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Read our comprehensive Toilet Repair Information & FAQs to learn how your toilet works,
how to find the right replacement parts, and how to fix common problems.
Q. "Why is the Fluidmaster 400A considered to be better than the original fill valve provided by the manufacturer?"
A. The Fluidmaster 400A is one of the most reliable valves made for toilets today. The float slides up and down on the cylinder eliminating the bulky old fashioned tank ball that has the capability of interfering with the overflow tube and flapper operation. As the tank fills with water the float rises on the cylinder which puts pressure on the innovative stainless steel control pin that slides through the seal disc. This action allows water to pressurize on top of the seal disc effectively closing the seal disc against the incoming water ports to stop the flow of water. This seal disc operation actually puts less wear and tear on the seal than the fill valves that use a tank rod and ball. Fill valves with a tank rod attached to a tank ball use the water in the tank to leverage the tank ball and rod to exert pressure onto a plunger containing a rubber washer to force the plunger washer to close against the incoming water seat. Return to Replacement Gerber Toilet Fill Valves.
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