Square Downpipe

What the Square Downpipe Range Includes

This subcategory contains 15 products for forming and finishing an aluminium square downpipe run. The main 3m aluminium square downpipe is available in three confirmed dimensions:

• 76mm × 76mm
• 100mm × 76mm
• 100mm × 100mm

The wider range includes access panels, adjustable offsets, pipe clips, bends, branches, internal joiners, shoes, spigot extenders and a rectangular hopper head with a box outlet. Matching metal and timber fasteners, coloured sealant, spray cans and touch-up paint are also available.

Select all fittings in the same size as the main pipe. Similar-looking square downpipe products from another system should not be assumed to connect correctly.

Where Aluminium Square Downpipes Are Used

A square downpipe carries collected rainwater vertically from a gutter outlet or hopper towards a drain, water collection point or other specified discharge detail. Its straight-sided profile often suits contemporary houses, commercial buildings, apartment developments and projects using box-style roofline components.

Aluminium is lightweight and corrosion-resistant, making it suitable for exposed exterior applications. The products are offered in Mill Finish and a broad selection of powder-coated RAL colours, allowing black, white, grey, brown and other colour requirements to be considered.

How the Components Form a Complete Downpipe Run

The 3m lengths create the main vertical pipe run. An aluminium square downpipe internal joiner connects adjoining lengths, while square downpipe clips secure the pipe against the wall or supporting background.

Bends and an adjustable square downpipe offset can move the pipe between the gutter outlet and the wall line or around soffits and other projections. A branch allows an additional rainwater route to enter the main pipe, while an access panel provides a point for inspection and cleaning.

At the bottom of the run, an aluminium square downpipe shoe can direct discharged water towards the intended drainage point. A spigot extender provides an additional connection component where required by the layout.

The rectangular hopper head with box outlet can collect rainwater before it enters the square downpipe. The system can also be coordinated with a suitable outlet from the Aluminium Box Gutter range.

Product Selection Help

Before ordering a square aluminium downpipe system, check:

• The required pipe size.
• The total vertical drop.
• The number of 3m lengths required.
• The distance between the gutter outlet and wall.
• Any bends or offsets needed around the roofline.
• The number of internal joiners and pipe clips.
• Whether a branch or access panel is required.
• The hopper or gutter outlet dimensions.
• The shoe or final drainage connection.
• Whether the fixings will enter metal or timber.
• The required Mill Finish or RAL colour.
• Any sealant, fasteners or touch-up products needed.

For replacement work, measure both sides of the existing pipe. A rectangular 100mm × 76mm product must not be confused with a 100mm × 100mm square pipe.

Do not assume that a 65mm square downpipe, plastic connector or generic square-to-round adaptor will fit this system. The current confirmed Metal Profiles Ltd options are 76mm × 76mm, 100mm × 76mm and 100mm × 100mm.

Common Ordering Mistakes

A frequent mistake is choosing a pipe before checking the gutter or hopper outlet. The outlet, pipe and adjoining square downpipe fittings must use compatible dimensions.

Other mistakes include:

• Mixing 76mm and 100mm fittings.
• Forgetting the extra length required for an offset.
• Ordering too few pipe clips or internal joiners.
• Confusing a bend with a branch.
• Failing to plan the bottom discharge detail.
• Selecting a colour without checking all matching accessories.
• Assuming square and round systems can connect without a purpose-made transition.

The drainage capacity, outlet arrangement, clip spacing and final discharge position should be confirmed by the project designer, roofing contractor or installer.

Standard Components or Bespoke Fabrication?

Standard products should suit many straightforward installations using the three listed pipe sizes and matching fittings.

Bespoke fabrication may be needed where the project has:

• A non-standard pipe size.
• An unusual offset or bend.
• A customised branch arrangement.
• An awkward hopper connection.
• A special transition between gutter and downpipe.
• A detail that cannot be formed from standard components.

Provide the pipe dimensions, total drop, outlet type, offset measurements, required fittings, fixing substrate, colour and any available drawings when requesting a project estimate.

Metal Profiles Ltd can review the requirement as part of the wider Aluminium Rainwater Goods range for projects in Chelmsford, Essex, London and elsewhere in the UK.

Frequently Asked Questions

What is a square downpipe used for?

A square downpipe carries rainwater from a compatible gutter outlet or hopper down the exterior of a building towards the specified drainage or discharge point.

What square downpipe sizes are available?

The current 3m aluminium downpipe is offered in 76mm × 76mm, 100mm × 76mm and 100mm × 100mm sizes. Choose matching fittings for the selected pipe dimensions.

Is this a 65mm square downpipe system?

No. A 65mm size is not currently shown as a standard option in this category. Do not assume that a 65mm fitting or connector from another system will be compatible.

Which square downpipe brackets or clips do I need?

Choose pipe clips that match the selected downpipe size. The required quantity and spacing will depend on the building background, pipe route and project specification, so these details should be confirmed by the installer.

Can a square downpipe connect to a round pipe?

A square-to-round transition requires a compatible purpose-made adaptor or fabricated connection. A standard adaptor is not currently shown in this category, so send the two connection dimensions for review.

What colours are available?

Mill Finish and a wide range of RAL colour options are shown on the product pages. Black, white, grey and brown shades can be selected from the relevant RAL options, subject to confirmation for each component.

Are bespoke square downpipe components available?

Bespoke solutions can be considered where the standard pipe sizes, bends, offsets or connections do not meet the project detail. Provide dimensions and drawings for review.

How do I request an estimate?

Use the Metal Profiles Ltd estimate request form and include the pipe size, total length, outlet connection, offsets, fittings, fixing surface, finish and relevant drawings.