Downpipe Branches
Downpipe branches let two runs join into one before they reach the drain, which saves a second gully on an extension or a garage roof. Y branches and 112.5 degree branches cover 65mm and 66mm square and 68mm round, in white and cast iron effect. Where several runs combine, use a gutter hopper.
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22 UK Branches
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In Stock
Choosing Downpipe Branches
Frequently Asked Questions
68mm round is the standard partner for half round and deep flow guttering, and 66mm square goes with square and ogee profiles. Cast iron effect systems use a narrower 65mm square to keep the period proportions. The pipe has to match the outlet on the gutter, so settle the gutter profile first.
At the low end of the fall, above a gully or a suitable discharge point, and as close as practical to a downpipe route that can run straight down the wall. On a long elevation it is usually better to fall to an outlet at each end than to run the whole length to one, which needs more fall and a deeper drop.
Fix a clip within 150mm of every socket joint, then at roughly 1.8m to 2m centres down the run, with an extra clip either side of an offset bend. On a narrow passage or boundary wall, flush-fitting clips let the pipe sit tight against the brickwork.
Only where the property is on a combined sewer, which is common on older housing but not on newer estates. Where the system is separate, connecting a rainwater downpipe into a foul drain is not permitted and overloads the sewer in heavy rain. Check which system you are on before you connect anything new.