A shower renovation is one of the most satisfying home upgrades — new tile, a frameless glass door, a rainfall showerhead. What homeowners discover once the walls are open, however, sometimes changes the scope (and budget) of the project significantly. Understanding the plumbing that lives behind your shower walls before the tile comes off leads to better decisions, fewer surprises, and cleaner outcomes.
During an Atlanta shower renovation, homeowners should understand the critical plumbing components behind the walls, which include the shower valve, supply lines, shower arm, and drain assembly. The shower valve is particularly important, as older Atlanta homes often have two-handle valves from before the 1980s or single-handle valves that lack modern pressure-balancing or anti-scald protection, which federal standards now require. Additionally, supply lines, especially polybutylene pipes used widely from the late 1970s through mid-1990s, should be inspected and potentially replaced due to known failure risks. Addressing these elements during a renovation prevents future issues and ensures compliance with current codes.
What’s Actually Behind the Shower Wall
A typical Atlanta shower has several plumbing components in the wall cavity:
- The shower valve: The valve body that controls both water temperature and flow rate. This is the most important mechanical component in the shower and the one most likely to need attention during a renovation.
- Supply lines: Hot and cold lines running from the home’s supply system to the valve body.
- The shower arm and flange: The pipe stub-out that the showerhead connects to.
- Drain assembly: Below the floor, connecting the shower pan drain to the home’s drain system.
What Shower Valve Decisions Should You Make During an Atlanta Shower Renovation?
During an Atlanta shower renovation, you should evaluate your shower valve to ensure it meets modern safety and performance standards. Key decisions involve upgrading from older two-handle or single-handle valves to modern pressure-balancing or thermostatic valves. Older Atlanta homes often have two-handle valves (pre-1980s) lacking pressure-balancing protection, or older single-handle valves without anti-scald features. Federal standards now require pressure-balancing valves in new installations, making renovation an ideal time to upgrade. Modern pressure-balancing valves (like Moen, Delta, Kohler, standard Atlanta choices) maintain consistent temperature, while thermostatic valves offer precise temperature control, ideal for multi-spray systems. Replacing the valve when walls are open is significantly less costly than later.
Older Atlanta homes frequently have:
- Two-handle valves: Separate hot and cold handles, common in homes built before the 1980s. These work but lack pressure-balancing protection, meaning a toilet flush or another fixture activating can cause sudden temperature spikes in the shower.
- Older single-handle valves: May lack anti-scald protection. Federal standards require pressure-balancing valves in new shower installations, and renovations are typically a trigger to bring the installation up to current code.
A modern pressure-balancing valve (Moen, Delta, Kohler are the standard Atlanta choices) maintains shower temperature within a few degrees even when other fixtures run. It’s the baseline standard for any renovation, and upgrading during an existing renovation adds a small additional cost in parts — a small investment given that the wall is already open.
Thermostatic valves — which maintain precise temperature by mixing hot and cold water at a preset ratio — are a premium option for master bath renovations and work especially well with multiple body spray configurations or rain showerheads with high flow requirements.
What Should You Know About Supply Line Condition During an Atlanta Shower Renovation?
During an Atlanta shower renovation, assessing supply line condition is crucial, as it determines whether lines can be reused or need replacement. Once the wall is open, your plumber or tile contractor can identify the type and state of the supply lines. For older Atlanta homes, galvanized steel supply lines may be corroded and should be repiped. Copper lines in good condition can typically be reused. Critically, polybutylene supply lines (gray plastic pipes common in Atlanta homes from the late 1970s to mid-1990s) should always be replaced when accessible due to their known failure rate and discontinued production.
- Galvanized steel supply lines in an older Atlanta home may be corroded enough that the renovation is a good time to repipe that section
- Copper lines in good condition can be reused
- Polybutylene supply lines (a gray plastic pipe used widely in Atlanta homes from the late 1970s through mid-1990s) should always be replaced when accessible — the material is known to fail and is no longer produced
Drain Work in a Shower Renovation
If you’re changing the shower pan — particularly converting from a prefab shower base to a custom tile floor — the drain location matters. A prefab base has the drain at the center; a custom tile shower can have the drain in various positions depending on the slope design. Moving a drain even a few inches requires opening the floor and rerouting the drain line, which adds meaningful cost to the renovation.
For tile showers, the drain assembly needs to be compatible with the tile/mortar bed installation. Linear drains — which run along one wall and allow large-format tile without cuts — are a popular design choice in Atlanta renovations but require a different slope direction in the subfloor. Discuss the drain location with your plumber before your tile contractor begins work.
Adding a Bodyspray System or Rainfall Showerhead
Multi-outlet shower systems — rain showerheads, body sprays, handheld wands — have aggregate flow rates that can significantly exceed a standard shower supply line’s capacity. A 3/4-inch supply line to the shower handles the flow; a 1/2-inch line may not, particularly if the system has four or more outlets.
Thermostatic valves designed for multi-outlet systems solve the temperature control problem; the supply line size solves the flow problem. Both should be evaluated by a plumber during renovation planning, not discovered when the new fixtures are installed and the water pressure is disappointing.
Permitting in Atlanta
A cosmetic shower renovation — replacing tile and fixtures without moving the valve or drain — typically doesn’t require a permit. Any work that involves moving the valve, relocating the drain, changing the supply line configuration, or converting to a different shower configuration (bath-to-shower, expanding the size) usually requires a plumbing permit. Fix and Flow handles all necessary permits for the plumbing scope of shower renovations.
How Can Fix and Flow Plumbing Help with Your Atlanta Shower Renovation?
Fix and Flow Plumbing can help with your Atlanta shower renovation by handling all the essential plumbing aspects, including valve replacement, supply line work, drain relocation, and permit management. We specialize in the plumbing side of shower renovations across Atlanta. To discuss what your renovation involves before the tiles come off, visit our shower and bathtub repair page or call us at (404) 800-FLOW.