Collection: Shower Valves & Parts

The valve and the trim must be the same brand, and usually the same series. A rough-in valve is a manufacturer-specific casting with its own cartridge, port layout and mounting depth. A Riobel trim will not fit a Delta valve. Frequently, a current trim will not fit that same brand's previous-generation valve either.

This is why buying the valve is a decision about the next twenty years, not just this renovation. Choose the brand you want to live with, then buy both halves from it.

• Pressure-balance — holds the hot/cold ratio steady when pressure changes elsewhere in the house. Protects against scalding. One outlet, one handle. The standard choice for a simple shower.
• Thermostatic — holds an actual set temperature and supports several outlets at once. Necessary for a rain head plus a handheld plus body sprays.
• Thermostatic/pressure-balance combined — separate temperature and volume controls. The most common choice in a well-specified bathroom.
• Diverter and volume control valves — a diverter switches flow between outlets one at a time; a volume control runs two at once and sets each independently. Decide which you need before the wall closes.
• Tub filler valves — floor-mount, wall-mount and deck-mount rough-ins, each specific to how the filler is mounted.
• Wall-mount lavatory valves — the in-wall half of a wall-mounted bathroom faucet.

• Depth. Valves have a set mounting range relative to the finished wall — tile, backer and thinset included, not the studs. Set too deep and the trim will not reach; too shallow and it stands proud.
• Orientation. Most valves are marked for up. Fitting one rotated will invert hot and cold or leave the trim crooked.
• Outlet count. A two-outlet valve cannot later feed three. Adding a body spray afterwards means opening the wall.

Many valves ship with a plaster guard — leave it on through tiling. It protects the cartridge and sets the finished depth for you.

If you are trying to identify an existing valve, photograph the trim plate and, if you can reach it, the back of the escutcheon and the cartridge. Send it to us. In many cases we can match a trim to the valve you already have without opening the wall — see Shower Components & Trim Kits.

We are an authorized dealer for every brand on this page, which is what makes older valve cartridges obtainable at all — and it is the reason to buy a valve from one. Over 3,000 of our products ship free anywhere in Canada; look for the free-shipping badge on the product page. Everything ships free within Ontario, and any order over $3,000 ships free Canada-wide.

Also see: Shower Kits · Shower Faucets & Trims · Components & Trim Kits · Installation Systems & Parts

What is a rough-in valve?
The part of the shower that goes inside the wall before tiling. It controls temperature and flow; the trim you see afterwards is fitted to it.

Can I use any trim with any valve?
No. Trim is matched to a specific valve body from the same manufacturer, and often to a specific generation. Mixing brands does not work.

How do I identify the valve already in my wall?
Photograph the trim plate, and the back of the escutcheon and the cartridge if you can reach them. Send it to us and we will usually identify it — which means a new trim without opening the wall.

Thermostatic or pressure-balance?
Pressure-balance is sufficient for a single shower head. Thermostatic is needed to run several outlets at once and holds an exact set temperature.

What is a plaster guard?
The plastic cover shipped on many valves. Leave it in place through tiling — it protects the cartridge and sets the correct depth relative to the finished wall.