Aluminium Box Downpipe – Internal Joiner

The Aluminium Box Downpipe Internal Joiner is engineered to connect two sections of downpipe with a hidden, watertight joint. Made in the UK from premium architectural-grade aluminium, it ensures strength, seamless appearance and long-lasting protection for any rainwater downpipe system.

Perfect for modern aluminium gutters and downpipes, this fitting maintains clean lines and supports efficient water flow across both commercial and residential projects.

Key Features

• High-quality aluminium construction – durable and corrosion resistant

• Internal fit – creates a neat, flush finish with no visible connector

• Compatible with all aluminium box downpipes

• Ensures watertight seal and smooth water drainage

• Can be powder coated in any RAL colour to match guttering

• Low-maintenance and designed for UK weather conditions

• Manufactured in Britain for consistent quality and fast delivery

Why Choose Aluminium Downpipe Fittings

Aluminium is the preferred material for modern gutters and downpipes thanks to its strength, rust resistance and premium finish. The internal joiner prevents leaks, reduces visual clutter and keeps your rainwater system performing at its best.

When used with aluminium downpipes, gutters and hoppers, it provides a complete, visually unified solution for contemporary buildings.

What is a downpipe joiner
It connects two downpipe sections securely, ensuring a continuous flow of water.

Is this suitable for square or box downpipes
Yes, it is made for box-profile aluminium downpipes.

Can I powder coat it
Yes, choose any RAL colour including anthracite grey or black.

How to install an internal downpipe joiner
Slide each downpipe section over the joiner and seal for a tight, watertight fit.

Aluminium box downpipe internal joiner. UK made, corrosion resistant and powder coated. Ideal for seamless connections in aluminium rainwater downpipe systems.