Many beautiful bathrooms we have the privilege of working in, still boast a toilet with a high-level cistern mounted on the wall. These high-tank style toilets reigned bathrooms across the UK during the Victorian era and are still sought after by owners of period properties for their timeless appeal and subtle nod to the era in which their property originated. We are pretty sure that even The Queen herself still boasts high level toilets within many of her 78 bathrooms at Buckingham Palace, after all, the palace famously became the principal royal residence on the accession of Queen Victoria, and very little has been done to update the plumbing infrastructure at the palace since.
This article answers takes a closer look at high-level toilet cisterns and how they work.
How does a high-level cistern work?
The cistern is the small tank that appears behind you when seated on the toilet seat or above you if you have a high-level cistern type toilet. This compact tank stores cold water locally to the toilet. When we flush, the stored water gushes through the toilet pan, rinsing it clean and pushing the waste through the U-bend and on its way to the sewer. Once emptied, the toilet cistern will then fill up automatically, ready for the next time the flush chain is pulled.
To release the cold water stored in the toilet cistern, a flush control needs to be activated. This can be a lever, a push button or even a sensor (meaning you don’t have to physically touch the controls in order to operate it). Due to their height and traditional style, high level toilets typically boast long pull chains for flush control.
Let’s take a detailed look at exactly what happens inside the cistern and toilet when you operate the flush control…
- Pull the chain to flush the toilet which will operate a lever (dotted line) inside the cistern.
- The lever will open a valve (orange) that allows the cistern to empty into the toilet pan through a mechanism (siphon).
- Water will flow from the cistern down the flush pipe and through holes in the toilet rim to wash the bowl as well as flush waste away.
- The amount and force of the water flushes the toilet waste around the S-bend. This produces a siphon effect that draws out most of the liquid and the waste contents within it until the bowl is clean. A little bit of water remains in the bowl to improve hygiene.
- The waste contents from the toilet are then flushed down the main drain.
- As the cistern empties, the plastic float (in red) falls downwards and tilting a lever.
- The tilting lever opens the ball valve (orange) at the base of the cistern, to allow pressurised water to flow in to refill the cistern. As it refills the float returns to the top again back to its correct (pre-flush) position. At this point, the ball valve closes, and the water supply is unable to enter the cistern.
The toilet is now ready for the next user!
Why have a high-level toilet?
Modern toilets no longer rely on gravity to flush effectively, so why are the still so popular among modern homeowners, I hear you ask? Well, it all comes down to style. Traditional high cistern toilets offer a classic, timeless style that continues to remain popular in today’s bathroom designs. Owners of Victorian and Georgian homes are particularly keen to keep as many original features of their property as they can (or replicate as closely as possible where retaining them is not an option). Keeping a period home authentic helps to retain its value and more importantly, retain the charming features that these dwellers fell in love with when they bought the property in the first place. There are so many beautiful ranges of high-level toilets available on the market today that you will be spoilt for choice.