Fluidmaster

Fluidmaster, Inc. is the world's leading manufacturer of toilet repair parts, founded in 1957 by Adolf Schoepe in San Juan Capistrano, CA. Fluidmaster fill valves are installed in approximately 90 percent of new U.S. toilets. The company serves more than installations annually in residential, commercial, and institutional markets worldwide.

Product Lines

• 400A Universal Fill Valve: For pre-1994 toilets, 3.5-7 GPF; adjustable 9-14 inches height; operating pressure 0.2-15.85 bar (3-230 PSI); anti-siphon design
• 400H PerforMAX Fill Valve: For modern 1.28-1.6 GPF toilets; independent bowl and tank adjustment; vortex refill technology; 4 GPM flow rate; 7-year warranty; adjustable 9-14 inches
• Flush valves, flappers, ballcocks, repair and tune-up kits, water supply connectors
• Wax seals and wax-free toilet seals for installation
• PRO Series: Commercial-rated components for high-volume institutional applications

Why Plumbers Specify Fluidmaster

• 90% market penetration in new U.S. toilets; stocked by virtually every plumbing supply house nationwide
• Universal compatibility covers ~95% of residential toilet designs from the 1950s forward; one SKU handles most service calls
• OEM-specified by Kohler, American Standard, Glacier Bay, and Mansfield
• 400H: 7-year warranty provides documentable coverage for homeowners
• Tool-free installation with twist-lock height adjustment; reduces labor on service calls

How to Choose Fluidmaster Products

Pre-1994 or 3.5+ GPF toilets: specify 400A Universal. Modern 1.28-1.6 GPF toilets: specify 400H PerforMAX with independent bowl/tank adjustment and vortex refill. Flush valve/flapper replacement: match flush valve seat diameter (2-inch or 3-inch) and toilet brand. Full tank rebuild: use Fluidmaster combination repair kits. Commercial/institutional: specify PRO Series.

Frequently Asked Questions

• Founded? 1957 by Adolf Schoepe, San Juan Capistrano CA. Pilot-operated fill valve design using water pressure more efficiently than existing float-ball technology.
• 400A vs 400H? 400A: pre-1994 toilets, 3.5-7 GPF, 0.2-15.85 bar. 400H: modern 1.28-1.6 GPF, independent adjustments, vortex refill, 4 GPM, 7-year warranty.
• Market share? ~90% of new U.S. toilets; 100+ million installations annually.
• OEM specs? Kohler, American Standard, Glacier Bay, Mansfield among others.
• Warranty? 400H: 7-year limited. Other models vary by product line.