Overview

The Holman Storm PVC Downpipe Adaptor 100 x 80 x 90mm is the fitting that connects a rectangular downpipe to a round 90mm stormwater pipe. The rectangular end matches the profile of a standard downpipe, and the round end solvent welds to 90mm stormwater pipe, so the two parts of the drainage system join without a custom transition.

It is made from quality recycled PVC and used for stormwater and rainwater drainage. The adaptor is solvent welded into place and complies with AS/NZS 1254 for stormwater fittings.

Key Features

• Connects a rectangular downpipe to round 90mm stormwater pipe
• 100 x 80mm rectangular opening to 90mm round
• Made from quality recycled PVC
• Solvent weld connection for a watertight joint
• Simple transition without a custom fabrication
• Complies with AS/NZS 1254, AMI 70007

Specifications

• Adaptor size: 100 x 80 x 90mm
• Rectangular opening: 100 x 80mm downpipe profile
• Round connection: 90mm stormwater pipe
• Material: recycled PVC
• Jointing: solvent cement
• Standard: AS/NZS 1254, AMI 70007

Applications

• Connecting a downpipe to a below-ground stormwater line
• Transitioning a rectangular gutter outlet to round pipe
• Rainwater tank and overflow plumbing
• Above and below ground stormwater systems

What You Need to Complete the Job

Check the downpipe profile against the rectangular opening before cementing. Solvent weld the round end to the 90mm stormwater pipe, and connect the downpipe to the rectangular end as the system requires, using Bostik Pipe Cement Type N for the PVC joints. The matching 100 x 50 x 90 adaptor is a separate fitting in the range. More fittings are in the PVC Fittings range.

Frequently Asked Questions

What does 100 x 80 x 90mm mean on this adaptor?

The first two numbers are the rectangular opening, 100 x 80mm, which matches the profile of a standard rectangular downpipe. The third number is the round connection, 90mm, which solvent welds to 90mm stormwater pipe.

Can I use this adaptor with any downpipe?

It is made for a 100 x 80mm rectangular downpipe profile. Check your downpipe dimensions before ordering, because a different profile needs a different adaptor. The round end fits standard 90mm stormwater pipe.

Is this the same as the 100 x 50 x 90 adaptor?

No. The 100 x 50 x 90 adaptor has a smaller 100 x 50mm rectangular opening, while this one is 100 x 80mm. They connect different downpipe profiles to the same 90mm round pipe, so choose the one that matches your downpipe.

Is the adaptor suitable for buried connections?

Yes. The recycled PVC adaptor is made for above and below ground stormwater work, and the solvent weld joints give permanent watertight connections. Support the adaptor on even bedding in the trench so the joint is not point-loaded.