The Korky 528PRO Fill Valve (10125PRO) is engineered for plumbers and homeowners who want professional-grade toilet repair performance. Built in the USA with high-quality materials, this valve is part of Korky’s Pro Series, designed specifically to withstand the rigors of daily use while offering easy installation, precise adjustment, and long-term reliability.
Unlike many standard valves, the 528PRO offers universal compatibility, making it suitable for most 2-piece and 1-piece toilets, including both newer high-efficiency models and older standard flush units. It is fully adjustable from 7.75” to 13.5”, allowing it to fit virtually any toilet tank size with ease.
The standout feature of this valve is its innovative twist-lock adjustment. Instead of requiring tools or complicated steps, users can simply twist the body of the valve to achieve the correct height and water level, saving valuable installation time. This makes it an excellent choice for professional plumbers who need efficiency on every job, as well as for DIY homeowners who want a simple fix without stress.
Durability is another strength of the Korky 528PRO. The valve is constructed from chlorine- and hard water-resistant materials, making it ideal for Canadian and North American homes where water quality can vary. The seal is crafted with a proprietary rubber blend that outlasts common fill valve seals, providing a longer service life and fewer callbacks for professionals.
The quiet fill technology reduces noise when refilling the tank, creating a more pleasant bathroom experience. Additionally, the valve has built-in anti-siphon protection, ensuring compliance with plumbing codes and preventing backflow contamination into your household’s clean water supply.
Installation is quick and straightforward. The 528PRO includes a refill tube, angle adapter, and easy-to-follow instructions. Most replacements take less than 10 minutes with just basic hand tools, making it one of the most user-friendly solutions on the market.
Trusted by plumbing professionals across North America, the Korky 528PRO Fill Valve – 10125PRO is the go-to solution when performance, reliability, and ease of installation are non-negotiable. It delivers water-saving efficiency, robust construction, and professional-grade reliability, all in one universal package.
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