Fluidmaster Toilet Fill Valve (400ACN3P5)

Item no: 4525366 | 039961400031
200  Estimated 

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  • 3 pack
  • Universal fit for 1 and 2 piece toilets
  • Height adjusts from 9" to 14"
  • Corrosion resistant material
  • Anti-siphon operation
  • Easy to install
  • Quietest fill valve available
  • Refills quickly
  • Won't contaminate fresh water supply
  • Fuildmasters best selling 400A fill valve

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What people are saying

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FLUIDMASTER 1021686Fluidmaster Toilet Fill Valve (400ACN3P5)

(based on 3 reviews)

Ratings Distribution

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  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

Displaying reviews 1-3

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(1 of 1 customers found this review helpful)


Easy to install

By Diyer

from Mn

About Me Midrange Shopper


  • Durable
  • Easy To Assemble


    Best Uses

    • Bathroom

    Comments about FLUIDMASTER 1021686 Fluidmaster Toilet Fill Valve (400ACN3P5):

    Works great, very easy to install and quiet.

    • I Am A:
    • Family Older Kids

    (1 of 1 customers found this review helpful)


    Cheaply made, design has gone downhill

    By DIY Dan

    from Chicagoland, IL

    About Me High-end Shopper


    • Filled toilet in less than 90 seconds


    • Difficult to adjust initial height
    • Flimsy
    • Instruction sheet too small to read.
    • The only thing available at reasonable price

    Best Uses

    • Bathroom

    Comments about FLUIDMASTER 1021686 Fluidmaster Toilet Fill Valve (400ACN3P5):

    Not much of a selection is out on the home improvement center shelves anymore. This used to be a well built product. Now it is all plastic with sloppy tolerances especially in the adjustment areas. I destroyed one of these valves trying to adjust the initial height adjustment because IT JUST PLAIN JAMMED. I would only recommend this product because there is practically little choice out there.

    • I Am A:
    • Family Older Kids

    Easy Installation, Quiet Refill, Powerful Flow

    By Dave O.

    from San Jose, CA


    • Delivers powerful flush for 1.6 or lower GPFs
    • Easy twist height adjusts from 10" to 15"
    • Fast bowl refill
    • Includes water saving roller clamp
    • Quiet, powerful water flow


      Best Uses

        Comments about FLUIDMASTER 1021686 Fluidmaster Toilet Fill Valve (400ACN3P5):

        I am really happy with my choice to get a Fluidmaster High Performance Toilet Fill Valve. It is made with top quality materials and built to last for years of trouble free performance. I got my new fill valve after my old toilet fill valve was starting to malfunction and was not refilling my tank. My new Fluidmaster PerforMAX Toilet Fill Valve was super easy to install with its easy twist height adjustment to fit my standard 1.6 gallon toilet, then simply connecting the shank to the tank by securing the shank washer between the locknut and hand tighten until secure, be sure to leak test, then connect the refill tube to the overflow pipe and adjust the roller clamp to your desired water savings level. Detailed instructions with pictures are included, along with a toll free customer support number available M-F 5:30 a.m. to 5 p.m. PST. Fluidmaster gives you a 7 year warranty. I highly recommend the Fluidmaster PerforMAX Toilet Fill Valve.

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        • No

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