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4 Series (3/8 size)

Hosexpress distributes Foster products like the 3/8size “one way shut off”-4 series couplers. One Way Shut-Off - Socket is valved, shutting off supply line at disconnect.  The Plug is unvalved, exhausting downstream line at disconnect. With these3/8size couplers you should install the socket on a pressure line. Protective covers are available for these couplers.

Specifications include:

  • Precision leak proof seal
  • High flow compatibility for small coupler
  • Positive locking mechanism
  • Available in brass or stainless steel

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