where the line was attached (loosen by pulling the wrench toward me). Also in the photo I cut fingers off a (blue) disposable glove and put them on the pilot and burner lines to keep them clean. Second photo is old and new valve side by side. There was a crack in the plastic sensor tip responsible for the leak. Newer improved model has metal tip. I used open end or adjustable wrenches for all the fittings. Used vice grip and robo grip pliers for removing the gas feed pipes. Test for gas leaks with soapy water in a spray bottle. Not too difficult for a do-it-yourself person. I took my time working at a slow steady pace, a few hours. The YouTube and included instructions were very helpful. I'm delighted and saved hundreds. Remember to cut off the gas feed valve and drain the tank first.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-10-17*