Not in all cases. If you flush a full cistern full of water and there’s a blockage present, the toilet could easily overflow. What you’re doing here is taking the risk that the weight of water in the bowl will be enough to clear the blockage. Unfortunately, this won’t work if the clog is significant.
To many people, the very idea of clearing blocked toilets is unpleasant. Even if you have a plunger and rubber gloves at hand, you’ll only have luck with DIY methods if the blockage is within the trap rather than further down the pipework or in the soil stack. Frequently, this is not the case, but our specialist engineers can clear blockages from these sites.
If you use an at-home method such as washing up liquid to lubricate the system and loosen the blockage, take care when you flush the toilet to check if the water drains away as normal – be prepared in case it doesn’t.