Blocked drains are probably one of the most common problems in any household. Be it 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 degree, 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 dealing with blocked drains is: don't try to unblock it yourself. Drainage services companies often find that when they are called out, they need to cope with a much worse problem than it the customer hadn't tampered with the drain themselves. Instead of just coping with the blocked drain, they suddenly find themselves confronted with a blocked and damaged drain, creating a lot more work. This is simply not only frustrating for the drain clearance company, but ends up costing the client a lot more.
Learn more can find two principle methods used by drain clearance companies to clear blocked drains. The first is manual rodding. Manual rodding is just about what you think it is: utilizing a long metal rod to manually clear any debris blocking the drain. It really is useful where there isn't much space, but amateur attempts at doing this are one of the primary causes of drain damage. It may sound like a spectacularly simple methodology, but it will be a lot more involved than one might assume.
The second, far more exciting technique is that of ruthless 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 number of other applications, such as cleaning gum of pavements and car parks. When there is enough room to properly utilise it, ruthless jetting is the best approach of clearing blocked drains, as it also cleans residue from the side of the drain that could otherwise eventually build up into a blockage.
As such, high pressure jetting is really a technique that's sometimes used pre-emptively to avoid blockages, rather than looking forward to the drain to obtain blocked at all. This is particularly ideal for large public buildings in which a blocked drain could easily spell disaster and lost working time.
Blocked drains is definitely an enormous headache. The best thing you can do to avoid further headaches in the foreseeable future, is call a specialist.