The Fluidmaster 703Ap4 Specialty Toilet Fill Valve Is Designed For Use With Product Description Fluidmaster is the number 1 toilet parts brand in the world, selling more than 100 million toilet products annually and selling more toilet-tank replacement parts than any other manufacturer in the world. From the Manufacturer Fluidmaster is the #1 toilet repair brand in the world. Since 1957, we have been guiding our customers to the right toilet repair solutions. Fluidmaster is dedicated to making the installation of its products easy and simple with a complete line of toilet repair parts including: fill valves, single and dual flush valves, flappers, tank levers, toilet seals (bowl wax and wax-free), toilet repair kits, flush valve seals, connectors and more. Fluidmaster parts are found in more toilets than all other brands combined. Fluidmaster distributes to over 90 countries and is the trusted brand by toilet manufacturers and professionals worldwide. A direct replacement for Glacier Bay Niagara Flapperless Toilets Easy-to-install, instructions included Increase your Glacier Bay / Niagara refill speed Restore optimize your toilet to factory performance Replace old or inefficient fill valves with this high-quality replacement part A fast and effective DIY solution to common toilet fill problems