Advanced water retention,
detention, and infiltration systems
The Challenge: Why Stormwater Retention Matters
Modern construction projects — whether commercial, residential, or mixed-use — face growing pressure to comply with evolving stormwater management regulations. Local municipalities, state agencies, and federal bodies like the EPA require efficient solutions for controlling runoff, protecting groundwater, and preventing erosion. Yet many developers encounter problems too late in the process — when drainage issues stall approvals, cause redesigns, or lead to costly retrofits.
Conventional surface-level systems often fall short in today’s dense urban environments. Limited space, complex grading, and increased rainfall events demand more efficient, underground approaches to water retention. Without a scalable, engineered system, developers risk fines, construction delays, and infrastructure that doesn’t perform under real conditions.
Stormwater retention is no longer optional — it’s essential. Projects that ignore it early can face non-compliance penalties, jeopardize LEED certification goals, or fail to meet the expectations of municipalities and investors alike.
Our Solution: Scalable Stormwater Retention Systems That Work
At Apriori Source, we offer stormwater retention systems designed to solve the challenges modern developers face — from strict EPA compliance to limited site conditions. Our underground solutions manage runoff efficiently, reduce surface disruption, and integrate seamlessly with complex construction environments.
Each water retention system we supply is modular, scalable, and engineered to meet U.S. standards for stormwater detention and reuse. Whether you’re working on a multifamily development, a commercial buildout, or custom residential construction, our systems help you meet regulatory requirements while maximizing available land use.
We focus on long-term performance, durability, and sustainability. These are not off-the-shelf solutions — every system is curated through our global sourcing process and tailored to align with your project’s needs. The result: better water management, reduced compliance risks, and more efficient construction timelines.
Stormwater System Types We Offer
Water Retention Systems | Water Detention Systems |
| Designed to retain rainwater and relieve pressure on public sewer networks, these underground systems capture stormwater and either gradually release it or store it for future reuse—such as irrigation or greywater applications. Unlike traditional surface ponds, they allow for high storage volumes with minimal space and provide a controlled discharge via integrated flow-control shafts. Ideal for new constructions and retrofit projects in dense urban zones, these systems support sustainable site planning, reduce demand on municipal drainage, and align with LEED and other green building standards. | Detention systems protect against extreme rainfall by temporarily storing stormwater and discharging it at a metered rate to prevent sewer overload. Equipped with emergency overflow and flow-control devices, these systems ensure reliable flood protection and minimize stress on local infrastructure. They are essential for large-scale developments and flood-prone regions, offering regulatory compliance with EPA Phase II and local watershed ordinances. Their correct integration into site planning helps reduce delays, redesigns, and approval setbacks. |
Infiltration Systems | Modular Storage Solutions |
| These systems promote controlled drainage of stormwater into the subsoil, supporting natural aquifer recharge and improving water quality through soil filtration. Designed using specialized chambers or tunnel systems, they provide high infiltration performance with less excavation compared to gravel-based solutions. Their structural strength allows installation under roads, parking lots, and high-traffic pedestrian areas, making them ideal for space-constrained projects that demand both load capacity and environmental performance. | These space-efficient systems use stackable plastic modules that form underground tanks adaptable to different site conditions. Configured to meet volume, depth, and loading needs, they combine retention, detention, or infiltration functions depending on project requirements. Modular storage solutions offer excellent design flexibility, reduce transportation volume, and are fast to install. Their ability to fit under active surfaces—like driveways or staging areas—makes them a smart choice for modern construction where surface usability and stormwater compliance must coexist. |
Benefits of Stormwater Retention Systems
Maximized Land Use
Underground stormwater retention systems allow developers to preserve valuable surface areas for parking, driveways, or landscaping while still managing high stormwater volumes below grade. This is particularly beneficial in urban developments with limited land availability.
Modular & Scalable Design
Each water retention system is composed of modular units that can be scaled to match the specific footprint, depth, and stormwater load of your site. This flexible configuration enables seamless integration into both new and retrofit construction projects.
