how to install a compression fitting on plastic tubing

A compression fitting is a widespread type of plastic tubing. It is used, for example, in heating, solar and drinking water technology and is suitable for many tubing materials. The advantages of the compression fitting include the high level of security and the simple processing of the pipe connection. The following sections show how the screw connection is constructed, what is important when it comes to processing available on the market today.

How to install a compression fitting on plastic tubing?

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Structure and use of the compression fitting

The compression fitting is a type of plastic tubing connection which, in its simplest form, consists of a compression ring and a nut. The clamping ring is in the nut. During the screw connection, it slips into the screw connection body (socket or other fittings) and seals the connection.

More sophisticated systems also consist of a sealing element and a locking ring. The systems are easier to assemble. They do not deform and can therefore be used multiple times. In the case of simple constructions, the clamping ring deforms so that it can only be used once.

Installation of the plastic tubing connection is uncomplicated

The assembly of the compression fitting is comparatively easy. To do this, craftsmen put the nut and the clamping ring (depending on the system, an additional sealing element) over a deburred pipe. Then push this into the fitting body as far as it will go before you fasten the nut with an open wrench according to the manufacturer's instructions. While the turns of the nut are specified in some systems, other compression fittings can be easily tightened to a stop without any torque specifications.

The right material for the compression fitting

In order to prevent undesirable chemical reactions in the pipeline system, the materials of the screw connections must also be suitable for the pipe material used. For example, brass fittings for copper pipes are available. Among other things, couplings, plugs, T-pieces, angles, reducers and transitions to other pipe materials are available.

Advantages of using the compression fittings

The screw connections are easy to assemble and seal connections well even on hard pipe surfaces. In many systems, assembly is possible without a torque specification or special tools. It is gentle on the material and can even be used several times in some cases.

Various areas of application of the pipe connection

The compression fitting is used today in very different areas. Among other things, it is suitable for heating, solar and drinking water systems. But the technology also reliably ensures tight connections in gas, heating oil or compressed air systems.

Important for compression fittings in drinking water systems

When it comes to installing a drinking water or gas system, the connections must meet particularly high requirements in terms of hygiene and tightness. One indicator for this is the DVGW test mark, which must be available for all fittings in the areas mentioned. DVGW stands for the German Association for Gas and Water, which tests not only products but also companies and people for their suitability.

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