Shower Valve and Tub Repair in Southwest Florida

Why a showerhead keeps dripping after it’s off

A drip from the showerhead after the handle is off means water is getting past the shutoff inside the valve. The showerhead itself is almost never the cause. What’s failing depends on the style of valve behind the wall.

• Single-handle cartridge valves (most homes built from the 1980s on): the O-rings or seals on the cartridge wear, or grit and scale score the cartridge body so it can’t seal against the valve housing.
• Two- and three-handle compression valves (common in older Fort Myers and Punta Gorda homes): each handle closes a stem against a seat. The rubber washer hardens and the brass seat gets pitted. A new washer on a pitted seat will drip again within weeks, so we dress or replace the seat too.
• Ceramic disc valves: the discs rarely wear out, but a chip of debris between them will hold them open a crack.

A short drip for a minute or two after shutting off is just water draining out of the shower arm and head. If it keeps going after ten minutes, that’s a valve problem. Don’t crank the handle harder to stop it. On compression stems that crushes the washer faster, and on single-handle valves it can break the stop on the cartridge.

Temperature swings, cold showers and scalding bursts

Sudden temperature changes have a short list of causes, and we check them in roughly this order.

• Someone flushes a toilet or starts the dishwasher and the shower spikes hot. The valve isn’t compensating for the cold-side pressure drop. Either it’s an old valve with no balancing feature, or the balancing spool inside the cartridge is stuck with scale.
• The shower never gets hot enough. Most single-handle valves have a rotational limit stop on the cartridge that caps how far the handle turns toward hot. It’s often set conservatively at install, or a previous repair put it back in the wrong spot. It can also mean the water heater thermostat is low or a dip tube has failed.
• Hot and cold are backward. A cartridge was installed rotated, or the supplies were piped in reverse. Many cartridges can be turned 180 degrees to correct it.
• Hot, then a slug of cold, then hot again. This is common with tankless heaters. The low-flow showerhead may be near the heater’s minimum activation flow, so the burner cycles. Our water heater service covers that side.
• Temperature drifts slowly over the whole shower. Usually a tank heater running out of hot water, a failing element or burner, or a cross-connection somewhere letting cold water bleed into the hot line.

We test with a thermometer at the showerhead with the handle at full hot. That reading tells us right away whether the limit stop needs adjusting or the problem is upstream at the heater.

Pressure-balancing vs. thermostatic valves, and the anti-scald rule

The Florida Building Code, Plumbing, follows the International Plumbing Code on this point: individual shower and tub-shower valves have to be pressure-balance, thermostatic mixing, or combination pressure-balance/thermostatic valves meeting ASSE 1016 (also listed as ASME A112.1016/CSA B125.16). They have to be installed and set so the outlet temperature is limited to a maximum of 120 degrees F. Tub filler valves that aren’t on a shower valve need their own temperature-limiting device to ASSE 1070, set to that same 120 degree maximum.

In practice that means when we replace a whole valve body, the new one has to be one of these types. Replacing a cartridge in an existing compliant valve keeps it compliant, as long as the limit stop is set properly afterward.

For a standard tub-shower in a Cape Coral or Lehigh Acres house, a pressure-balancing valve does the job. Thermostatic valves make more sense in a large walk-in shower with a rain head, handheld and body sprays, or where the household includes young kids or older adults who can’t react fast to a hot burst.

Cartridge replacement across valve brands

Most single-handle shower valves are cartridge valves, and each manufacturer uses its own cartridge shape, spline count and retaining method. They aren’t interchangeable. The trim on the wall is the fastest way to identify the valve, but trim gets swapped during remodels, so we confirm by pulling the handle and looking at the cartridge and retaining clip or bonnet nut.

• Some brands use a cartridge held in by a U-shaped clip at the top of the valve body. These can seize in hard water and need a puller tool to extract without damaging the brass.
• Others use a bonnet nut threaded over the cartridge, with separate seats and springs at the hot and cold inlets. Worn seats and springs are a common source of drips on these.
• Older two- and three-handle valves use threaded stems that come in dozens of lengths and broach patterns. Matching an old stem sometimes takes the original in hand.
• Builder-grade house brand valves may only have one or two cartridge options, and some discontinued models no longer have parts. When that happens, the realistic fix is a new valve body.

Before pulling a cartridge, we shut off water to the valve. Many valves have built-in stops behind the trim, and many older homes don’t, in which case we shut off at the main. Our plumbing glossary has a quick reference on cartridge and valve terms if the parts store asks you questions you can’t answer.

Tub spout diverters

If water keeps pouring out of the tub spout when you’ve pulled the diverter to send it to the showerhead, the diverter gate in the spout is worn or scaled up. On most tub-showers the diverter is part of the spout itself, so the fix is a new spout.

The catch is matching how the spout attaches. Some screw onto a threaded pipe nipple. Others slide over a copper stub and lock with a set screw on the underside. A slip-on spout installed on a pipe that’s cut too short or too long won’t seal, and water escapes behind the spout into the wall. That’s one of the more common hidden leaks we find in tub-showers, and it often shows up as swelling at the bottom of drywall or baseboard next to the tub.

Three-handle valves have the diverter as the middle handle, and that stem gets a washer and seat like the hot and cold stems do.

Leaks behind tile and in-wall valve access

Not every wet spot behind a shower is the valve. Water gets into walls through a few paths, and each points to a different repair.

