expansion vessel to protect against overpressure and a hydraulic clutch in a modern natural gas boiler room, lined with ceramic ti

boiler boilerroom cable ceramic circulation clutch connected connection connector connectors copper coupling electric energy expansion fastening faucet floor fuel gas glandless handle heating home house hydraulic installation interior junction lever manometer motor natural overflow pipe pipeline pipes piping pressed pressure protection pump room safety socket supply synchronous system thread tiles tube tubes valve vent vessel water