The Protech TRD Kit Replacement Combustion Shut off Device SP20246B is a red thermal release device designed for gas water heaters by brands like Rheem, Ruud, Richmond, and GE. The kit includes fittings, gasket, screws, and an adapter, making it easy to install. This model, SP20246C, is manufactured in 2024 and is compatible with more numbers like AP14390-2 and SP20280. This product ensures a safe and efficient shut-off mechanism for your water heater.