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Fluidmaster® recommends the PerforMAX® fill valve for toilets manufactured from 1994 to the current time (works on older toilets). If you are replacing the fill valve, we recommend you also replace the flapper with the 502 flapper for the ideal performance. The 502 flapper works on both old and new 2 in flush valve toilets. The most powerful toilet fill valve on the market. The 400AH is also known as the 400ARHR. With efficient and ultra-quite fill the 400AH replaces other inefficient or outdated fill valve designs. Help prevent excessive or inadequate bowl fill levels. The 400AH is a code approved, anti-siphon design, that won't contaminate the fresh water supply. Some toilet models not supported - Glacier Bay® or Niagara® flapperless toilets, one-piece toilets.
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Uh oh, it looks like you already have an item in your cart for In-Store Pickup at:
We're constantly working to give you the best hardware shopping experience, but you are only allowed one in-store pickup order at a time. Multiple in-store pickup orders aren't currently supported. Adding the item will clear your current cart and change your pickup location.