Detention Tank Package B – For Lots 401–500 m²
Lot Size (m²) Active Storage (L) Orifice Size (mm) Subsurface Suitable? Backwater Valve? Trap? Tank 401 – 500 3,900 35 ✅ Yes ✅ Yes ✅ Yes GRAF Platin 3900 ...
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| Lot Size (m²) | Active Storage (L) | Orifice Size (mm) | Subsurface Suitable? | Backwater Valve? | Trap? | Tank |
|---|---|---|---|---|---|---|
| 401 – 500 | 3,900 | 35 | ✅ Yes | ✅ Yes | ✅ Yes | GRAF Platin 3900 |
Includes: 3,900L GRAF Platin Detention Tank + 35 mm Orifice Plate + Overflow Kit + Trap + Backwater Valve
Ideal for mid-size residential lots, this 3,900L system provides compliant active storage for stormwater detention in Vancouver’s Small Site Pathway. With durable construction, easy access ports, and integrated flow control, this package takes the guesswork out of permit-ready installation.
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