3 x 4 Inch ABS Increaser/Reducer, ABS Construction. This particular fitting is an Increaser/Reducer for ABS Pipe applications and has a solid ABS (Acrylonitrile Butadiene Styrene) construction. The Increaser/Reducer has a 3 inch by 4 inch nominal size and is used to connect two pieces of ABS pipe. Depending on which way your piping is running, the fitting will act as either a reducer or increaser. In order to properly install this fitting, ABS cement is required to secure the fitting to the existing pipe and also to create a strong connection for other pipes and fittings in the system. Unlike PVC, ASB fittings and pipe do not need a “primer” in order to soften the pipe and create a solvent weld. This will save you time as you fix or construct your plumbing system. ABS pipes and fittings are used in a wide variety of DWV (Drain, Waste and Vent) applications. It can also be installed above or below ground due to its ability to be resistant to most acids, salts and alkalis.
