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The FERNCO INC P1070-33 is a flexible pipe coupling designed to join 3-inch corrugated ADS drainage pipe to 3-inch PVC pipe. It provides a watertight, shear-resistant connection between two common pipe materials that would otherwise require specialized fittings or adapters. This coupling is used in residential and commercial drainage installations where corrugated polyethylene pipe transitions to rigid PVC. Licensed plumbers and drainage contractors install this fitting during new construction and repair work to maintain flow continuity across dissimilar pipe types.
This coupling is suited for underground drainage and stormwater applications where corrugated ADS pipe meets PVC at a transition point — such as where a yard drain or French drain system connects to a solid PVC run leading to a cleanout or sewer stub. It accommodates minor misalignment and pipe movement, making it practical in trench installations with compacted or settling backfill. The 3-inch-by-3-inch sizing fits standard nominal pipe dimensions for both pipe types.
Designed for use with 3-inch corrugated ADS drainage pipe and 3-inch PVC pipe as an OEM-style transition coupling.
Installation is performed by licensed plumbers or drainage contractors following applicable IPC guidelines. Ensure pipe ends are clean and free of burrs, dirt, and moisture before seating the coupling. Tighten clamp bands evenly to manufacturer torque specifications printed on the product label — do not overtighten, as this can distort the sleeve and compromise the seal. Confirm proper pipe engagement depth on both sides before backfilling the trench.
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