Blocked drains are perhaps 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 large amount of headaches. Pouring bleach down the sink works to a certain extent, but after a few years something has to be done to unblock it. And when you're responsible for 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 to unblock it yourself. Drainage services companies often discover that when they are called out, they must deal with a much worse problem than it the client hadn't tampered with the drain themselves. Instead of just dealing with the blocked drain, they suddenly find themselves met with a blocked and damaged drain, creating a lot more work. This is not only frustrating for the drain clearance company, but ends up costing the client a lot more.
There are two principle methods utilized 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 isn't much space, but amateur attempts at achieving this are one of the biggest causes of drain damage. It may sound like a spectacularly simple methodology, nonetheless it is 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 an explanation almost redundant. However, it is worth noting that high pressure water jetting is indeed 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 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, ruthless jetting is a technique that's sometimes used pre-emptively to prevent blockages, rather than waiting for the drain to obtain blocked at all. Get more info 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 best thing you can do in order to avoid further headaches down the road, is call a professional.