Will this work as a replacement to the fluidmaster model 300 fill valve?
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Yes it will, the Universal Fit Adjustable Toilet Fill Valve (model 400A) is the direct replacement for all 300 model valves that come installed in toilets. For additional questions on this Fluidmaster product contact us at your earliest convenience. Fluidmaster’s Technical Service Department is available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.
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