Shower Plumbing near you

Most shower valves are one of two kinds. A pressure-balancing valve reacts to changes in water pressure: when someone flushes a toilet and the cold-water pressure drops, it cuts back the hot side to match, so the shower doesn't suddenly turn scalding. A thermostatic valve senses temperature instead and holds the mix you set, and it usually separates temperature from volume, so you can turn the flow down without changing how hot it is.

Hot water has to be hot at the heater and safe at the showerhead, and those are two different settings. The Government of Canada recommends keeping the water heater at 60°C (140°F) to prevent the growth of bacteria such as Legionella, and installing automatic mixing valves on showers, tubs and faucets, or an anti-scald mixing valve at the water heater, set to deliver hot water at 49°C (120°F). It also warns that a child's skin burns in a quarter of the time it takes an adult's.

Plumbing codes set requirements for temperature control in new showers, and a licensed plumber will install a valve that meets the local code and set its limit stop. If an older shower still has two separate handles, or jumps from hot to cold whenever another fixture runs, that's a good reason to replace the valve, especially in a home with young children or older adults.

A shower can go almost anywhere a drain can reach. It needs a trap directly below the drain, waste pipe sloped toward the stack, and a vent that keeps the trap's water seal from being siphoned away. In a wood-framed house that means running pipe through or between joists; in a basement it often means cutting the slab to reach the drain line beneath it. Because this changes the drain and vent system, it calls for a licensed plumber and, in many municipalities, a permit.

The shower floor matters just as much. Whether it's a prefabricated base or a mortar bed under tile, the pan has to slope evenly to the drain so water doesn't pond in the corners.

For the plumber, a linear drain changes where the trap goes. The channel runs along a wall or across the entrance, and its outlet has to line up with a trap and waste line below, often in a joist bay that must be free of framing. A curbless entry also puts the drain lower than in a standard shower, so the floor can slope to it without a step. Ask whether the drain chosen can keep up with every outlet running at once, particularly with a rain head.

Recessing the subfloor, reinforcing joists and carrying the waterproofing beyond the shower area are part of a bathroom renovation, where the plumber, the framer and the tile setter plan the work together.

The membrane behind the tile is usually installed by the tile setter or renovation contractor, but it only works if the plumbing suits it. The drain has to match the membrane system, with a flange or clamping ring the membrane can bond or seal to; the valve and shower arm need openings that can be sealed with the gaskets or collars made for them; and nothing should pierce the membrane that wasn't planned.

Before the walls close, ask the plumber to pressure-test the new supply piping and confirm the drain connection is sound. A leak caught at that stage means an afternoon of work, not a tiled wall coming down.

A shower leak can come from the supply piping, the valve body, the drain connection or failed waterproofing, and each is repaired differently. A plumber or leak detection specialist can narrow it down before any tile comes off.

The showerhead is the easiest part of shower plumbing to change, and one of the most effective for water use. The Capital Regional District in British Columbia notes that high-efficiency showerheads use between 5.6 and 7.6 litres per minute, compared with up to 20 litres per minute for older models. Federal energy efficiency regulations now cap showerheads manufactured on or after July 1, 2026 at 7.0 litres per minute, measured at a standard test pressure. Less hot water used also means less work for the water heater.

If a new efficient head feels weak, clean its nozzles and check that the shower valve and shut-offs are fully open before blaming the head; in hard-water areas, mineral scale clogs the nozzles over time.