There are 5 types of toilets currently available in the UK.
This is the most common type of toilet in the UK. This type of toilet has the pan and cistern joined together. The advantage of this type is that the pan has a splash back built onto it where it joins the cistern
Back to Wall
This type of toilet is used mainly when having fitted furniture. As with the wall hung toilet the cistern is concealed inside the furniture but the pan is sat on the floor. Alternatively you may have the cistern concealed in a false wall depending on the look you are trying to achieve.
This type of toilet has the pan hanging on the wall and the cistern concealed in the wall behind it. You do however need to ensure that the pan is supported properly when fitted either by the use of special floor mounting brackets or the use of a frame work. A wall hung pan minimizes the impact of the WC on the design of the room.
This type of toilet was popular in the Victorian era and is associated most closely with bathrooms of that period. The pan is free standing and the cistern sits on the wall approx 1800 or 6 feet up the wall with chrome or gold flush pipe and a chain pull flush.
This type of toilet has a freestanding pan and the cistern sits approx 900mm or 36 inches up the wall with a short flush pipe in between the 2 pieces. Like the High Level, they are most commonly sold with a traditional bathroom and have a chrome or gold flush pipe.
Due to British Water Regulations Cisterns now hold 3/6 litres of water and tend to be operated by a dual flush mechanism.
Dual Flush Valve (Dump Valve)
The majority of WC’s are fitted with a dual flush valve or a dump valve as many people know it. The Dual flush valve works by a means of a push button, as you press the button it lifts a valve that instantly releases all the water down through the toilet. This makes the type of flushing mechanism very effective with low levels of water.
The Inlet Valve
The cistern fittings have an inlet valve/refill mechanism that turns the water on and off, when the push button is pressed the dump valve releases the water into the bowl and the filler float (or ball valve) falls. The Valve turns the water on and refills the cistern until the filler float (ball valve) returns to the required level.
Today’s cistern fittings also have an internal overflow which means the water flows back in to the pan if the ball valve fails, it also makes them easier to install.