Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU)

  • Product Description:

    Trevi A952501NU 1/2" flow cartridge assembly (x1) - anti-clockwise close.

    22mm hex headnut. New all-brass design released in early 2019.

    Sold as single units, one per pack. You will need two per shower.

    Trevi recommend that you replace both flow cartridges should one need replacing.

    May also be known by the older product codes A961648AA or A952500NU11.

    Cartridge Measurements:
    Barrel Diameter (below thread): 23.2mm
    Lower Thread: 3/4" BSP (24.9mm)
    Hot or Cold Side: Cold Side
    Close Direction: Anti-Clockwise Close (Clockwise Open)
    Box Spanner Size Required: 22mm

    The Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU) is a genuine, brand new Trevi product, covered by a minimum 1 year Trevi manufacturer's guarantee.

    Available for same day despatch if ordered before 3:30pm Monday-Friday (otherwise despatching will be on the next working day). For the delivery options available for this product, please add it to your Basket or see our delivery options page.

    Not what you're looking for? See all Trevi Shower Cartridges or try our unique Shower Spares Finder.

    For advice on this or any product, please call 01452 619836, email us at, or see our contact page.

    Product Specifications:

    • Brand Trevi
    • Name Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU)
    • SKU / MPN Trevi A952501NU
    • GTIN / EAN 4015413845007
    • Categories Trevi Shower Cartridges
      Shower Cartridges
    • Colour Brass
    • Fitment Screw In
    • Size 1/2"
    • Sub Type Ceramic Disc
    • Type Flow
    • Availability In Stock
    • Despatch Same Day Despatch
    • Condition Brand New
    • Returns 30 day money-back guarantee
    • Manufacturer Guarantee Yes
  • The Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU) will fit the following 11 products.

    List(s) are sorted by product type and then alphabetically.

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    May fit other products.

    If you are unsure of your product model, or would like more information, please contact us.

  • A selection of the latest reviews for the Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU) can be read below:

    • Replaced my flow cartridges on trevi therm, shower struggled to turn off and would come on itself.
      Original was corroded, leaking and stiff.
      The difference is phenomenal, next day delivery and they sorted the problem, turn on and off so much easier and only took 20 mins to fix.

      Chris Brooks

    • Good product

      Martyn Busson

    • Easy to change and fits existing mk1 trevi boost. Doesn’t have the mechanical stops of the original so remains to be seen if it lasts as long (26 yrs for original)

      Michael Taylor

    • Excellent advice given & speedy Dispatch.

      Jerry Bucklow

    • Solid brass cartridges. Better the quality than the original plastic parts they replaced. Fitted perfectly and very smooth action. Shower now working like new!

      Andrew Myles

    • Perfect for job…..keep my shower going another 20 years

      William Jennings

    • All was just perfect !!!

      Heinz Offermanns

    • Great!

      Rida Jichi

    • Good service and good product - dispatched promptly.

      Ron Yates

    • Perfect fit for my Trevi mixer shower, fitted it in minutes.

      Phil Stafford

    • Got these to replace the originals which were very difficult to take out the new ones are far better in design so so the socket grips much better than the older model 21mm if i remember correctly

      K Oz

    • Perfect replacement for old unit.

      Peter Hunt

    • Top quality and perfect fit

      Peter Laine

    • Fitted perfectly. Thank for having it in stock


    • This was a great replacement for the old style Trevi flows. The service was great two. They were delivered two days after ordering, arrived before lunch and installed the same afternoon:-)

      Keith Porter

    • Easy to select the correct valve and order. Delivered within a couple of days. Brilliant

      Stuart Warne

  • Do you have a question about the Trevi 1/2" flow cartridge assembly (single) - anti-clockwise close (A952501NU)?

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    • My flow control initially turns water on to the shower then fails to respond to any further increase in flow despite rotating the control.
      After about 20 seconds the flow reduces and can only be (temporarily) increased by turning the temperature control up.
      The gears and spindle are not worn, so do I need to replace the Trevi 1/2 '' flow cartridges ?

      Hello, if you remove the spindle and cogs, turn the valves carefully with a pair of pliers, do they work?, if they do, and the flow still dimisnishes, you may have a supply/blocked filters problem on the temp cartridge.

    • Hi,
      When my Trevi boost shower is turned off, it still drips water from the shower head. Is is likely to be the flow cartridge that needs replacing or the booster cartridge? When working the power flow and water temperature is fine.

      Hello, definately the flow cartridges, there are tweo in each shower, A952501 , it may also be the gearbox A963067

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