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AR20399 – Gymatic 3/B Bolt on Unloader for RK, RR & XM Series AR Pumps



AR Brand Gymatic 3/B AR20399 Adjustable Pressure Unloader Valve for RK, RR & XM Series Pumps.
This unloader has 1/2 Male Inlet X 3/8 Male Outlet and a Built-In Adjustable Chemical Injector.
Rated for 3 to 5.5 Gallons Per Minute and up to 3,650 PSI.
Comes complete with mounting bolts
Fits the following AR brand series pumps:
RK, RR & XM Pumps


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Customer Questions & Answers

  1. Q My old valve is stamped Gymatic 3. There is no B. are these valves the same answer now
    Asked by Steven Centofanti on September 30, 2019 12:19 pm
    Answered by the admin

    The Gymatic 3 is a series, the most popular unloader of this series is the AR20399. However you want to find out the pump you have and find a suitable unloader to make sure you get 100% the right one.

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Prop 65 Warning!

This product can expose you to chemicals which are known to the State of California to cause cancer.