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For contractors installing underfloor heating systems or radiator controls
or a burnt smell emanating from the coil
Durability: Constructed from bronze with an EPDM seat
As the direct replacement for 311788
the D25403 is the designated K-2110 pilot valve kit for all standard GP-2000 pressure reducing valves
Siemens Building Technology 188-0030 Thermostat Refrigerant For contractors installing underfloor heatingThe Siemens 188 0030 is a heavy duty unit mounted pneumatic thermostat designed specifically for high low temperature control in HVAC terminal units like fan coils and induction units. This TH 188 HC model features a direct acting (DA) heating and reverse acting (RA) cooling sequence, making it a critical component for two pipe changeover systems. Engineered with a bimaterial sensing element, it provides reliable proportional control and pneumatic