Downpipe Adaptor Square to Round

Stormwater Downpipe Adaptor – Square to Round – PVC-U

Stormwater Downpipe Adaptors are designed to connect rectangular or square downpipes to round stormwater pipes, providing a seamless transition from your roof drainage system to your stormwater drainage network. Manufactured from rigid PVC-U, these adaptors are durable, corrosion-resistant, and suitable for both domestic and commercial stormwater applications.

One end of the adaptor fits the downpipe, while the opposite end accommodates the stormwater pipe, ensuring secure and leak-free connections. These adaptors are compatible with 90mm, 100mm, and 150mm stormwater pipes, with inspection flap options available for maintenance access.

Key Features

• Durable PVC-U Construction – Rigid, corrosion- and chemical-resistant for long-lasting use.
• Square-to-Round Transition – Connects square downpipes to standard round stormwater pipes.
• Multiple Sizes – Compatible with common downpipe dimensions and stormwater pipe sizes.
• Inspection Flap Option – Some variants include an inspection flap for easy maintenance.
• Solvent Cement Jointing – SCJ system ensures strong, leak-free connections.
• Above-Ground or Underground Use – Suitable for all stormwater installations.
• UV & Temperature Resistant – Can be exposed to sunlight; long-term exposure should be limited.
• Compliance – Manufactured to AS/NZS 1254 standards for stormwater systems.

Specifications

• Material: PVC-U (unplasticised PVC)
• Pipe Connection: Square downpipe x round stormwater pipe
• Installation: Solvent Cement Joint (allow 24-hour setting)
• Sizes Available: Various downpipe sizes from 100 x 50mm, 100 x 75mm, 100 x 100mm, 150 x 100mm, 150 x 150mm
• Applications: Domestic and commercial stormwater drainage, gutter connections, downpipe adaptation

Variants (SKU – Description)

• PSW117INS — 100 x 50mm for 90mm pipe with inspection flap
• PSW117 — 100 x 50mm for 90mm pipe
• PSW117MF — 100 x 50mm in pipe for 90mm pipe
• PSW120 — 100 x 50mm for 100mm pipe
• PSW118 — 100 x 75mm for 90mm pipe
• PSW121 — 100 x 75mm for 100mm pipe
• PSW119 — 100 x 100mm for 90mm pipe
• PSW122 — 100 x 100mm for 100mm pipe
• PSW124A — 150 x 100mm for 100mm pipe
• PSW124 — 150 x 100mm for 150mm pipe
• PSW125 — 150 x 150mm for 150mm pipe

Note: Pipes and fittings must be joined using solvent cement (SCJ) with a 24-hour setting period for full mechanical strength. Designed for stormwater systems only.