FIELD: pipe line fittings; water supply pipe lines. SUBSTANCE: plug cock has body with pipe unions, swivel taper plug and tightening member. Fitted in hollow taper plug is additional plug articulated with threaded rod. Tightening member is made in form of axial compression spring and is mounted in body. Additional plug is mounted for raising and is provided with magnet. EFFECT: enhanced durability of plug cock; enhanced protection of cock against scale and iron-containing admixtures. 2 dwg
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