PVC unions and PVC pipe union connectors are pipe fittings designed to connect two pipes together without the use of a sealant or traditional glued coupling. ... This means that wherever you use a PVC union to connect pipes together these pipes can be disconnected and worked on with relative ease.
What is the purpose of a union fitting in plumbing?
A union also connects two pipes, but is quite different from a coupling, as it allows future disconnection of the pipes for maintenance . In contrast to a coupling requiring solvent welding, soldering, or rotation (for threaded couplings), a union allows easy connection and disconnection, multiple times if needed.
What are union fittings?
Advantages. Pipe Union is a type of fitting equipment designed in such a way to unite two pipes which can be detached without causing any deformation to the pipes. Any kind of small diameter piping connections requiring a positive seal and easy assembly as well as disassembly are made with the help of pipe union.
What is a PVC slip union?
Slip unions are used when you have a need to take the pipes apart again. ... Slip Unions are used when joining to two smooth pipe ends together . The male and female union sections cement or glue onto the smooth pipe ends and then the union is screwed together to form the joint.
How does a pipe union fitting work?
A union is used when you are trying to join two pipes together that are fixed , thus unable to be turned. A union is very similar to a coupling, except that it can be unscrewed into two separate pieces and then screwed back together when both separate ends are attached to the two pipe ends that need to be joined.
What is the correct way to install a pipe union?
Thread the male half of the union nut onto the left-side pipe, and tighten it securely . Slip the ring nut portion of the union onto the right-side pipe with the threads facing outward. Thread on the other half of the union nut, and tighten it securely.
How long will a PVC compression fitting last?
As one of the most-used plumbing materials, PVC pipe is known for being very durable and long-lasting. In fact, PVC pipes last approximately 100 years .
How do you tighten a union fitting gas?
Tighten it in place with a crescent wrench . Screw the union’s other end nut onto the other pipe end, again tightening it with the wrench. Wrap yellow sealing tape twice clockwise around the union’s central thread for gas lines (white sealing tape for galvanized lines).
Which side is the nut side of a union?
The “nut side” of the union should be the entering side .
What is the purpose of a PVC union?
What are PVC Unions and Why Use them over Similar Types of Pipe Fittings? PVC unions and PVC pipe union connectors are pipe fittings designed to connect two pipes together without the use of a sealant or traditional glued coupling .
How tight should a PVC Union be?
The right way to assemble a threaded PVC joint-Schedule 40 or 80 is finger tight plus one to two turns-no more . Two turns past finger tight plus the stress of the system pressure is within the tensile strength of one-inch PVC. ([1,788 psi x 2] + 2,000 psi = 5,576 psi). Don’t use Teflon tape, Teflon paste or pipe dope.
How do you soften PVC union?
A Tight Connection
This connection is supposed to be permanent, but you can actually break it by heating the plastic . At a temperature between 250 and 350 degrees Fahrenheit, the plastic and glue both soften, allowing you to pop the pipe out of the fitting.
What are the different types of pipe fittings?
- Elbows: Used to change the angle or direction of the pipe run. ...
- Street Elbows: One end of the pipe fitting has male threads and the other end has female threads. ...
- Tee Fittings: Shaped like the letter T. ...
- Couplings: Used to join two straight pieces of pipe of the same diameter.
