Hydrant Coupler 4inch API Style 64910 (Obsolete product)


The Model 64910 coupler is the latest coupler design and it supersedes Models 64900 and 60700-1. It is used for air reference pressure control systems.

The lower half of Model 64910 has been completely redesigned. This new lower half incorporates three (3) detent pins, an internal collar locking device and collar lifting handles [both “short” (standard) or “tall” (option “T”)], providing improved ergonomics and operational handling during disconnect.

Two additional coupler models that include this new lower half are also available, Model 64912 for digital pressure control systems, and Model 64913, which is electro-hydraulically controlled.

Earlier coupler Models 64900 and 60700-1 can be retrofitted to gain these new features by changing only the lower half.

Sorry About That… This Product is an Obsolete Item…

This product is no longer available. To assist you with finding an alternative product that will perform the same function we have offered some suggested replaceable products below. 

We have also made information about obsolete products available to assist with purchasing spare parts that may still be available. You can view obsolete product information by searching for product codes in our SEARCH bar. 

If you would like any further information regarding our parts please don’t hesitate to contact your local Liquip representative and we will get back to you as quickly as possible. 

Features & Benefits
  • Mates all adapters and all standard hydrant valves in accordance with API bulletin 1584
  • Outlet of elbow is flanged to accept various outlet male adapter fittings. Options to mate older quick disconnects (QDs) available, reducing maintenance costs if male fitting is damaged.
  • 3 and 4 inch NPT or BSPP outlet threads available
  • Air/fuel sense ports parallel to outlet
  • All ports with straight O-ring sealed threads
  • Air bleed under sealed screw
  • Closing time adjustment accessible without removal of air port fitting
  • Studs used for connecting lower half, reducing chance of over-tightening connecting fasteners
  • External collar locking device eliminated
  • Optional carrying handles available. Transverse-mounting standard. A second QD mounted handle is also available.
  • Carriage affixed by studs. No special length bolts required, reducing chances for errors when carriage is added in the field.
  • Port to connect to hydrant provided on coupler. No special hose assembly required
  • Parts common to 4 inch inline valves and Model 60700-1 coupler used for less costly maintenance
  • Design changes have not increased weight


Recommended products for replacement

    Technical Information

    A direct spring-loaded pressure control unit that is controlled by the air reference pressure provided from the vehicle system. A sealed screw outside the air hose fitting provides closing time adjustment. A sealed screw is also used to bleed the unit of air.

    Working Pressure
    200 psi (23.793 bar)

    Proof pressure 
    450 psi (31.034 bar)

    Air pressure operated
    Nominal bias (air pressure required above control pressure) — 25 psi (1.724 bar).
    Bias increases to approximately 33 psi (2.276 bar) at flow rates up to 1,200 USgpm.

    Fully open pressure drop
    21 psi (1.448 bar) at 1,000 USgpm when mated to Model 60554 hydrant valve

    Closing Time
    2-5 seconds (adjustable)

    Opening Time 
    5-10 seconds (no adjustment)

    50 US gal. maximum at 1,000 US gpm


    (Basic coupler) 29.0 lbs (13.154 kg)

    Ordering Information

    Under Maintenance - Contact your local Liquip Representative.

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