Robertshaw 4290-011 Gas Thermostat Refrigerant Ammonia requires specialized stainless steel

Ammonia requires specialized stainless steel or compatible alloy bellows

ensuring that any flame rollout event is professionally diagnosed before the system is placed back into operation

Key Benefits Complete Seal Restoration: Includes both check assembly O-rings

Common Questions: Can I use Teflon tape on the threads

For heating sequences

Robertshaw 4290-011 Gas Thermostat Refrigerant Ammonia requires specialized stainless steelThe Robertshaw 4290 011 is a high capacity, snap action hydraulic thermostat engineered for precise temperature control in heavy duty commercial cooking equipment. Built for high demand environments, this GS series gas control features a 3 8" pipe inlet and outlet, supporting a capacity of up to 30,000 BTUs. With a temperature range of 200F to 400F, it is the standard choice for maintaining thermal stability in commercial fryers, griddles, and