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OSMA RoundLine Guttering System

OSMA RoundLine offers you a classic half-round profile ideal for domestic buildings.

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Choice of colours

Size and colour

RoundLine is a 112mm (4½") half-round domestic gutter system with circular 68mm downpipe available in black, white, brown and grey colour options.

Osma RoundLine design features

Design features

  1. For outstanding flow performance RoundLine features an hydrodynamic outlet to handle more rainwater than similarly sizes competitive systems.
  2. Using specialist seal technology our wide, retained seals provide a secure, watertight fixture with the flexibility to allow for thermal expansion.
  3. For an aesthetic pleasing finish, Osma fittings have been engineered with concealed sockets to hide roughly cut downpipe ends.
  4. Expansion line and stopper for a secure and reliable installation.

Easy gutter installation with FlexiClip

Ease of installation

RoundLine is fitted with a ‘Flexiclip’ seal jointing mechanism, making it easy to connect gutter to fittings. Because the clip is flexed, rather than the whole component, this ensures a positive, permanently watertight joint.

How to Videos

Visit the Osma Rainwater playlist on YouTube to play our range of videos covering subjects such as installing a guttering system, allowing for expansion, maintenance and an overview of StormLine, our premier high capacity ogee domestic rainwater system.

Project support from Wavin

What’s next?

You can keep up to date with new product ranges, systems and projects by signing up to our Newsletter.
And why not take this opportunity to have a look through our downloadable product guides, certifications and other literature.

Our design support team can assist with your project

  • Technical advisory service Technical advisory service Please note, this number will incur a service charge
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