The exposed deck has a chrome housing above the sink, while the concealed deck has only a flange exposed just below the faucet handles. All faucets come with manufacturer's installation instructions. Read these instructions carefully and follow each step for a good installation. If instructions are unavailable, you can follow the same basic instructions given for installing a lavatory faucet. The first challenge in installing bath and shower faucets is getting the faucet assemblies behind the wall.
Most home builders provide a rear access panel.
By removing this panel, you can connect fittings without defacing the bathroom wall. These panels are usually located in closets in back of the tub. The two- valve faucet assembly is the most common assembly for bath tubs. If instructions are unavailable, study Figure 11 to help you make such an installation without too much trouble. The two- valve shower assembly is the basic faucet arrangement used only for shower assemblies.