Overview
- Bank holiday downpours have left outside drains clogged with leaves and food residue, which plumbing experts say often bind to fat, oil and grease.
- Maintracts advises pouring boiling water mixed with generous washing-up liquid into outside drains linked to kitchen sinks, with a slow pour and repeats until clear.
- The heat softens hardened fat on pipe walls while the soap loosens it so the flow can carry it away.
- Experts warn against using detergent in drains that take only roof rainwater, with plant-based soap or vinegar and bicarbonate suggested as safer options.
- The guidance offers a low-cost DIY step to restore flow without harsh chemicals, though severe or persistent blockages still require professional help.