If you are keen to keep your plants and garden watered, then capturing rainwater in a water butt is a must and these gutter conversion kits can help. Attaching to the end of greenhouse guttering, they channel the run-off water through the downpipe into the desired receptor. This set of greenhouse gutter downpipes has a wider 50mm mouth, perfect for those greenhouses with wider guttering. To create a firm seal, we recommend a bead of mastic or waterproof sealant is applied to the downpipe mouth before siting into the gutter. Siting a water butt by the greenhouse is a popular choice as it keeps water on hand to help nurture thirsty young growth. Coming in a set of 2, they are purpose made to fit greenhouses with slightly wider guttering and slot easily and neatly into the gutter end to channel rainwater into a water butt or other container. Grey in colour, with a 25mm diameter downpipe, they fit gutters 50mm wide.