There will come time that the loyal WC you have used for years will ultimately fail. If this happens you will obviously not be too happy about it and might be tempted to hope that it cures itself, however we know that it wont. So, you flush the toilet and the bowl does not empty and just sits there. There is a remote chance that it will drain very slow, but nearly always come back after the next flush. Should you think that this kind of job is just too involved, you should call a professional plumbing service like Abbey Wood Plumbers who use skilled tradesmen with experience. The best way to attack this problem is with a plunger.Purchase (if you don’t already own one) a drain rod, this will have be fitted with a thread on one end. To this end you need to screw a 150mm (6 inch) rubber drain plunger cup. You can buy this at your local plumbing merchant. A skilled tradesman like a Thamesmead Plumber can fault find and fix plumbing issues. You will need to place the plunger in the bowl and cover the mess, however dank and dirty, the water is in the WC bowl.Work the plunger up and down inside the pan.Plunging can usually be quite effective. If the pan remains blocked after the plunger has been used the blockage could be further along the pipe, perhaps caused by air simply getting in through the open vent pipe at the top of the drain. This type of blockage further along the drainpipe may also affect many other appliances in your home such as sinks and baths and may put them out of action causing a much more convenience than normal. This is where the expertise of a professional plumbing service will come into its own.