Rain Guardian Turret
Structural pretreatment built for everything from residential rain gardens to commercial sites
Product Overview
The Rain Guardian Turret is a fully reinforced, monolithic concrete pretreatment chamber engineered for long-term performance in bioretention systems. Designed to provide a stable inlet, effective pretreatment, and predictable hydraulic function, the Turret performs reliably across residential, municipal, commercial, and industrial applications where durability and service life are primary design considerations.
Manufactured as a single-piece reinforced concrete structure, the Turret includes an integrated 4-inch base that allows it to be placed directly on a compacted crushed rock foundation prepared at the proper elevation. This structural configuration simplifies installation while providing a stable platform suitable for a wide range of site conditions and contributing drainage areas.
Performance and Design Considerations
Hydraulic Performance
Designed overflow points ensure inflows are not restricted as water enters the bioretention practice.
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Inlet capacity: up to 1.82 cubic feet per second
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Outlet capacity: up to 3.45 cubic feet per second
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Internal storage volume: 4.02 cubic feet
Ponding Depth Flexibility
The Rain Guardian Turret is designed for a standard 12-inch ponding depth.
With minor field modifications, the unit can be installed in bioretention practices with both shallower and deeper ponding depths. For shallower practices, a course of retaining wall block can be used adjacent to the chamber to achieve the proper installation elevation. For deeper practices, a gradual slope that is properly stabilized can be used to transition from the base of the Turret to the base of the bioretention practice.
Site-Specific Customization
The Turret can be customized to accommodate most non-standard inlet angle configurations. Left-turn and right-turn configurations are available.
