GRP pipes are light in weight and can be supplied in long sections, often longer than 12m.
The making of the joints is a very fast operation that does not require specific skills or special equipment. The methods shown here below are all valid alternatives.

Some of the suppliers, including ourselves, offer pipes with bell and spigot joints built as an integral part of the pipe length so to avoid the handling of other components such as sleeves or mechanical couplings.

An additional feature, which is extremely useful to reduce the installation cost, is the testing nipple which is supplied on the bell in a position that coincides with the middle of the annular chamber formed by the two O-Rings.

Using a small hand operated pump, five minutes and a glass of water it is possible to test the tightness of the joint immediately after it is made.
In case any leakage is found the last pipe installed can be pulled out and the gaskets can be replaced and the joint re-tested without compromising at all the progress of the installation.

The advantages provided by this simple and quick test are very important.
The first is to know that the work done is well done; the second is that the final hydro-testing can be carried-out on longer lengths of pipeline, for example 1000-1500 m, saving on time and reducing the cost for anchor blocks and water.
The pipes can also be supplied with a locking key that prevents pull-out when the pipe is under pressure.

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