Kochek Fire Equipment


The Hydrassist Valve is designed for use as both a hydrant booster and for inline pumping in long relay evolutions.

The valve has three modes:

  1. Straight thru flow

  2. Boosted flow

  3. Emergency shut off

The valve is connected to a hydrant or placed inline for normal (straight flow.) If the pressure is low, a second pumper can be attached to boost pressure without interrupting the flow (boosted flow). The pumper can be disconnected without shutting down the flow (emergency shut off).

Normal operating pressure is no greater than 250 psi.


  • Aluminum body
  • Stainless steel ball
  • Weight:  36 lb.
  • Extends: 13”
  • Width:    17”
  • Height:   13”
  Description Part Number
 (3) 4” Storz to 4 1/2” NST Female Swivel   80K04451
 (3) 4” Storz to 5” NST Female Swivel   80K04501
 (3) 5” Storz to 4 1/2” NST Female Swivel   80K05451
 (3) 5” Storz to 5” NST Female Swivel   80K05501

Hydrassist Valve Manual

color coding is free

Color code this item, at no additional charge. Color coding helps to identify your equipment at mutual aid calls quickly.*

* Color coding applies only to the threaded/Storz connections, all valve bodies will remain Silvadillo and handles Black. 



many different types of fire department thread choices

We offer many different types of thread choices to accommodate our customers throughout the USA. We maintain a card file in our office with thread types used by various cities throughout the USA.

If your thread type is not shown below, please give us a call to discuss your requirements. 

  • National Standard Thread (NST), also known as National Hose thread (NH). It is the most common type of fire hose coupling used in the United States.

Kochek Finishes

Kochek’s standard adapters are furnished in Hard Coat Anodized Aluminum. Hard Coat is a high-quality, durable finish that is most often specified by manufacturing engineers. They exhibit the following qualities.

  • Meets mil spec 8625 Type III class 1
  • 2mil thickness which gives an excellent abrasion and corrosion resistance that has a Rockwell C rating of 65-70 and meets ASTM B117 specification of 336+ hours of salt spray resistance.

Note:  Also available are Clear and Orange anodized. They are a high-quality, durable finish that provides excellent corrosion resistance and meets the ASTM B117 specification of 336+ hours of salt spray resistance and has a Rockwell C rating of 60-65.


hard coat anodized aluminum


powder coat your fire dept connections
Powder coat is a polymer resin based dry finish that is a durable non-conductive coating to help inhibit electrolysis and is color consistent to a delta of 0.5 and available in many vivid colors.

CLICK HERE to view the available powder coat color choices

Also offered are the following additional choices:

  • K-Brite (polished aluminum, no coating)
  • K-Chrome (chrome plated aluminum), please call for pricing

Laser Engraving

laser engraved adapters

We also offer custom laser engraving of your adapters for an additional charge. If you require this option, please select that option and type in the box the name or initials you want laser engraved. The size of your adapter limits us.


Delivery Times

delivery times vary based on size

Delivery times are variable by the size, thread type, and finishes you select. There is no definitive answer, but NST threads, in Standard Silvadillo/Black can usually ship quicker. Other options can add a few weeks to lead times. If you require this item in a rush, please give us a call, and we will be most happy to contact our factory for a current lead time.


We are experts on Kochek Fire Equipment

We are Kochek specialists. We deal with various threads and finishes daily. Our goal is to help you order the correct item the first time. However, many items are made to order. Unfortunately, they are not subject to cancelation or return once your order has been submitted. Please give us a call before ordering if you are uncertain of your thread types, finishes, sizes, colors, or have any other questions.


hydrassist valve


Mounting Bracket (left) – Mounting Post (right)


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Hydrassist Valve- 80K

  • $1,209.50

Available Options

Delivery/Shipping Availability: Item ships directly from manufacturer. Approximate delivery in 3-5 weeks.

WARNING: Cancer and Reproductive Harm:

Tags: Kochek, LDH Hydrant Valve- 80K, LDH Appliances, 80K, Hydrassist, valves, kochek, LDH