Aluminium Round Downpipe - Spigot Extender

Deep fascia boards cause a headache that every roofer and installer across Essex and the South East knows well. The gutter outlet drops through the soffit, but the spigot does not extend far enough below the fascia for the first downpipe length or offset bend to connect cleanly. You end up with a gap, a bodged joint, or a pipe that sits at an angle because there is nothing to grip onto. On new builds around Chelmsford, Brentwood and Basildon, where deeper fascia profiles are increasingly common, this is a problem that comes up on site after site.

The spigot extender is the purpose built solution. It pushes onto the gutter outlet spigot and extends it downward, giving you a proper connection point below the fascia line. No improvising with offcuts, no forcing joints, no relying on sealant alone to hold a connection that should be mechanical. It is a small fitting that prevents a whole chain of problems further down the run.

Product Overview

The aluminium round downpipe spigot extender from Online Metal Store Ltd is a short pipe section that slides over a gutter outlet spigot to extend it past a deep fascia board. Once in place, the extended spigot provides a secure connection point for the first downpipe length, offset or bend in the run. Available in 76mm and 100mm diameters, each extender is custom fabricated at our Chelmsford, Essex workshop and powder coated in any RAL colour to match your full rainwater system.

The extender is particularly useful on properties with deep soffits, oversized fascia boards, or where the gutter outlet sits recessed behind cladding. Rather than trying to make a standard fitting work in a space it was not designed for, the extender bridges the gap cleanly and keeps the entire downpipe run properly aligned.

Key Benefits

Solves Deep Fascia Connection Problems

Where a standard gutter outlet spigot is too short to reach past the fascia, the extender adds the length needed for a proper mechanical connection. It eliminates the gap between the outlet and the first fitting, keeping joints tight and water flow uninterrupted.

Corrosion Resistant for All UK Conditions

Aluminium does not rust. Combined with a polyester powder coat finish, the extender withstands driving rain, frost cycles, coastal salt air and the prolonged damp that buildings across Essex, Kent and the Home Counties deal with year round.

Powder Coated in Any RAL Colour

Every extender is colour matched to your gutter and downpipe system before dispatch. Whether you are working with Anthracite Grey RAL 7016, Black RAL 9005 or a bespoke heritage colour, the finish is consistent across every component in the system.

Lightweight and Quick to Fit

The extender pushes onto the gutter outlet spigot without specialist tools. At a fraction of the weight of a cast iron equivalent, it is easy to handle when working at height on a ladder or scaffolding.

UK Manufactured with Fast Turnaround

Every extender is fabricated at our workshop in Chelmsford, Essex. Because we manufacture to order, quality is controlled from start to finish and lead times are kept short. Most orders leave within a few working days.

Technical Specifications

Material: Aluminium

Type: Round downpipe spigot extender

Available Sizes: 76mm diameter, 100mm diameter

Finish: Polyester powder coated in any RAL colour

Manufactured: Chelmsford, Essex, United Kingdom

Custom Fabricated: Yes, made to selected size and finish

Returns: Non-returnable unless faulty (custom fabricated item)

Price: From £86.25 ex. VAT (£103.50 inc. VAT)

Choosing the Right Size

The extender diameter must match both the gutter outlet and the downpipe system it connects to. There are two options:

• 76mm: Fits 76mm round gutter outlets and connects to the 76mm round downpipe system. This is the standard size for most domestic properties, single storey extensions and smaller commercial buildings.

• 100mm: Fits 100mm round gutter outlets and connects to the 100mm round downpipe system. Used on larger roof areas, commercial units, schools and buildings with higher rainfall volume.

If you are unsure which size you need, check the diameter of your gutter outlet or your existing downpipe. The outlet diameter determines the full system size.

How to Fit a Downpipe Spigot Extender

Start by confirming that the gutter outlet spigot is not long enough to clear the fascia board on its own. If the spigot ends above or behind the fascia line and there is not enough exposed length for a downpipe or fitting to connect, a spigot extender is needed.

Slide the extender over the outlet spigot until it sits firmly. Apply a bead of colour coded sealant around the joint for a watertight, colour matched seal. The extended spigot should now project below the fascia line, giving you a clean connection point for the first downpipe length or adjustable offset.

Secure the first pipe section with a standard pipe clip or adjustable pipe clip directly below the extender to take the weight of the downpipe run and keep everything aligned against the wall.

Where Downpipe Spigot Extenders Are Used

New Builds with Deep Fascia Profiles

Modern housing developments across Chelmsford, Colchester, Braintree and the wider South East increasingly use deep fascia boards for a contemporary roofline appearance. These deeper profiles often leave the standard gutter outlet spigot too short to connect to the downpipe below. The extender bridges the gap without compromising the system or the look of the installation.

