Robertshaw 700-428 Gas Valve THPU32HP7Y a bypass valve is often

a bypass valve is often necessary in systems with high minimum flow requirements or where older constant-speed pumps remain in service

Operating at 208-230V with a single-phase 1/8HP rating

Using it in a single-stage application may lead to improper staging logic and potential compressor damage

A steady ON LED indicates an internal control failure

Where is the pilot gas sourced on this model

Robertshaw 700-428 Gas Valve THPU32HP7Y a bypass valve is oftenThe Robertshaw 700 428 Gas Valve is a high capacity, 24V slow open gas valve engineered for precision fuel management in standing pilot systems. This Uni Kit gas valve features a 1 2" NPT inlet and a 3 4" NPT outlet, delivering a robust 240,000 BTU capacity for residential and light commercial furnaces. The slow opening gas valve design ensures a soft ignition by gradually ramping up gas flow, which reduces burner stress and "rollout" spikes common in