Blocked drains are probably one of the most common problems in virtually any household. Whether it's a sink, basin or toilet, drains get blocked every day and cause a lot of headaches. Pouring bleach down the sink works to a certain extent, but after a few years something should be done to unblock it. And when you're in charge of a public building just like a school or then the drains are probably have to much more than just bleach.
The best piece of advice when coping with blocked drains is: don't try and unblock it yourself. Drainage services companies often discover that if they are called out, they must deal with a much worse problem than it the customer hadn't tampered with the drain themselves. Rather than just coping with the blocked drain, they suddenly end up met with a blocked and damaged drain, creating much more work. This is not only frustrating for the drain clearance company, but ends up costing the client much more.
https://www.tcmdraincare.co.uk/ can find two principle methods used by drain clearance companies to clear blocked drains. The first is manual rodding. Manual rodding is virtually what you believe that it is: using a long metal rod to manually clear any debris blocking the drain. It really is useful where there is not much space, but amateur attempts at achieving this are one of the primary factors behind drain damage. It may sound like a spectacularly simple methodology, nonetheless it will be a lot more involved than one might assume.
The second, far more exciting technique is that of high pressure jetting. Again, the moniker given the technique makes a conclusion almost redundant. However, it is worth noting that high pressure water jetting is so effective that it is also used for a great many other applications, such as for example cleaning gum of pavements and car parks. When there is enough space to properly utilise it, high pressure jetting is the most effective way of clearing blocked drains, as it also cleans residue from the side of the drain which could otherwise eventually build up into a blockage.
As such, high pressure jetting is a technique that is sometimes used pre-emptively to prevent blockages, rather than looking forward to the drain to obtain blocked at all. This is particularly useful for large public buildings where a blocked drain could easily spell disaster and lost working time.
Blocked drains can be an enormous headache. The great thing you can do in order to avoid further headaches in the foreseeable future, is call a specialist.