Downpipes
Downpipes carry water from the gutter to a drain or soakaway at the base of the wall. Plastic downpipe comes in 68mm round and 66mm square to match the guttering profile, in 2.5m, 4m and 5.5m lengths, with bends, offsets and shoes to complete the run, held to the wall by gutter clips.
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Aquaflow 68mm Cast Iron Effect Round Downpipe Offset Bend 92.5°
£21.64Inc. VAT
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Aquaflow 68mm Square Cast Iron Effect Downpipe Offset Bend 92.5°
£23.81Inc. VAT
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Aquaflow Cast Iron Effect 66mm Square/Round 68mm Downpipe Adaptor
£5.00Inc. VAT
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Choosing Downpipes
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.
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.
Look at the front edge from the ground. A plain curve is half round, a flat face with a square shoulder is square, and a moulded, shaped front is ogee. Then measure across the top of the gutter: 112mm and 114mm are the common domestic sizes, with 125mm, 130mm and 170mm on deeper and commercial systems.
Not reliably. Profiles that look alike often differ by a few millimetres across the seal, so a union from one system may not grip, or may leak, on another. Match the profile and size already on the building. If a run is being replaced piecemeal, bring an offcut or a photo of the union before ordering.
Twice a year is the usual advice — once after leaf fall and once in spring — and more often under trees. Standing water, plant growth in the gutter, or a stain running down the wall below a joint all mean it needs attention sooner. A gutter brush on a pole clears most domestic runs from the ground.