Toilet Fill Valve - How To Replace A Toilet Fill Valve

Set the fill valve into the toilet tank. Make sure the nipple is facing the overflow tube. Tighten the nut under the toilet tank by hand until firm. Then use pliers to tighten just a little more.

Reconnect the water supply line to the fill valve. Once again you can hand tighten first and then use pliers to tighten a little more.