PVC, CPVC Pipe Fittings and More for Water Distribution
Each type of water distribution pipeline will utilize a different style of fitting depending on its standards of construction. Traeger Brothers’ partner manufacturers compete to supply all of the common elbows, tees, unions, couplings and the like for each of the pipe valves and fittings in use. We supply the components you need and how you need them, providing options in PVC, CPVC, iron, steel, stainless and galvanized pipe fittings as required by your project.
Mechanical Joint connections
This style of pipe fitting is sized for use with ductile iron sized pipe; that is ductile iron or C900/905 PVC pipe. They can be adapted to work with IPS sized pipes with a larger gasket in their gland accessory package. MJ pipe fittings are cast of ductile iron to AWWA specifications and are lined internally with cement. These fittings are the US standard, with decades of installed success. They are designed for inexpensive, reliable service, are easy to install and have a long service life. Companies like Star Pipe and Sigma provide competitive pricing and high-quality fittings. MJ fittings are normally rated to 350 psi, with a 100 psi surge allowance.
MJ Pipe restraints
When coupled with a restrained gland follower, mechanical joint fittings can be secured against the pressure of the water in the system that is accumulated at every twist and turn. Without a restraint, the fittings would otherwise blow off the ends of the pipe, they are connected to. Calculations are required for each type of fitting (tee, elbow, cross) to determine how far the pipeline needs to be restrained upstream from the disturbance in its flow caused by the fitting installation.
Like bell end gasket pipe, these fittings just slip on the pipe. This style is best suited for lower pressure applications such as agriculture irrigation systems, but are still used for potable water distribution in many countries. Water pressures up to 235 PSI can be handled by these fittings, which are available in ductile iron and PVC.
Flanged ductile iron fittings are most often chosen for water treatment plant applications, in both potable water and wastewater applications. These fittings (as well as their MJ counterpart) are made of ductile iron, lined with cement to AWWA standards, and coated with bitumen epoxy. Optional fusion bonded epoxy coatings are available, as well as interior linings designed to protect the fittings from attack by aggressive elements in wastewater.
In HDPE piping systems, larger diameter connections require butt fusion. In this connection, a heating apparatus applies a heated plate to the ends of each pipe; once heated to melting temperature the two pipes (or fittings) are pressed together, and the welded connection is made. This system has also been adapted to a PVC pipe application with some success. Heat fusion apparatus can be purchased or leased and is available in several sizes and configurations to suit the job.
Another HDPE connection option is electro-fusion. Electro-fusion fittings slip over the ends of the pipe like a spigot/socket connection, but instead of using solvent cement to make the connection secure, a small heating element is molded into each fitting. Electrodes protrude from the fittings’ body, which is connected to the electro-fusion machine. When the power is connected, the fitting heats to a predetermined temperature, thus melting the plastic and fusing the fitting to the pipe.
The most common fitting is the solvent weld PVC type; the integral socket slips over the pipe for a tight fit; when coated with a solvent based cement it becomes a permanent connection. These PVC fittings can be utilized for connections from ¼” up through 24”, sizes under 10” are typically molded construction; larger sizes may be fabricated from the pipe.
Tapping Saddles are used to make new connections to existing water lines. These are available in steel or stainless, with a flanged, threaded or mechanical joint branch connection. With the use of a hot tap drilling machine, the service pressure may be maintained in the water main even while the connection is being made.
Can be used to connect smaller diameter PVC pipe and galvanized steel pipe. Through the use of male and/or female threaded adapters, copper, HDPE, and other pipe materials may be connected with threaded valves and fittings.