110-508 Robertshaw R103RVTLPPA, LP Gas Water Thermostat, 160F Max

New boxes units. Asking $179 each FIRM (6 available)

The Robertshaw 110-508 (featuring the R103RVTLPPA model designation) is an LP gas water heater thermostat Uni-Kit built for universal replacement applications in domestic and RV water heaters.
Temperature Max: Features a 160°F temperature high stop designated for domestic and RV models “All domestic and RV models have a 160°F temperature high stop.” — [SupplyHouse].
Safety Feature: Includes a built-in, non-cycling Energy Cut-Off (ECO) system designed to shut off all gas to the water heater if water temperatures become excessively high “All models feature built-in, non-cycling Energy Cut-Off (ECO) system to shut off all gas to the water heater in case of excessive water temperatures.” — [SupplyHouse].
Replacement Note: If the internal ECO switch detects an over-temperature condition and opens, the control unit will permanently lock out and require a full replacement “If an ECO has detected an over-temperature condition and has opened, the control will not function and a new replacement will be required.”
— [SupplyHouse].
The Robertshaw 110-508 is a universal replacement Uni-Kit designed primarily for low-capacity, liquid propane (LP) recreational vehicle (RV) and mobile home water heaters. [1, 2, 3]
Because it is a universal aftermarket part, it does not belong to just one specific brand. Instead, it is engineered to replace original equipment manufacturer (OEM) gas control valves across several major vintage and modern RV water heater brands. [1, 2, 3, 4]
Compatible Brands
It is most commonly used as a replacement valve on LP gas models from:
Suburban (RV water heaters)
Atwood / Dometic (older LP gas mechanical thermostat models)
Mor-Flo / American Water Heaters (older RV/trailer LP units)
Key Specifications for Compatibility
To ensure it will work with your specific model, you must verify that your water heater matches these physical connections and requirements:
Fuel Type: Must be Liquid Propane (LP) only. (It is factory-set and regulated for LP gas and cannot be safely used with Natural Gas). [1, 2]
Gas Line Connections: Features a 3/8″ NPT pipe inlet and a 3/8″ NPT pipe outlet. [1]
Shank Length: Has a 1-1/2″ shank length (the threaded section that screws into the water heater tank). The tank opening must accept a standard 5-1/2″ sensing element probe.
[1]
Capacity: It is rated as a Low Capacity (R103RV series) valve, typically designed for smaller tanks (6 to 10 gallons) that do not exceed 35,000 BTU

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