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Three white plastic toilet fill valves with adjustable height dials

FLUIDMASTER

FLUIDMASTER 3440 Universal Toilet Fill Valve 3-Pack

SKU CH-HEPW-A5081

A universal anti-siphon fill valve three-pack that fits most toilet tanks with adjustable height from 9 to 14 inches

  • SizeUniversal
  • Product type3440
  • Universal fit 9-14 in height adjusts to most tanks
  • Anti-siphon code approved design protects fresh water supply
  • Corrosion resistant plastic build ensures durable long lasting performance
  • Three pack value replaces multiple leaking or noisy valves
  • EZ twist dial simplifies water level adjustment for easy install

Universal toilet fill valve 3-pack

The Fluidmaster 3440 pack contains three universal fill valves designed to repair leaking, noisy or slow-filling toilet tanks. Each valve fits most standard tanks and includes instructions for quick installation. The anti-siphon design prevents fresh water supply contamination and meets code requirements.

3.5 to 7 GPF flow range

The valves operate within a 3.5 to 7 GPF flow range, providing enough water for typical residential flushes while conserving supply. An EZ-twist height adjustment dial sets the valve from 9 to 14 inches, giving headroom for deeper tanks. Corrosion-resistant plastic construction supports long-term durability.

Fits most tanks with EZ-twist height

Universal sizing and the adjustable height let the valve sit in a wide variety of tank depths without extra parts. The anti-siphon feature frees the supply line from back-flow risk, and the included instructions speed up the repair. Builders needing a different flow specification or non-standard thread pattern will need a different valve.

How it compares

Measured against everything we stock in Axes, Hatchets, Picks & Mauls, at today’s prices. Recalculated every night.

Price $21.99
Pricier than about 56% of the 117 comparable items (median $18.99).

Specifications

Product
Brand nameFluidmaster
Product type3440
Size & build
SizeUniversal

Questions about this item

Will the Fluidmaster 3440 fill valve work with my existing 9-inch tall toilet tank?

Yes, the EZ-twist height adjustment ranges from 9 to 14 inches so it fits most standard tanks.

How can I confirm the anti-siphon feature is functioning after I install the 400A valve?

The anti-siphon design is code-approved and prevents backflow automatically; no separate test is needed once installed correctly.

Does the 3-pack include supply lines or mounting hardware, or must I buy them separately?

The pack contains three fill valves with instructions; supply lines and any additional hardware are sold separately.

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