Everyone has a different idea what exactly the initials WC mean. It of course is short for Water Closet so many people think it is referring to the actual room where the loo is situated. When it is really alluding to the actual pan and cylinder on which we all sit at one time or another. Harefield Plumbers know all about WC’s. The suite itself has undergone many changes in deign in recent years. The water regulations say there is a limit on the volume of water that can flush down the pan. A newly fitted toilet pan has a maximum of 6ltrs, whereas not too many years ago it was 9ltrs. The majority of toilets that are fitted todays are known as ‘Wash-Down’ types which means that they use the discharging water pressure to wash the waste from the pan away into the waste system. Sometimes, a siphonic WC can be found. Fitted in homes during the 1970’s these WC’s are becoming somewhat of a fossil as people update their houses. The siphonic type of pan had one advantage over the wash-down type in that it had the additional siphonic action which helped the removal of the waste from the pan. A Harefield Plumber is a skilled tradesman It worked by lowering pressure of the air from the pocket of air that is trapped between both traps. This was achieved by allowing the water that was flushing to pass over a pressure-reducing fitting which had the effect of creating a negative pressure which would suck out the air that sat between the two traps of water. The action of the vacuum resulted in the waste located in the pan being sucked out at some speed by something called action siphonic. Although this type of system was very good it was actually quite expensive to install, and is not really installed any longer.