• Piston Intake Relief Valve With Corrosion Resistant Brass Piston- 70K

Kochek Fire Equipment Co.


Features a Highly Corrosion Resistant Chrome-Plated Brass Internal Piston.

This Piston Intake Relief is used as a truck inlet valve and incorporates a quick connection, fast but controlled valve opening, air bleed-off, and a relief valve. The 45-degree inlet permits a smooth water flow. The 5” full flow opening reduces friction loss. Normal operating pressure to 200 PSI

FRICTION LOSS: 6 PSI at 1,500 GPM; 10 PSI at 2,000 GPM


  • Compact lightweight powder coated aluminum body piston valve with 45-degree elbow and corrosion resistant brass piston designed for maximum flows.
  • Significant turbulence reducing oval waterway for minimal friction loss.
  • Forged storz head with stainless steel locking mechanism.
  • Pressure relief valve allows for easy adjustments from 75-250 PSI in increments of 25 with round 2 5/8” dump.
  • Folding handle
  • Extends only 10 ¼” from pump panel.
  • Weight: 38 lbs.
  • Width:   7 ¾”
  • Height: 16 ¾”
  Description Part Number
  4” Storz to 4 1/2” NST Female Swivel   70K45104
  4” Storz to 5” NST Female Swivel   70K50104
  4” Storz to 6” NST Female Swivel   70K60104
  5” Storz to 4 1/2” NST Female Swivel   70K45105
  5” Storz to 5” NST Female Swivel   70K50105
  5” Storz to 6” NST Female Swivel   70K60105


free colors

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. 



We offer many different types of fire department threads.

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.


Kochek Fire Equipment hardcoat aluminum


Kochek powder coating offers the best selection of vibrant colors.
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 engrave your fire fighting equipment

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

Kochek delivery times

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.


your number one source for all kochek fire equipment products

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.


kochek 70k piston intake relief valve

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Piston Intake Relief Valve With Corrosion Resistant Brass Piston- 70K

  • $934.50

Available Options

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

WARNING: Cancer and Reproductive Harm:

Tags: Kochek, Piston Intake Relief Valve With Corrosion Resistant Brass Piston, LDH Appliances, 70K, kochek, valves