Oventrop Thermostatventil Baureihe A DN10,R 3/8,PN10, Durchgang
vanne thermostatique Oventrop série AQ 1183361 DN 10, droite, Winkeleck
Hanover, Germany. 04th Oct, 2021. The thermostat of a heating system in an apartment. Credit: Hauke-Christian Dittrich/dpa/Alamy Live News Stock Photo - Alamy