Primo™
Products

Primo™
Siphonic Roof Outlet

Primo™ Siphonic Roof Outlet
Product Overview

The flagship
siphonic outlet

The Primo™ is Fast Flow's flagship siphonic roof drainage outlet — designed for flat and green roofs where maximum flow capacity and reliability are required. Available in cast iron, stainless steel and UPVC, the Primo™ is certified under the Singapore Green Building Product (SGBP) 3-Tick scheme and TÜV SÜD.

System
Siphonic
Application
Flat & Green Roofs
Certifications
SGBP 3-Tick, TÜV SÜD
Materials
Cast Iron, SS, UPVC
Key Features
Feature 01
High Flow Capacity
The Primo™ is designed to maximise flow entry while maintaining the anti-air baffle performance required for reliable siphonic operation — delivering the highest flow rates of any outlet in the Fast Flow range.
Feature 02
Material Flexibility
Available in cast iron for acoustic-sensitive applications, stainless steel for exposed or corrosive environments, and UPVC for cost-effective large-roof installations.
Feature 03
Green Roof Compatible
The Primo™ incorporates a sump and filter design that is compatible with inverted roof and green roof assemblies — maintaining outlet performance while accommodating insulation and substrate layers.
Feature 04
Easy Installation
Designed for straightforward installation with adjustable height settings and full waterproofing clamp arrangement — compatible with all major flat roof waterproofing systems.
Feature 05
Low Maintenance
The Primo™ filter dome is removable for routine maintenance without disrupting the waterproofing layer — ensuring the outlet remains clear and fully functional throughout the building's life.
Feature 06
Certified Performance
SGBP 3-Tick and TÜV SÜD certified — providing independent verification of drainage performance and environmental credentials for green building rating system submissions.
Specify Primo™ for
your next project
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