Each replacement O-ring kit contains all the O-rings required to refurbish any True Union Check or Ball Valve (regardless of model or style), or a minimum of two pipe unions.

• 每个更换件O形环组件包含所有O形环,满足整修任何True Union止回阀或球阀(无论是什么型号或类型)所需,或者最少包含两件管接头。