注意：这种装置只应该安装在通过认证的至少包含四圈螺纹的洒水龙头上。
Note: Device should only be installed on approved sill cocks containing at least four full threads.
只能采用具有四圈以上的美国国家软管(NH)螺纹的、通过认证的软管水龙头或软管连接件。
Use only with approved hose bibbs or hose fittings having four or more full American National hose (NH) threads.
在手指旋转使螺纹啮合无间隙后，再用带式扳手旋转不要超过一至两圈。
Apply strap wrench make-up of no more than one to two turns beyond finger tight thread engagement.
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