Best Honeywell Water Heaters In November 2026

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Looking for the Best Honeywell Water Heaters that can last long and perform well? Read our review and buying guide on Best Honeywell Water Heaters below.

To help you in your search, we have completed this list of the Best Honeywell Water Heaters.

Top Rated Best Honeywell Water Heaters Of 2026

Rank	Product Name	Score
1	reliance water heater co 9003410 C3 Piezo Ignitor Assembly Buy Now	9.7 Buy Now
2	Honeywell CQ100A1021/U CQ100A1021 Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, 18" Buy Now	9.5 Buy Now
3	Honeywell RWD21 Water Leak Alarm Buy Now	9.1 Buy Now
4	Honeywell CQ100A1039/U CQ100A1039 Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, 30-Inch Buy Now	8.8 Buy Now
5	Honeywell CQ100A1013/U Not Available CQ100A1013 24-Inch Replacement Thermocouple for Gas Furnaces, Boilers Buy Now	8.6 Buy Now
6	Honeywell CQ100A1005/U CQ100A1005 Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, 36-Inch Buy Now	8.3 Buy Now
7	THERMOCOUPLE 18 INCH HONEYWELL REPLACEMENT FOR BOILERS, FURNACES, WATER HEATERS Buy Now	8.1 Buy Now
8	Reliance 100112328 21 in. Gas Water Heater Thermopile Assembly Buy Now	7.8 Buy Now
9	Reliance Water Heater 9007876 Gas Thermopile Assembly, Pack of 1 Buy Now	7.5 Buy Now
10	Honeywell WT8840B1000 Water Heater Gas Control Valve, NAT 160 Degree F 1" Cavity Buy Now	7.2 Buy Now

1. reliance water heater co 9003410 C3 Piezo Ignitor Assembly

• Specific for gas water heaters

2. Honeywell CQ100A1021/U CQ100A1021 Replacement Thermocouple for Gas Furnaces, Boilers and Water

• Item weight: 0.16 lb
• Brand name: honeywell
• Item dimensions: 5.0"l x 4.75"w x 0.75"h
• Country of origin: china

3. Honeywell RWD21 Water Leak Alarm

• Detects water only 1/16" deep
• Audible alert when water is detected
• Water sensor and alarm in one
• Economical way to defend against water leaks in multiple locations throughout the home
• Unlimited use spot detector

4. Honeywell CQ100A1039/U CQ100A1039 Replacement Thermocouple for Gas Furnaces, Boilers and Water

• Item dimensions: 4.8"l x 5.0"w x 0.8"h
• Country of origin: china
• Brand name: honeywell
• Item weight: 0.1 lb

5. Honeywell CQ100A1013/U Not Available CQ100A1013 24-Inch Replacement Thermocouple for Gas Furnaces,

• Model number: cq100a1013/u
• The product is manufactured in china
• The product is highly durable and handle
• The product is easy to use

6. Honeywell CQ100A1005/U CQ100A1005 Replacement Thermocouple for Gas Furnaces, Boilers and Water

• For 30 millivolt systems
• Brand name: honeywell
• Designed to install in 15 minutes or less
• Universal adapter allows easy mounting on most pilot burners, including push-in, clamp-in and screw-in burners

7. THERMOCOUPLE 18 INCH HONEYWELL REPLACEMENT FOR BOILERS, FURNACES, WATER HEATERS

• Replacement for 18" gas pilot safety control for use with gas furnaces, boilers, water heaters and room heaters.

8. Reliance 100112328 21 in. Gas Water Heater Thermopile Assembly

• This product is manufactured in china
• This product adds a great value
• 100112328 21 inch thermopile assembly

9. Reliance Water Heater 9007876 Gas Thermopile Assembly, Pack of 1

• Product is highly durable and very easy to use
• This product is manufactured in china
• This product adds a great value
• Brand name: reliance water heater

10. Honeywell WT8840B1000 Water Heater Gas Control Valve, NAT 160 Degree F 1" Cavity

• Temperature range: 32 to 150 f
• An included integrated ntc temperature sensor reads water temperature within the appliance up to 221 f (105 c)
• Temperature ratings: ambient-- 0 c to 60 c. inlet/outlet size (in.) - 1/2 inch. npt x 1/2 inch. inverted flare. capacity - min. 30 ft3/hr, max. 75ft3/hr
• Mounting in the upright position
• Pressure regulator setting (psi): 5.0 in. wc