The water supply system of plastic pipes comprises connecting elements, which are called fittings.
What are the compression fittings for plastic pipes? How to properly install? What should I do if the connection is beginning to leak? The answers to these questions, you will learn by reading the article.
Types, purpose, price
Compression fittings are used for:
- Compounds of pipelines and of various diameters.
- The ramifications of running water.
- Installation of additional equipment (filters, bottles, etc.)
- Changing the direction of running water.
- Compounds multilayer pipe with a metal or plastic.
Depending on the purpose can be divided into species.
corner metal
Used for changing the direction of the pipeline. Claimed elements with an angle of 90 and 120 degrees.
On a professional slang corner units called branches, so it is often used and the name of the metal corner fittings for plastic pipes.
Corner element used for connecting the water pipe of the same diameter, has a crimp fastener from both sides. There are outlets for composition systems in which one side has a thread, external or internal. These elements are intended for corner connections with different equipment.
Another variety - vodorozetki. They have a view angle with crimp attachment on one side and internal thread on the other. Additionally pad have holes intended for tight fixation with screws.
metal tees
Tees - species fittings for metal water pipes, which are used to branch from the main pipe, connecting valves or other elements.
Depending on the version, a combination of different mounts. For example, the two sides clamped fixing of one diameter, and the third - the screw or vice versa.
For the convenience of buyers manufacturers label tees size tubes or thread. As an example, consider the designation 20x1 / 2 "x20. This tee because in the designation of three digits, the two ends of which are intended for installation of the pipe, and the third has a thread. Pipe diameter, which is designed for tee - 20 mm, threaded connection ½ inch.
clutches
This type is intended for connecting pipes of different diameters or. The output is clamped fixing.
Clutch size depends on the diameter, for which it is intended. The most common:
- 20x16;
- 20x20;
- 32x16;
- 32h20.
The couplings may be performed with internal or external thread at one end. In this case the marking will look 16h3 / 4 ". First digit - diameter, the second - the thread resolution. Couplings with threaded connections are used if necessary transition from the metal pipe to Plastic.
Connection
For communication type composition pipe - the collector is used a special connecting fitting.
Depending on the type of execution may differ from one reservoir. As a rule, in the marking of the connecting fitting specified collector type lettering, for which it is intended. For example: EK - indicates that the element is used for reservoirs with outlet cone.
Crossings
The connecting element with four outputs. Anchorages outputs can be crimped or threaded, be combined in different embodiments.
Mounted as conventional metal structure, except when one of the outputs has a threaded connection. In this situation, the installation begins with a threaded connection.
Fittings Materials
Fasteners for pipes of metal may be made of different materials. The most common - brass with different surface. The coating is designed to protect the metal from corrosion and extend the life of parts. The sale can be found:
- Nickel-plated brass.
- Brass coated with tin.
- Nickel-plated brass plated with tin.
- Chrome-plated brass.
Popular variants of nickel-plated and chrome-plated brass.
There is also a steel and copper, but they are less popular. Copper due to high prices, steel - low resistance to corrosion and a small life.
The device and principle of operation
Structurally compression fitting consists of three parts: a base, the clamping nut and compression ring (cone). The system works on the principle of the collet, ie during tightening nut, it presses against the tapered ring which is compressed and presses the pipe securely to the base. It sounds complicated, but the reality is much simpler. The base has a seat for the hose of a certain diameter. It provided rubber pads. The diameter of the seat corresponds to the internal diameter of the hose, the nut has an opening equal to the outer diameter of the pipe.
assembly Procedure
The fitting is mounted on Plastic pipe according to a particular algorithm.
First, the pipe nut is worn, so that the thread has been directed towards the base (the junction). Further worn ferrule. The tube is put into place. The compression ring is moved to the base fitting up to the moment it will be possible to bait the clamping nut on the thread. In the last step using a wrench to lock the nut is tightened.
Important! Over time, the tube is in place fitting installation can begin to leak, to eliminate leaks it is necessary to tighten the fitting.
Features threaded fitting installation
For compounds with a metal pipe multilayer angled applied brass fitting with threaded connection with one hand. When installing such a fitting is a feature that should be considered. Must start with the installation of a threaded joint assembly, as Otherwise mount the connection will not work.
It should be borne in mind that the threaded connection is not always sealed to prevent leakage of better use of sealants or fumlentu.
Another aspect that should be considered when installing the fitting, this edge quality (the installation location) of the tube. Butt should be cut cleanly, do not bend or stretched.
Advantages and disadvantages of metal crimp connections
Compared with other types of compounds, crimp design have several advantages, the main of which - the possibility of reuse. Due to the fact that the design has a threaded connection and the clamping ring mount and dismount the fitting can be almost infinite.
The main fault that can occur due to frequent re-installation - the gap seal gum. This is easily remedied by setting a new gum from the repair kit that is sold everywhere.
The advantages include high speed assembly connections, the possibility of combining. With metal fittings can easily extend the tube or repair at the site of a rush.
Less metal fittings is that they are susceptible to corrosion. Over time, the connection rust, rot and can start to leak. In some cases, the broach does not resolve the nuts connection leak, the fitting will have to change.
Another shortcoming of metal compounds - is condensation that collects on the surface. When installed in the cold water supply system in case of insufficient ventilation constantly accumulates on the surface of condensate which may drip and accumulate in one place. This phenomenon can cause a number of negative consequences that can be avoided by using other types of connections.
Tools required for installation
Mounting of plastic pipes with metal compression fittings requires a minimal number of tools. In most cases, two keys are required, one to hold the base of the second nut. The home is convenient to use an adjustable wrench, because they are suitable for any size of fitting. You must also have a pair of scissors for pipes, by which is convenient to cut and trim the edges.
How to choose the fittings
Selection of coupling elements for water depends on its design and the particular location, so must be held at the planning stage. Having a plan that is easy to understand what will be needed to connect fittings, determine the number of corners in diameter.
The material is best to choose brass versions, they are cheaper and more practical. If there is no limit on the value, you can use copper, they are distinguished by a long service life and are resistant to temperature extremes.
In conclusion, the article would like to note that the construction market represented a large number of connections for plastic pipes, which can be confusing and not buy something. Help select the right sales consultants, which are guided in the range and are familiar with the principles of installation fittings.
