The 400A toilet fill valve was introduced in 1975 and is the #1 selling fill valve IN the world. It fixes noisy and slow filling toilets. Best for toilets manufactured prior to 1994 that have 3.5 - 7 GPF.

Ball Cock Toilet Tank Fill Valve

• The #1 solution to fix noisy and slow filling toilets
• Easy to install, Universal fit
• EZ-Twist height adjusts from 9 - 14 IN to fit most toilets
• Corrosion-resistant material
• 5 YR warranty

• Instruction/Installation Manual https://www.macombgroup.com//ASSETS/DOCUMENTS/ITEMS/EN/Fluidmaster_400 A_Instruction_Installation_Manual.pdf