Concealed Valve

A concealed valve does its work inside the wall, with only the handle and the wall flange visible. This range covers the two types used in an Indian bathroom: concealed stop valves in 15 mm and 20 mm, which isolate or control a line - a shower, a geyser feed, a basin supply - and 25 mm concealed flush valves, which flush a wall hung or floor-mounted toilet directly from the supply line in place of a cistern. All are chrome finished and run across five design series, so the handle and flange can be matched to the rest of the CP fittings in the bathroom. Prices sit in a narrow band, from around ₹1,140 for a 15 mm stop valve to about ₹1,600 for a 25 mm flush valve.

How to choose a concealed valve

  • Get the size right first. The size is the pipe bore, not the handle. 15 mm suits a basin or a single outlet; 20 mm suits a shower or a heavier draw; 25 mm is the flush valve size for a toilet. A flush valve will not work on a 15 mm line.
  • Stop valve or flush valve. A stop valve controls or shuts off a supply. A flush valve delivers a measured flush to a toilet pan. They are not interchangeable.
  • Check that the flush valve suits your toilet. Flush valves need adequate flow to work - they draw straight from the line rather than from a stored tank. A toilet designed for a cistern will not flush properly on one.
  • Match the series to your other fittings. The five series differ in the handle and flange design. If your taps come from one series, take the valves from the same one so the bathroom reads as a set.
  • Plan the wall depth. The body is set into the wall before tiling, so the finished tile face has to land within the valve's adjustment range. This is a decision for the plumbing stage.

Installation and servicing

Concealed valves are fitted before tiling, which is what makes them worth getting right the first time. The body is set into the chase, the line pressure-tested, and the wall closed over it, leaving only the spindle projecting. The wall flange and handle go on after tiling. What matters afterwards is access: the whole serviceable part - the cartridge or spindle assembly - has to come out through the front, without breaking tile. Check that the model you choose allows this before it is built in. In a hard water area the spindle can stiffen over years of use; operating every valve in the house occasionally, including ones you never touch, keeps them free.

Common questions

What is the difference between a concealed stop valve and a flush valve? A stop valve isolates or controls a water line. A flush valve delivers a flush to a toilet directly from the supply, replacing a cistern.

Which size do I need? 15 mm for a basin or single outlet, 20 mm for a shower or heavier line, 25 mm for a toilet flush valve. Confirm the pipe size on site before ordering.

Can a concealed valve be serviced after tiling? Yes, on a properly installed valve. The cartridge and spindle come out from the front once the handle and flange are removed - the body stays in the wall.