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AVG 20mm 3/4" NRI-PRV-20C Non Return Isolation Pressure Reducing Combo Valve

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    Click here to be notified by email when AVG 20mm 3/4" NRI-PRV-20C Non Return Isolation Pressure Reducing Combo Valve becomes available.


    The AVG NRI-PRV-20C 20mm 3/4" Non Return Isolation & Pressure Reducing Combo Valve combines 2 valves in one as a compact unit to save cost/installation time and eliminates a potential leaking point. This AVG NRI-PRV-20C combo valve is commonly supplied as part of AVG Quickie kits and many solar hot water installation kits, making the NRI-PRV-20C a popular direct swap item during the pressure valve train servicing without changing the plumbing layouts. 

    The AVG NRI-PRV-20C combo valve is directional marked by the arrow on the valve body. The blue handle is part of the non return isolation duo valve assembly and can turn the water supply on/off. The brass barrel houses the adjustable spring, which can be turned with a screw driver and allows pressure adjustments between 250-650kPa with a factory preset at 500kPa. Therefore, it is best to have this brass barrel facing up (the blue handle facing down) during installation to allow easy access to adjustment screw, despite all AVG marketing materials/photos show the valve upside down. 

    The AVG NRI-PRV-20C combo valve is Watermark approved and features 20mm 3/4" copper olive compression fitting ends for direct copper pipe connection or used as a male thread with the cone nuts removed. A pair of insulation jacket is included to minimize the heat loss.

    Please note, this the newer and updated version of AVG NRI-PRV-20C combo and it no longer has a 6mm pressure test point to insert a pressure gauge. This new unit superseded the old version in 2022. A photo of the old version AVG Combo valve is shown at the end of the photo gallery for the reference.


    Technical Details

    • Manufacturer: AVG
    • Model: NRI-PRV-20C
    • Thread Size: 3/4" BSP (20mm) Compression Fitting (20C x 20C)
    • Physical Thread Measurement: 26.441mm external thread diameter after the compression nuts removed (Refer to the BSP sizing chart in the photo gallery)
    • Material: DR Brass Body
    • Features: Insulatoin Jacket. Compression fitting ends, adjustable range 250-650kPa, factory set at 500kPa. Ball valve style non return isolation is inbuilt. Internal serviceable strainer included.
    • Flow Rate: 120L/min@500kPa
    • Max Temperature: 80 deg
    • Max Inlet Pressure: 1600kPa
    • Intended Use: Pressure Reducing Valve with Triple Test Points and Integrated Duo Isolation non return valve
    • SKU: AVG-NRI-PRV-20C

    Package Contents

    - AVG NRI-PRV-20C 20mm 3/4" combo valve

    - Package Weight 900g

    Dispatch next business day. Local pick up available during office and after hours.


    2 years replacement (parts only) warranty from purchase date is offered by All Plumbing Online. The original part must be returned first for assessment.

    Return Policy

    30 days worry free return is offered for peace of mind. All returned items must be complete and in its original packaging. Buyer is responsible for return postage and 20% restocking fees will be charged on return.


    Contact Us

    All Plumbing Online is a local business based in Brisbane, run by an experienced engineer who works as a consultant to the plumbing industry at manufacturers' level. I used to operate my own plumbing company also and can answer any of your plumbing related questions, such as fitments, sizing or just chatting in general for advice. Feel free to drop me an email or a call. 



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