Unblocking the drains is necessary when problems such as the following arise:
water drains very slowly from the sink, bath or shower;
the toilet is slow to flush or overflows;
unpleasant odours are coming from the drains;
noises can be heard in the pipes;
water is backing up into the home;
outdoor drains are becoming blocked or overflowing.
Ignoring these signs can lead to complete blockages and more costly problems.