We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black plastic and rubber fill valve with refill adjustor tool

Korky

Korky 528PRO Fill Valve toilet accessory

SKU CH-KH1M-1QBBS

Universal-fit fill valve in plastic and rubber with refill adjustor tool, UPC and ASSE compliant, seven-year warranty

  • TypeRegular
  • Universal fit for easy replacement
  • Adjustable refill tool for precise water level
  • UPC and ASSE certified for code compliance
  • Durable plastic and rubber construction
  • Seven-year manufacturer warranty included

Universal Fit and Compliance

The Korky 528PRO fill valve fits universal toilet tanks and meets UPC and ASSE standards. Constructed from plastic and rubber with a black finish, it includes a refill adjustor tool for setup. This component is intended for residential toilet repair and replacement projects.

Simple Installation With Adjustment

Installation follows standard fill valve procedures using the included refill adjustor tool to set the water level. The universal fit design suits most common tank configurations without modification. A common issue occurs if the adjustor is not set correctly, leading to continuous running or insufficient tank fill.

Reliable Long-Term Operation

The valve is built to maintain consistent shut-off and refill cycles over extended daily use. Materials resist typical wear from water exposure and mineral deposits. A seven-year manufacturer warranty period reflects the expected service life under normal household conditions.

Highlights

  • Universal fit for easy replacement
  • Adjustable refill tool for precise water level
  • UPC and ASSE certified for code compliance
  • Durable plastic and rubber construction
  • Seven-year manufacturer warranty included

Specifications

BrandKORKY
TypeRegular

Questions about this item

How can I confirm the 528PRO fill valve is working correctly after installation?

After installation, check that the tank fills to the proper level without overflowing and that the valve shuts off cleanly; the included refill adjustor tool lets you fine-tune the water level to match the tank's fill line.

What comes in the box with the 528PRO fill valve and what must be purchased separately?

The package includes the fill valve body and a refill adjustor tool; supply lines, mounting hardware, or tank-to-bowl gaskets are not included and must be bought separately if needed.

Which version of the Korky 528PRO fill valve should I choose for my toilet?

The 528PRO is a single universal-fit model supplied in black plastic and rubber that meets UPC and ASSE standards, so there are no alternate versions or capacities to select from.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.