Use a special cover plate to replace a leaky, old two-handle shower valve with a new scald-proof one-handle valve without tearing out tile or the wall. This is a challenging project.
Unscrew the old handles. Mark the cover hole on the tile and cut it out with an abrasive blade in a jigsaw.
Cut the pipes and remove the old valve. Solder in a new one and screw the conversion plate over the hole.
If your old two-handled shower valve is worn out or leaks, don't despair. You don't have to tear open the tile wall to replace it. The best way to replace it is with a conversion plate. The plate covers the old valve holes and you do the entire job through the hole you cut in the tile. Buy a plate that fits your new faucet and is wide enough to cover the old valve positions. To find a conversion plate, call a plumbing supply store or order online.
This is a challenging project. You may find loose tiles, rusted pipe and other problems.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
You'll also need an abrasive blade for your jigsaw to cut the tile.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.