Got a tub shower faucet that dribbles and steals water pressure from the shower? The culprit is your tub shower diverter valve. When it's functioning properly, all water is channeled to either the tub or the shower. When it isn't, the tub faucet dribbles, lowering water pressure for the shower. There are two types: a tub spout diverter with a gate valve on a plunger shaft in the spout that's held in the up position (for showers) by water pressure. When the shower's turned off, it drops and reopens the tub spout. To remove for repair, unscrew the tub spout from the threaded water pipe. The other type works by rotating so the valve body opens to either the tub spout or shower pipe. To remove it, unscrew the stem nut and pull out the diverter assembly. Tub diverter spouts and assemblies cost less than $15 at plumbing supply stores. Because there are different types and sizes, take the old one with you for a perfect match. And that's the On The House tip for today.