Households urged to pour vinegar down drains after rainfallSome areas of the UK are facing heavy downpours, and plumbing experts are urging households to pour vinegar down their drains to help keep them clear of blockagesView 2 Images Pour vinegar down drains after rainfall (Image: Kinga Krzeminska via Getty Images)Parts of the UK are once again facing heatwave conditions this week, while other regions are being battered by torrential downpours. When heavy rainfall meets already-blocked drains, the pipes simply cannot handle the volume of water flowing through them. With this in mind, households are being encouraged to pour vinegar down their drains on Monday to help clear any blockages left by the weekend's rainfall. A simple combination of vinegar and bicarbonate of soda can keep your drains flowing freely, without the need for constant unblocking. "Warm four parts vinegar and pour down on top of the baking soda and salt.