Regulatory Compliance
Built-in flow control devices and predictable discharge rates ensure full compliance with EPA Phase II requirements, IPC plumbing codes, and local municipal stormwater regulations. These systems reduce the risk of non-compliance penalties and approval delays.
Structural Strength
Stormwater detention and infiltration systems are engineered to support heavy vehicular loads — including HS-20 rated traffic — and resist long-term settlement. This makes them ideal for installation beneath roadways, parking lots, and loading zones.
Rainwater Harvesting Potential
Water retention systems can be configured to capture runoff for non-potable reuse, such as irrigation or mechanical systems. This supports LEED certification targets and helps reduce potable water demand on municipal supply networks.
Low Maintenance
Constructed from non-corrosive materials and designed as enclosed systems, underground detention tanks require minimal maintenance throughout their service life. This reduces operating costs and ensures long-term performance with fewer interventions.
Environmental Impact Reduction
By managing runoff on-site, supporting aquifer recharge, and limiting erosion, stormwater retention systems contribute to a more sustainable and resilient project footprint. They help reduce strain on public drainage infrastructure and improve overall water quality.
Compliance & Standards
At A Priori Source, we understand that stormwater systems must do more than perform — they must also comply. That’s why every retention and detention system we deliver is selected and configured to align with key U.S. regulatory frameworks, including EPA Phase II stormwater guidelines, IPC plumbing codes, and ASTM material and performance standards.
Our global sourcing model ensures that the systems we provide are compatible with site-specific municipal and state requirements across the U.S. Whether your project is subject to local infiltration mandates, discharge rate limits, or soil infiltration thresholds, we ensure that your system is configured to meet — and often exceed — those technical criteria.
Beyond compliance, our retention solutions support broader goals like LEED certification and watershed protection. We work closely with civil engineers and site planners to validate sizing, flow control components, and hydraulic capacity in accordance with both the latest regulatory codes and long-term environmental performance.
FAQ
Do I need permits or approvals to install a stormwater retention system?
Can retention systems be integrated into existing drainage plans?
How do I know what system type is right for my site?
Why Choose Our Products:
At A Priori Source, we do more than supply components — we manage complexity. From product selection to logistics, our team handles every stage of the stormwater retention system supply process to ensure your project runs smoothly, stays compliant, and meets all site-specific technical requirements.
We work directly with a global network of manufacturers, giving you access to best-in-class retention, detention, and infiltration solutions — without brand lock-in or markup-heavy intermediaries. Each system we deliver is evaluated against U.S. standards and tailored to your site’s dimensions, load requirements, and regulatory constraints.
Our process is collaborative and transparent. We coordinate with engineers, architects, and contractors to provide technical data, documentation, and installation guidance when needed. You get a single point of contact, streamlined communication, and a sourcing partner who understands construction from the ground up — not just a product catalog.
Maximized Land Use
By replacing traditional surface-level retention ponds with underground systems, we help developers unlock valuable real estate. Our solutions free up space for parking, logistics, or landscaping — without sacrificing stormwater retention capacity or code compliance.
Durability and Flexibility
Our retention and detention systems are engineered for structural performance in demanding environments. With load ratings up to 132,000 lb (HS-20 equivalent), they’re built for installation under roads, driveways, and high-traffic zones — without compromising lifespan or stability.
Sustainability Focus
We prioritize water stewardship. Our systems promote groundwater recharge, reduce surface runoff, and support stormwater reuse strategies. Ideal for projects seeking LEED points or aiming to meet municipal sustainability mandates.
Cost-Efficient Installation and Maintenance
Modular, lightweight components make transport and installation fast and simple — even on constrained job sites. With minimal maintenance requirements and no specialized tools needed, our systems reduce both upfront and long-term project costs.
Trusted Solutions for Modern Stormwater Challenges
Whether you're designing a stormwater management system from the ground up or adapting to evolving site and code requirements, A Priori Source provides more than just materials — we deliver certainty. Our team understands the technical, logistical, and regulatory challenges developers face and responds with practical, proven solutions.
Contact us right now to discuss your site conditions, performance goals, or compliance questions. We’ll help you source the right system — on time, in spec, and built to last.
Let’s build better infrastructure — together.