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The ADS 1218wt is a dual wall eccentric reducing bell end fitting designed for corrugated drainage pipe systems. It transitions from a 12-inch pipe to an 8-inch pipe using an eccentric bell end configuration, keeping one side of the pipe invert aligned for consistent flow control. Constructed from high-density polyethylene (HDPE), this fitting delivers chemical resistance and long-term durability in underground drainage installations. Licensed plumbers, civil contractors, and site drainage professionals are the typical installers for this type of fitting in stormwater and subsurface drainage applications.
This fitting is suited for residential and commercial drainage projects where pipe diameter reductions are required along a drainage run. The eccentric design is commonly specified when maintaining a consistent invert elevation is important, such as in gravity-flow stormwater systems and site grading applications. It connects to corrugated dual wall HDPE pipe and is typically installed in trenched underground drainage systems.
Designed as an OEM-style reducing bell end fitting for dual wall corrugated HDPE drainage pipe systems in 12-inch to 8-inch configurations.
Installation is typically performed by licensed plumbers or civil drainage contractors following applicable plumbing and stormwater codes. Always ensure the trench is properly bedded and backfilled per project specifications before placing the fitting. Confirm pipe ends are clean and free of debris before seating the bell end connection. Do not exceed the load ratings of the surrounding pipe system or use this fitting in pressurized applications.
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