Thermostat comparison

scatpackbee said
From what I’ve read the Stewart Component thermostats are Robertshaw modified by Stewart with 3, 3/16 holes drilled in the poppet valve.

I believe this is correct. I just don’t know if Stewart Components took over the manufacturing from Shaw or if Shaw now only sells to Stewart or what the relationship is.

So far, Stewart Components is the only place I can find them.