This thermostatic group is from Leonard Valve Co. It is a part of the TM-20 and TM-25 valves. When cleaning the thermostatic group, push rod through the cover. Must be careful to not pull the coil out of shape. If any deposit has collected on it, brush in a non-corrosive cleaning solution. Leonard Valve Co. model number M20-G2.
EC Part Number: #54824
Manufacturer Number: M20-G2
Manufacturer: Leonard Valve Co