Around 75% of blockages involve disposable items and this costs british householders millions of pounds annually in plumbing bills. Feel free to contact us through our contact page. If this is your first repair, your boiler may not need replacing just yet compare the cost of the repair to the cost of replacing a repair averages between. But how do you know if your existing boiler needs to be replaced, or if it just requires a service? here are the signs that you should be investing.