Squarely cut pipe to the required length, then all surfaces to be joined must be thoroughly deburred using a deburring tool. 

The surfaces must be free of foreign material and wiped with a clean cloth. Once cleaned, perform a dry fit to ensure no interference between pipe and fitting. 

Mark out the maximum depth to apply the primer and glue coating. 

Wearing appropriate safety clothing, such as nitrile gloves and safety glasses, coat with primer. The primer softens the joining surfaces and prepares it for good adhesion. While the surface is still wet from the primer, apply the solvent cement using a clean brush to the pipe and fitting. Pipe should be inserted into a fitting for the entire length of the socket to ensure a tight fit over the maximum surface area.

Once the pipe and fitting are joined hold together for a minimum of 30 seconds. Depending on the brand used, there may be different curing times before the piping system can be used.

For specific, comprehensive instructions please refer to the manufacturer's guides, the instructions provided above are a general guide only. Below are two videos provided by Weld-On for small and large diameter pipe jointing. Further information about Weld-on solvent cement and primer can be viewed on the Weld-On website.