Aluminium Round Downpipe – Internal Joiner

Join round downpipes securely with a hidden connector that keeps your system clean and leak-free.

The Aluminium Round Downpipe – Internal Joiner is the go-to solution for creating seamless connections between two round downpipe sections. Designed to fit inside the pipe, it provides a clean exterior finish while ensuring watertight performance. Made from durable, rust-resistant aluminium and powder-coated for long-term weather protection, this internal joiner is ideal for both new builds and repairs in residential, commercial, or industrial projects.

Please refer to the attached RAL colour chart to view available options. At checkout, enter your chosen RAL colour in the designated box.

Choose a variant:

Pipe Diameter

£18.12

excluding shipping cost

Download Colour Chart

Features + Benefits

Creates a flush, hidden joint between round downpipes
Reduces visible seams for a cleaner look
Made from strong, corrosion-resistant aluminium
Coated with external-grade polyester powder for durability
Fire-rated A2-s1,d0 to meet UK building standards
Compatible with 63mm, 76mm, and 100mm round pipes
Easy to install and maintain
100% recyclable and made in the UK

Specs & Options

Material: 1050A Grade Aluminium
Finish: Polyester powder-coated (RAL/BS colour options)
Use Case: Internal connector for joining round downpipe sections
Fire Rating: A2-s1,d0
Lead Time: 3 to 5 working days
Custom Options: Sizing available for various pipe diameters

Installation / Usage Instructions

Insert the joiner halfway into the bottom of the upper pipe. Then slide the lower pipe section over the exposed end. Use aluminium-compatible sealant around the joint for a secure, watertight seal. Secure with brackets as needed.

Want a sleek way to extend or connect round downpipes?