ArborFlow
Compact SuDS tree pit systems.
For streetscapes needing both tree growth and stormwater compliance.
Why ArborFlow
ArborFlow is GreenBlue Urban’s engineered SuDS tree pit system for urban areas where both tree health and stormwater compliance are required. It combines uncompacted soil volume with stormwater detention, filtration and controlled outflow — delivering predictable, authority-approved performance in space-constrained sites.
- Supports healthy tree establishment.
- Captures, detains and filters runoff at source.
- Releases flows at a controlled rate to meet approval requirements.
Core design elements
- Inlets and pre-treatment – kerb inlets with integral silt/debris trap simplify maintenance.
- Sub-surface storage – high-void, load-rated RootSpace cells detain runoff beneath the pavement.
- ArborCell attenuation unit – sits below RootSpace to provide additional stormwater detention and controlled release.
- StormForm multifunctional surround – integrates silt capture, inlet, irrigation and grille into one assembly.
- Flow control and outfall – downstream chamber throttles discharge to authority limits; options for infiltration, root uptake or discharge.
- Integrated tree support – internal faces act like RootDirectors; irrigation system supports establishment.
- Surface protection – integral tree grille options for safety and design.
Benefits
- Reduces runoff velocity and peak flows.
- Improves water quality through pre-treatment and bioretention.
- Simplifies approvals with predictable, compliant performance.
- Delivers sustainability — 100% recycled materials with BRE EPD.
- Configurable system built from tested components — specify ArborFlow as a package or individual elements as required.
Applications
- Streets and squares needing predictable, set-rate discharge.
- Retrofit corridors requiring compact, above/below ground solutions.
- Authority-led schemes with strict SuDS approval processes.
Case studies
ArborFlow systems are already in use across Europe, combining healthy tree growth with compliant stormwater management in dense urban environments.
