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10 bestRheem Gas Heatersof December 2025

112M consumers helped this year.

5% off

1

FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 GPM, 90,000 BTU Instant Hot Water Heater, Instagas Classic 90 Series
FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 GPM, 90,000 BTU Instant Hot Water Heater, Instagas Classic 90 Series

FOGATTI

9.8

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2

Mizudo Natural Gas Tankless Water Heater 3.6 GPM, 80,000 BTU Indoor Installation Instant Hot Water Heater
Mizudo Natural Gas Tankless Water Heater 3.6 GPM, 80,000 BTU Indoor Installation Instant Hot Water Heater

MIZUDO

9.6

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3

Rheem SP13845B Thermostat
Rheem SP13845B Thermostat

Rheem

9.4

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17% off

4

Rheem SP14904A Water Heater Natural Gas Control Thermostat
Rheem SP14904A Water Heater Natural Gas Control Thermostat

Rheem

9.1

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5

Rheem SP20231 Gas Control Assembly
Rheem SP20231 Gas Control Assembly

Rheem

8.8

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Related productsUp to 7% off

Magnesium Flexible Water Heater Anode Rod- Magnesium Anode Rod for Rheem, Reliance, Richmond, Kenmore, GE, 44 Inch Long, 0.8 Inch Diameter, 3/4 Npt Thread, 1-1/16 Inch Hex Socket Tool and Teflon Tape

Magnesium Flexible Water Heater Anode Rod- Magnesium Anode Rod for Rheem, Reliance, Richmond, Kenmore, GE, 44 Inch Long, 0.8 Inch Diameter, 3/4 Npt Thread, 1-1/16 Inch Hex Socket Tool and Teflon Tape

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44 Inch Flexible Magnesium, Anode Rod for Rheem, Reliance, Richmond, Kenmore, State, GE RV Hot Water Heater Tank,3/4 NPT Thread

44 Inch Flexible Magnesium, Anode Rod for Rheem, Reliance, Richmond, Kenmore, State, GE RV Hot Water Heater Tank,3/4 NPT Thread

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Rheem SP13846A HVAC Liquid Propane Gas Valve & Thermostat - 120V

Rheem SP13846A HVAC Liquid Propane Gas Valve & Thermostat - 120V

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WV8840C1406 - OEM Upgraded Replacement for Rheem Water Heater Natural Gas Valve

WV8840C1406 - OEM Upgraded Replacement for Rheem Water Heater Natural Gas Valve

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6

Rheem SP13845A Gas Thermostat (SP13845A)
Rheem SP13845A Gas Thermostat (SP13845A)

Rheem

8.5

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7

Honeywell WT8840B1000/U Water Heater Gas Control Valve, NAT 160 Degree F 1" Cavity
Honeywell WT8840B1000/U Water Heater Gas Control Valve, NAT 160 Degree F 1" Cavity

Honeywell

8.3

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8

HQMPC Tankless Water Heater Isolation Valves Tankless Water Heater Flush Kit Tankless Valve Kit 3/4" NPT, Including 1 Valve For Hot water,1 Valve For Cold Water, 1 Pressure Relief Valve
HQMPC Tankless Water Heater Isolation Valves Tankless Water Heater Flush Kit Tankless Valve Kit 3/4" NPT, Including 1 Valve For Hot water,1 Valve For Cold Water, 1 Pressure Relief Valve

HQMPC

8.0

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9

Rheem RTG-84XLN-1 Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater, Gray
Rheem RTG-84XLN-1 Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater, Gray

Rheem

7.7

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10

3/4 Inch JUWO IPS Isolator Tankless Water Heater Service Valve Kit, with Pressure Relief Valve, Hot Cold Water Supply Isolator Valves fit for Rheem, Rinnai, Navien
3/4 Inch JUWO IPS Isolator Tankless Water Heater Service Valve Kit, with Pressure Relief Valve, Hot Cold Water Supply Isolator Valves fit for Rheem, Rinnai, Navien

JUWO

7.4

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