Package C – Detention Tank For Lots 501–750 m²

Lot Size (m²) Active Storage (L) Orifice Size (mm) Subsurface Suitable? Backwater Valve? Trap? Tank 501 – 750 Meets 4600L Requirement 45 ✅ Yes ✅ Yes ❌No Norwesco Low Profile Includes: Norwesco Low Profile Tank + 45 mm Orifice Plate + Overflow Kit + Backwater Valve. Sewer Gas Trap to be external to the tank and to be supplied by others. This 4,600L package is designed for standard suburban lots, offering a balanced footprint and code-compliant performance. City of Vancouver Detention Tank Package for Lots 501-750 m² A Stormwater Compliance Solution Designed for Vancouver Residential Construction The City of Vancouver Detention Tank Package for Lots 501-750 m² is a complete underground stormwater detention system designed specifically to meet the City's 2025 rainwater management requirements for residential properties within this lot size category. If you are building a new home, replacing an existing house, constructing a duplex, multiplex, or undertaking a major redevelopment project on a lot between 501 and 750 square meters, the City may require on-site stormwater detention as part of the building permit process. This package has been developed to simplify compliance by providing the required storage volume and flow control components in one coordinated solution. What's Included? The package includes: Norwesco Low Profile underground detention tank 45 mm orifice plate Overflow kit Backwater valve The system is designed to provide approximately 4,600 liters of active stormwater storage, matching the City's requirement for residential lots within the 501-750 m² category. How It Works During rainfall events, water from roof drains enters the underground detention tank and is temporarily stored instead of immediately flowing into the municipal storm sewer system. A 45 mm flow control orifice slowly releases the stored water at the rate required by the City of Vancouver. This controlled discharge reduces peak stormwater flows and helps protect municipal infrastructure during heavy rain events. The overflow assembly safely manages larger storm events, while the included backwater valve helps protect the property from potential sewer backups. The entire system operates automatically without pumps, controls, or ongoing maintenance requirements beyond routine inspections. Built for Vancouver Projects This detention tank package is ideal for homeowners, builders, plumbers, and contractors working on residential projects that require compliance with Vancouver's updated rainwater management regulations. Instead of sourcing tanks, flow controls, and drainage components separately, this package provides a straightforward solution designed around the City's requirements. It helps streamline planning, simplify installation, and support successful permit approval for residential construction projects throughout Vancouver. Why Builders and Homeowners Choose This Package Unlike a standard underground water tank, this package is specifically configured for Vancouver stormwater compliance. The components have been selected to align with the City's Small Site Pathway requirements, helping simplify project planning and permitting. Benefits include: Designed for Vancouver regulations 4,600 L active detention volume Underground installation saves yard space Complete package with key components included Suitable for new residential construction Simplifies permit compliance Durable polyethylene tank construction Low Profile Tank Design The package uses a Norwesco Low Profile tank, which offers several advantages during installation. Its shallow profile can help reduce excavation depth compared to many traditional underground tanks. This may lower excavation costs and make installation easier on residential properties with limited space. The tank measures approximately: Length: 166 inches Width: 69 inches Weight: 592 pounds Constructed from durable polyethylene, the tank is corrosion resistant and designed for long-term underground service. Common Searches Homeowners and Contractors Use Many customers searching for this solution are looking for: Vancouver stormwater detention tank Rainwater detention system Vancouver Underground detention tank for new home Vancouver rainwater management requirements Stormwater compliance tank Residential detention tank package Lot drainage requirements Vancouver Underground stormwater storage tank City of Vancouver detention tank Permit-ready stormwater solution