Advanced Drainage Systems

Advanced Drainage Systems (ADS) is the largest manufacturer of thermoplastic corrugated pipe in North America, and N-12 dual-wall HDPE is the standard specification for stormwater and site drainage: a corrugated exterior for strength and a smooth interior for flow.
Our ADS range covers N-12 soil-tight and plain-end fittings from 4 in. through 15 in. — 45 and 90 degree elbows, 22-1/2 degree bends, wyes, snap and bell-end couplers, end caps, and heavy-duty sump lids. Soil-tight (ST) fittings seal against soil migration at the joint, which is what most site drainage specifications call for.
Browse ADS N-12 drainage pipe and fittings below, with free shipping on qualifying orders.