Domestic Extensions and Refurbishments

When a homeowner replaces plastic guttering with aluminium on an existing property, the fascia depth may not match the new system perfectly. The extender provides the flexibility to make the transition work cleanly, especially on properties where the soffit and fascia have been upgraded to deeper aluminium profiles at the same time.

Commercial and Industrial Installations

On commercial buildings, warehouses and retail units, the fascia and cladding detail is often deeper than on domestic properties. The 100mm spigot extender pairs with the 100mm round downpipe system to handle larger roof areas and higher flow rates while keeping the outlet to pipe connection tight and secure.

Listed Buildings and Conservation Areas

Period properties with decorative cornicing or deep original fascia boards sometimes need the extra reach that a spigot extender provides. Powder coated in a heritage RAL colour, the extender blends into the roofline without visible bodges or misaligned joints that conservation officers would flag.

Frequently Asked Questions

What is a downpipe spigot extender used for?

A spigot extender is a short aluminium pipe section that slides over a gutter outlet spigot to extend it past a deep fascia board. It provides a longer connection point below the fascia so that the first downpipe length, offset or bend can connect properly. Without it, you are left with a gap or a weak joint that relies on sealant alone.

Do I need a spigot extender for a deep fascia board?

If the gutter outlet spigot does not project far enough below the fascia for the downpipe or first fitting to connect mechanically, then yes. This is common on modern new builds with deep fascia profiles, on properties where the fascia has been upgraded, or on any building where the soffit depth is greater than the standard outlet spigot length.

What is the difference between a spigot extender and a downpipe joiner?

A downpipe joiner connects two lengths of downpipe together within the run. A spigot extender sits at the very top of the system, extending the gutter outlet spigot itself. They solve different problems at different points in the pipe run. If you need to join two pipe lengths, use a joiner. If you need to extend the outlet past the fascia, use a spigot extender.

What size spigot extender do I need?

Match the extender to your gutter outlet diameter. This product is available in 76mm and 100mm. The 76mm is the standard for most domestic and smaller commercial installations. The 100mm is for larger roof areas and higher volume systems. Check the outlet size on your gutter before ordering.

Can I get the extender colour matched to my guttering?

Yes. Every extender is powder coated in any RAL colour before dispatch. Order it in the same RAL code as your gutter, downpipe and fittings for a fully colour matched system from outlet to ground.

Spigot Extender vs Improvised Solutions

Purpose Built Spigot Extender

A factory fabricated extender provides a consistent diameter, a proper interference fit on the outlet spigot, and a powder coated finish that matches the rest of the system. It is designed specifically for this job and gives a reliable, repeatable connection every time.

Cut Down Pipe Offcut

Some installers cut a short section of downpipe and force it over the outlet spigot as a makeshift extender. The fit is rarely tight enough, the cut end is unfinished, and the connection depends entirely on sealant. Over time, thermal movement and wind loading can work the joint loose, leading to leaks.

Plastic Adaptor

Plastic adaptors are available from some suppliers, but mixing plastic and aluminium in the same system creates colour mismatch, different expansion rates and a visible join. For a clean, long lasting connection that matches the rest of the rainwater system, an aluminium spigot extender is the right choice. Browse the full round downpipe collection to see all the fittings available.

Part of a Complete Round Downpipe System

The spigot extender sits at the very top of the downpipe run, connecting the gutter outlet to everything below. Ordering every component from a single supplier means consistent colour, consistent profile and no compatibility problems on site. The complete round downpipe range includes:

• Round Downpipe 3m Length – the main pipe run

• Adjustable Pipe Clip – for walls with uneven surfaces

• Standard Pipe Clip – fixed wall bracket

• Internal Joiner – connects two pipe lengths

• Bend – changes pipe direction

• Shoe – ground level discharge fitting

• Adjustable Offset – bridges the gap between outlet and wall

• Branch – merges two pipe runs into one

• Access Panel – inspection and cleaning access

For the gutter side of the system, see the full half round gutter collection including gutter 3m lengths, gutter round outlets, rafter brackets and union joiners.

Standards and Compliance

Aluminium rainwater downpipe fittings fall under BS EN 612 which covers eaves gutters and rainwater downpipes. The powder coat finish is applied in line with BS EN 12206-1 for powder organic coatings on aluminium. On NHBC registered new build projects, the rainwater system should meet the requirements of Chapter 7.1 (drainage) and Chapter 7.2 (roofing). Getting this right protects the warranty, the building and the people inside it.