Threshold Drainage System Coupling Adaptors

Threshold Drainage System Coupling Adaptors are practical drainage fittings used to connect threshold channel drain outlets into standard underground pipework. They are commonly used with Alusthetic threshold drainage systems where the outlet size needs adapting, the pipe run needs to change direction, or the system must connect into existing drainage already on site.

These fittings help create a cleaner and more reliable route from the threshold drain to the main drainage network. They are useful during new patio installations, replacement thresholds, driveway drainage upgrades and retrofit projects where existing pipe sizes do not match the channel outlet directly.

The 50mm Elbow is used with 50mm end cap outlets where a change in direction is required. This is useful in tight areas near walls, steps or door thresholds.

The 50-110mm Adaptor steps a 50mm threshold drain outlet up to standard 110mm underground drainage pipe, making it a common choice for domestic installations.

The 80-110mm Adaptor is typically used with bottom outlet connectors where a direct vertical drop into 110mm pipework is required.

The 110-160mm Adaptor is useful where larger or older drainage systems need adapting between 110mm and 160mm pipe sizes.

Manufactured for below-ground drainage use, these fittings are suited to surface water and foul water applications when specified correctly. Always confirm pipe sizes before ordering and use compatible seals or solvent weld methods as required by the fitting type.

Connects threshold drains to underground pipework

Helps adapt 50mm, 80mm, 110mm and 160mm pipe sizes

Useful for new installs and retrofit drainage work

50mm elbow allows direction changes in tight areas

Popular for linking threshold drains to 110mm pipe

Suitable for surface water and foul drainage systems

Helps create cleaner outlet connections

Compatible with Alusthetic threshold drain layouts

Manufactured from durable plastic drainage-grade materials suitable for underground pipework connections and external drainage environments.

Product type: Threshold drainage coupling adaptors
Use: Connecting threshold drains to underground drainage pipework
Application: Surface water and foul drainage systems

Adapter options:
50mm Elbow
50-110mm Adaptor
80-110mm Adaptor
110-160mm Adaptor

Compatible systems: Threshold drainage outlets and standard underground pipework
Installation: Push-fit or compatible connection method depending on fitting type