About this deal
Bracket opening clamps between 10mm (approx 1/3") and 76mm (approx 3") - roof edges <10mm thick will need a bit of packing material e. Slide the flexible downpipe on, nip up the clamp and start saving rainwater into the water butt of your choosing! I turned up with a neat plan for my sewage system, with appropriate measurements etc at my local place and at another with a requirement for the plastic trays used for underfloor heating. Please note that our guttering kits are long items - they are sent in 6ft long boxes and therefore specific courier services are required. Hard surfaces on some plastic and metal sheds may benefit from anti-slip material to help the brackets grip.
Coolant hoses for commercial vehicles sound a possibility, though no doubt expensive if they operate under pressure. A full VAT receipt will be provided with all goods inside the box or in a document wallet on the outside of the packaging. Caravan sink pipe looked promising, but it's on the small side - I'll have to lash up some reducer arrangement. As far as I previously discovered, fish-pond type hose comes in various diameters but no where near 68mm. At both I was treated with the sharp intake of breath, and at the first a screaming of abuse that (a) they didn't want to deal with me and (b) the drawing was all wrong because I hadn't shown every single length of tube with separate measurements for each length.
When I pointed out that a run of 60 metres just meant that I wanted 10x6 metre lengths of tube I got more intake of breath and more insults. Leave a 10mm gap between the end of the pipe and the bottom of the pipe socket to allow for expansion.
All I want to do is fix some flexible hose to the 68mm diameter gutter down-pipe exit with a hose clip and manoeuvre the hose round bends and squeeze through gaps into the water butt.If you think that the UK is bad, try living in a country where it is a crime to criticise the unions, where every trade has a guild dedicated to preserving the status of "professionals" as untouchables whose word must be trusted implicitly, and where the entire social structure is set up to exclude outsiders.