Rain Guardian Turret

Structural pretreatment built for everything from residential rain gardens to commercial sites.

The Rain Guardian Turret is a fully reinforced, monolithic concrete pretreatment chamber designed for long-term performance in bioretention systems. Its integrated base and structural design provide inlet stability, effective pretreatment, predictable hydraulic function, and adaptability across a wide range of site conditions.

Product Overview

The Turret is manufactured by Stoneworks as a fully reinforced concrete structure with a 4-inch integrated base. The unit is placed directly on a compacted crushed rock base prepared at the proper elevation, simplifying installation while providing a stable foundation.

Its structural configuration makes it suitable for residential, municipal, commercial, and industrial applications where durability and service life are primary design considerations.

Performance and Design Considerations

Hydraulic Performance
Designed overflow points ensure inflows are not restricted as water enters the bioretention practice.

• Inlet capacity: up to 1.82 cubic feet per second

• Outlet capacity: up to 3.45 cubic feet per second

• 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.