Ford Inverted Key Valve Curb Stop Suggested Specification

This specification covers Inverted Key Valve Curb Stops with compression style service line
connections.  The curb stop shall conform to AWWA Standard C800 and latest revisions
regarding thread types and diameters.  All cast components shall be certified waterworks red
brass meeting the latest revision of AWWA C800, ASTM B62 and/or ASTM B584, UNS No.
C83600.  The alloy described by this Standard is 85% copper and 5% each of tin, lead and 
zinc (85-5-5).

The key and body shall be precision machined to ensure an accurate fit for a complete
watertight seal.  An EPDM or Buna-N rubber O-ring within a machined groove ring at the top
of the key will provide additional protection against leakage from the top of the key.  A coiled
spring of silicon bronze, located between the key and the bottom cap, shall assist the inlet
water pressure in holding the tapered key in place.  The key and tee head shall be securely
locked together by means of a bronze pin.  The valve shall have a substantial tee head for 
opening and closing with a 90 degree rotation of a standard slotted wrench.  The service line
connections shall be a compression connection meeting AWWA C800 Sec. 4.4.9.

The stops and lugs for controlling the tee head rotation shall be enclosed by the tee head 
skirt.  Each valve shall be water tight and individually tested for leaks.  Batch testing is not
allowed.

The Inverted Key Valve Curb Stops shall be the Z Style as manufactured by The Ford Meter
Box Company, Inc., Wabash, Indiana, or prior approved equal.