Float Arm Clamp-On Coin Ballast Weight
A clamp-on weight for old ballcock and float-arm toilet fill valves that don't shut off fully, so the tank keeps running. It's a 64 x 34 x 30 mm block. The float rod sits in a V-channel that takes any rod from about 5 to 9 mm and is locked in place by a sideways M4 set screw. Four covered slots hold up to 16 US quarters or other coins/washers up to 25 mm across, and two zip ties in perimeter grooves keep the coins and the rod in place.
bathroom toilet float-arm ballast