- 1). Turn off the water supply to your system. Disconnect the city water hose, and remove the breaker to the on-demand 12-volt water pump to ensure it cannot function.
- 2). Consult the manufacturer literature delivered with your RV to find the location of the shower access panel. Typically, the shower access panel will be a round plate in the preexisting shower stall, or a square plate on the outside of one of the enclosure walls surrounding the preexisting shower stall. Remove the access panel.
- 3). Disconnect the preexisting shower feed pipes, the vacuum breaker and the hot and cold pipes from the faucet assembly.
- 4). Remove the preexisting shower stall, being careful not to damage the plumbing and waste fixtures and the enclosure walls. The shower stall may be held in place by trim around the front, or by brackets securing it to the walls that can be accessed through a panel beneath the faucet or screwed to one of the walls. There may be a double-sided adhesive pad between the underside of the shower pan, and there may be hidden fasteners behind a mirror or shelving. If a retro-fitted shower curtain rod or non-standard shelving is in place, remove these items first.
- 5). Use your tape measure to record the exact dimensions of the enclosure walls up-and-down, side-to-side and front-to-back. Purchase a replacement from an RV-supply store or a home-improvement warehouse. Typically, there will be little difference in weight between a household shower stall and one manufactured for RV installation; the dimensions are the overriding imperative.
- 6). Purchase a replacement unit designed to install without the use of caulk or multiple internal trims. Shower stalls with integral, wipe-clean shelving are an asset. Choose a color that will blend in with the rest of your RV's décor, especially furnishings and decoration in the same immediate area as the shower stall.
- 7). Install the new shower stall exactly as directed by the manufacturer, rather than as a reversal of the sequence in which you removed the old unit. The instructions will dictate an installation sequence that makes the new shower stall or its component pieces easiest to maneuver. The instructions will also make it difficult to omit any vital plumbing connections or safety measures. Pay particular attention to the systems that deliver water and remove it to waste.
- 8). Trim or caulk the edges of the fiberglass panels if necessary. Fit a shower curtain or concertina door according to the manufacturer's literature. Ensure there is some form of securing strap or locking feature so the curtain or door cannot move freely when the RV is moving. Allow all sealants to dry thoroughly before using the new shower stall.
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