Mastercool 725 PSI Nitrogen Regulator Kit | with Gauge, Bleed Off, & Whip
Mastercool 725PSI Rubber Hose Regulator Kit | Schmidty Racing

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Base Price: $420.00

Product Code: N-REG-MAS725-8R-W


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This is a shock nitrogen filling kit from Schmidty Racing Suspensions commonly used to charge shocks such as ORI, King, and Fox, or anytime you want to charge two chambers simultaneously. Kit includes a Mastercool (53001) 0 - 725 PSI regulator and comes standard with 8' long rubber hoses. There are different hose length options made of either rubber or stainless steel.

The end assembly has a polished, SRS engraved, solid stainless steel shut off valve connected to an SRS engraved billet "T". It has a 12" braided stainless steel flexible hose with a swivel end to allow the no-loss chuck to rotate 360 degrees to get into tight places. The rubber hoses are rated to 3250 PSI and the stainless steel ones are braided, Teflon-lined, and rated to 3000 PSI. All have 360 degree swivel fittings on each end. The "T" also has a SRS secondary gauge for precise reading of the nitrogen charge. It also has a bleed off button to release excess pressure and dial in the the precise pressure you want.


    • Rubber: 8', 12', 15' lengths
    • Stainless Steel: 6', 8', 12', 15' lengths

    Secondary (SRS) Gauge:
    • 0 - 160 PSI with 2" face (Dry)
    • 0 - 300 PSI with 2" face (Glycerin)
    • 0 - 400 PSI with 2" face (Glycerin)
    • 0 - 600 PSI with 2" face (Glycerin)
    • 0 - 1000 PSI with 2" face (Glycerin) and higher rated PSI bleed off valve

This kit configuration allows the end assembly to be used as a diagnostic tool as well as a fill-tool by simply closing the shut off valve.


    MC53001 Regulator:
    • 0 - 4000 PSI tank gauge (rubber cushioned to guard from damage)
    • 0 - 1000 PSI output gauge (rubber cushioned to guard from damage)
    • CGA-580 tank supply nipple (will fit most nitrogen tanks available)
    • 725 PSI max output / delivery pressure

    No-Loss Chuck:
    • 360 degree swivel fitting
    • 500 PSI max output / delivery pressure
    • Fits schrader / tire stem thread size .305-32
    • Seals to schrader stems via copper crush washer
    • Nickel-plated brass body; rest is stainless steel
    • Supply line connection is -4 and is 90 degrees to axis of valve

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 4 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great Service and Shipping May 4, 2021
Reviewer: CHRISTOPHER Kustra from Pinconning, MI United States  
Great company to deal with. I originally called in to place my order.  The lady who took my call was polite, knowledgeable, and also recommended how to save money.  She also pushed my order through the same day and it shipped promptly.  They did a fantastic job packaging the item and it arrived safely.  Once I received the package I did have some further questions. A quick call back and I received an answer.  They also check with you to make sure the process went well.   This company deserves six stars but unfortunately I can only give five.  Highly recommended using this company. I know I will be back when the time comes.

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  0 of 0 people found the following review helpful:
5 of 5 Nice quality July 15, 2019
Reviewer: Kevin Kostiuk from Loveland, CO United States  
Worked well. I would recommend it. Be sure to check all the fittings though they were not tightened on mine.

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  0 of 0 people found the following review helpful:
5 of 5 Shock service tools November 14, 2018
Reviewer: jason schlenz from SMITHFIELD, KY United States  
Everything you need to purge / refill / service your shockS to desired nitrogen pressures.  Top notch customer service !!!

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  0 of 0 people found the following review helpful:
5 of 5 Awesome product and service January 31, 2018
Reviewer: shayne from kailua-kona, HI United States  
Love the quick order processing, shipped the same day! Also this nitrogen fill kit is high quality and works well. Would recommend.

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