Threshold Drainage System Coupling Adaptors

These coupling adaptors connect the Alusthetic threshold drainage system to underground pipework. You use them to create a direct link between the channel outlets and standard drainage sizes.

The range includes elbow and reducer fittings for the 50mm and 80mm Alusthetic outlets, plus the Polypipe UG621 reducer for connecting 160mm to 110mm pipe where larger systems step down to standard diameters.

Key Adaptors

• 50mm Elbow: This adaptor is used with the Alusthetic End Cap (With 50mm Outlet) for the side of the threshold system, allowing for directional changes in your drainage system.
• 50-110mm Adaptor: This reducer coupling is used with the Alusthetic End Cap (With 50mm Outlet) for the side of the threshold system, enabling the connection of pipes of different diameters.
• 80-110mm Adaptor: This adaptor is used with the Alusthetic Bottom Connector (With 80mm Outlet) for the bottom of the threshold system, facilitating the connection to larger diameter underground pipes.
• 160mm to 110mm Reducer: Reduces 160mm underground drainage pipe down to 110mm. Useful when an Alusthetic outlet is being tied into an existing larger-diameter system.

Practical Use

These adaptors are used to:

• Step Alusthetic outlet sizes up to standard pipe diameters.
• Switch direction using the 50mm elbow.
• Connect 50mm and 80mm channels into 110mm pipework, which is the most common underground drainage size.
• Reduce oversized pipe runs with the 160mm to 110mm Polypipe UG621 when systems vary across a property boundary or manhole.

FAQs

Can I connect these adaptors directly to the Alusthetic drain body?

No. You connect them to the Alusthetic end caps (50mm) or bottom connector (80mm).

Is the Polypipe UG621 compatible with Alusthetic?

Yes. It connects on the pipework side when you need to reduce 160mm pipe down to 110mm before joining to the Alusthetic outlet via the 50mm or 80mm adaptor path.

Are these fittings suitable for foul or surface water?

They are standard PVC drainage fittings and can be used for either application as long as they are installed within the correct system.

Which adaptor should I use for a bottom outlet?

Use the 80mm to 110mm adaptor for the Alusthetic bottom connector.

Can I use these if my pipework is older clay pipe?

Yes. You will need the correct clay-to-plastic coupling on the clay side.