Ads 1574an Dual Wall Eccentric Reducer 15x12 in Hdpe

Product Description

The ADS 1574an is a dual wall eccentric reducer fitting designed for stormwater and drainage piping systems. It transitions from a 15-inch pipe to a 12-inch pipe using a plain end connection style, making it a standard component in corrugated HDPE drainage networks. Manufactured from high-density polyethylene (HDPE), this fitting offers resistance to corrosion, chemical exposure, and soil stress. It is typically installed by civil contractors, drainage technicians, and utility crews working on subsurface drainage, retention systems, or site grading projects.

This eccentric reducer is suited for residential, commercial, and municipal stormwater applications where a controlled pipe-size transition is required. The eccentric geometry keeps the invert (bottom of pipe) aligned on one side, which helps maintain consistent flow and simplifies grade management during installation. It is used in culvert runs, detention system headers, and underground drainage laterals requiring a step-down in pipe diameter.

Key Features

• Dual wall construction provides a smooth interior bore for consistent flow performance
• Eccentric profile maintains invert alignment across the size transition
• HDPE material resists corrosion, abrasion, and common soil chemicals
• Plain end connections accept standard HDPE coupling or band seal gasket fittings
• 15 inches x 12 inches reducing size suits common large-diameter drainage transitions

Compatibility

Designed as an OEM-style replacement and standard fitting for dual wall corrugated HDPE drainage pipe systems using plain end connections in 15-inch and 12-inch pipe sizes.

Installation Notes

Installation is typically performed by drainage contractors or utility technicians following local grading and stormwater code requirements. Confirm pipe alignment and invert elevation before securing the fitting. Use approved band seal gaskets or couplings rated for HDPE plain end connections. Do not overtighten mechanical couplings, as HDPE fittings do not require the same torque as metal pipe joints.

Technical Specifications

• Fitting Size: 15 inches x 12 inches
• Connection Type: Reducing Plain End
• Fitting Material: HDPE
• Wall Construction: Dual Wall
• Reducer Style: Eccentric

Standard Information

• Brand: ADS
• Manufacturer Part Number: 1574an