Ipex 027351 1.5" ABS Drainway Coupling. Throughout Canada, ABS-DWV (drain, waste and vent) piping has been successfully used in single family homes and general wood-frame construction. Builders and contractors have enjoyed the durability, ease of installation and overall value of ABS in providing a plumbing drain system. The pipe may be used both above ground and underground and is made in Schedule 40 pipe dimensions in either sold wall or cell core composition. Sizes range from 1-1/4” - 6” (32mm to 150mm) and a broad range of ABS DWV fittings are also provided by IPEX for complete system installations.