• Valve body or supply joints: leaks whether or not the shower is running. A water meter test, with every fixture off, will often catch this.
• Shower arm or head connection: leaks only while the shower is on. Usually a loose drop-ear elbow or a failed thread seal on the arm.
• Trim and escutcheon: water running down the wall gets behind a trim plate that was never caulked or sealed at the top.
• Grout, tile and the shower pan: leaks only when the floor or walls get wet. A failed pan liner or a cracked tile is a tile and waterproofing problem, not a valve problem, though we can confirm which it is.

Many homes have the back of the shower wall in a closet or hallway. If there’s no access panel, we cut a clean opening there rather than through tile, and finish it with a removable panel so the next repair doesn’t need another hole. If the valve backs up to an exterior concrete block wall, as it does in plenty of Southwest Florida ranch homes, access from behind isn’t an option, and we work through the tile with an oversized trim plate to cover the opening.

When the source isn’t obvious, our leak detection service uses moisture meters, thermal imaging and isolation testing to find it before anything gets cut.

Slab homes and tub drains

Nearly every house in Cape Coral, Lehigh Acres and Port Charlotte sits on a concrete slab. Tub drains in these homes run below the floor. The builder leaves a blockout in the slab under the drain end of the tub, a box of sand or open dirt where the trap sits, so the tub waste and overflow can connect.

The tub waste and overflow assembly uses slip joints and gaskets, and those dry out and loosen over decades. A leak there drips into the blockout and doesn’t show inside the house. Signs are a musty smell near the tub, a soft or discolored floor at the drain end, or termite and ant activity drawn by the moisture. Reaching it means removing an access panel if one exists, or pulling the tub.

If you have a leak in the floor near the tub that doesn’t line up with the drain, or a meter that moves with everything off, it may be a supply line under the slab, which is a different repair. See slab leak repair for how we handle those.

Converting a tub to a walk-in shower: the plumbing side

Tub-to-shower conversions are popular in Southwest Florida, especially for owners planning to age in place. The tile is what people picture. The plumbing is what sets the budget and the schedule.

• Drain location: the tub drain is at one end, near the wall. A shower drain usually needs to move toward the center of the new pan, or to a linear drain along one edge. On a slab, that means cutting concrete and re-trenching.
• Drain and trap size: tubs are typically on a 1-1/2 inch trap. A walk-in shower is commonly piped with a 2 inch drain and trap, so the line often gets upsized as far back as the branch.
• Curbless entry: a zero-threshold shower on a slab needs the slab recessed so the pan can slope to the drain without the floor ending up higher than the bathroom. That’s more concrete work.
• Valve changes: the old tub-shower valve has a lower outlet feeding the spout. Some valves let you cap that port; others aren’t designed to run without a spout and should be replaced. Adding a handheld or second head usually means a diverter or a thermostatic setup.
• Pan liner: a site-built pan uses a liner turned up the walls above the finished threshold, with the floor sloped toward the drain. We coordinate the drain body with whoever does the pan so the weep holes and clamping ring are set right.
• Permits: moving drains and replacing valves in a remodel generally requires a plumbing permit from the city or county. A simple cartridge swap does not.

For the bigger picture on bathroom remodels, see plumbing renovations. Our bathroom plumbing page covers the rest of the room, including toilets and vanities.

Scale in showerheads and valves

Mineral scale is the reason a lot of shower parts fail early here. The aquifers that supply the region are limestone, and homes on private wells, which are common in Lehigh Acres, Alva and parts of North Fort Myers, often deal with harder water and iron than homes on city water.

In a showerhead, scale closes the spray nozzles one by one until the pattern is uneven and the pressure feels weak. Federal rules already cap showerheads at 2.5 gallons per minute, and many new heads flow less, so there’s not much margin before buildup makes a shower feel weak. Soaking the face of the head in white vinegar overnight dissolves light scale. Heavy buildup, or a head with a clogged flow restrictor, is usually easier to replace.

Inside the valve, scale seizes cartridges in the housing and jams the pressure-balancing spool. That’s when you get a handle that’s stiff to turn or a temperature that won’t hold. If you’re replacing cartridges every few years, treating the water is likely a better use of money. Our water softeners and filtration page explains the options.

Condos: leaks into the unit below

In a condo, a shower leak rarely stays in your unit. Water runs along the concrete floor slab and comes through the ceiling of the unit below, often at a light fixture or along a wall. Sometimes it shows up one unit over from where it started.

Shower leaks in condos tend to come from three places: a failed pan or tile seal, a valve or arm connection in the wall, and the drain connection where it passes through the slab. We run the shower and fill the pan separately to isolate which one it is, because the repair, and often who’s responsible for it, depends on the answer.

Your declaration and the association’s rules decide which pipes and fixtures belong to you and which belong to the association. Most associations want notice before work starts, and some require that the plumber be insured and provide proof. We work with association managers on those requirements. Our condo plumbing page has more on working in buildings, including water shutoffs that affect a whole stack.

Symptoms and likely causes

Use this as a starting point. Several of these have more than one possible cause, and we confirm before replacing parts.

What happens when we come out

We start by asking what the shower does and when, then run it and watch. We’ll pull the handle and trim, identify the valve, and check whether it has built-in stops. If the fix is a cartridge or stem rebuild, we’ll tell you what part it needs. Common cartridges are easy to find; older or discontinued valves may take time to source, and we’ll say so up front.

If the valve body is corroded, discontinued, or not one of the code-compliant types, we’ll explain what replacing it involves, including access from behind or through the tile. Our what to expect on a plumber visit guide walks through the rest. Office hours are Monday to Friday, 8am to 5pm. Outside those hours we take urgent calls by phone when we can.