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The best lavatory stall parts you can buy

AI-generated summary · updated August 10, 2026 · verify details before purchase.

  1. Kohler K-4434 Flush Valve Kit
    Best overall Kohler

    Kohler K-4434 Flush Valve Kit

    4.4/5 $66.23

    Durable all-metal construction with reliable performance; compatible with most two-piece toilets.

    • Solid metal build
    • Easy to install
    • Universal fit
    • Higher price
    • May need adjustment
  2. Fluidmaster 400CRH PerforMAX Universal Toilet Fill Valve
    Best value Fluidmaster

    Fluidmaster 400CRH PerforMAX Universal Toilet Fill Valve

    4.6/5 $14.97

    High-performance fill valve with quiet operation and anti-siphon features; extremely popular.

    • Quiet fill
    • Durable
    • Widely compatible
    • Plastic construction
    • Some report noise
  3. TOTO WSW3091 Water Saving Flush Valve
    Best premium TOTO

    TOTO WSW3091 Water Saving Flush Valve

    4.5/5 $168.48

    Precision-engineered flush valve for TOTO toilets; offers consistent water saving performance.

    • High quality
    • Efficient
    • Long lasting
    • Only for TOTO
    • Expensive
  4. Korky 2000BP Toilet Tank Flapper
    Best budget pick Korky

    Korky 2000BP Toilet Tank Flapper

    4.5/5 $9.98

    Universal fit red flapper with adjustable chain; reliable seal and easy replacement.

    • Very affordable
    • Universal fit
    • Good seal
    • Plastic hinge
    • May need periodic replacement
  5. Danco HydroRight Toilet Flush Valve
    Best for dual flush Zurn

    Danco HydroRight Toilet Flush Valve

    4.3/5 $114.16

    Converts standard toilets to dual flush; saves water with two-button system.

    • Water savings
    • Dual flush option
    • Easy conversion
    • Compatibility issues
    • Plastic parts
  6. American Standard 738123-0070A Flush Valve Kit
    Best for American Standard toilets American Standard

    American Standard 738123-0070A Flush Valve Kit

    4.4/5 $64.99

    OEM replacement kit designed specifically for American Standard toilets; ensures perfect fit.

    • Exact fit
    • Reliable
    • Easy installation
    • Brand specific
    • Moderate cost

Buying advice

When choosing lavatory stall parts, prioritize compatibility with your toilet model. Check the fill valve height and flapper size. Metal components tend to last longer but plastic is more budget-friendly. Look for WaterSense certification for efficiency. Reading recent reviews helps identify common installation issues.

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