One method of classifying pipes and fittings
is using schedules (wall thickness). Based on this classification, one of the top options out there is the PVC schedule 40. These are types of PVC pipes and fittings that are recommended for low-pressure water lines and drainages. The fittings are used for different purposes such as extending and combining flow. One of the common types of PVC schedule 40 fittings is the elbow. This fitting is designed to help change the direction of liquid flow in a line. Most elbows
are designed to help change the flow with 90 degrees, 60 degrees and 120 degrees.Another common fitting is the threaded coupling. The PVC schedule 40 threaded coupling is used for fitting two threaded pipes. You can also use the plain end couplings
with PVC glue to make joints. Other common PVC schedule 40 fittings that you can use include PVC slip tee, slip caps, and slip bushings.