| 摘要 |
A stopcock (2; 2') for a water heater, which stopcock comprises an end plug (12; 12') with an opening through which there extends a spindle (11; 11') in threaded engagement with the opening. A conical surface (14; 14') of the spindle (11; 11') is in sealing abutment with a correspondingly shaped seat in the end plug (12; 12') when the stopcock (2; 2') is in an open position. |
