Due to the size of pipe you are cutting (32 or 40mm), you will need to get some of the shear-type cutters.

Tighten until the screw cap goes tight and then give it one final pinch and all should be fine. If you do find it leaks, simply screw up a little tighter. At this point, position the pipe so that the top cutting jaw is directly over the mark on the pipe, or just to the side if you have marked the cut point exactly on the line. Assembly of the unit is pretty straight forward. If you have several sections of pipe to put together it’s best to get it together on a bench or open space if you can, then insert it into it’s final resting place in one piece and slot together the final sections. Assembly is as follows:

For those that are new to plumbing, compression fittings provide the ideal introduction as they are easy to fit and adjust Screw Cap: The final piece of the puzzle, this holds everything in place and ensures that the rubber seal provides a complete seal between the pipe and the main body Flexible waste straight coupling allowing you to join two pipes from 38mm to 45mm and absolutely ideal in a conversion or renovation situation. This fitting is also available to convert from 30mm to 38mm and can be bought as a flexible bend from 40mm to 48mm To do this, use a fine piece of sandpaper, at least 280 grit or greater or a small file and gently run it around the edges until smooth – Don’t press too hard as you will scratch the pipe and this may cause leaks. Once done, the pipe is ready to fit.

As mentioned, the advantages with the shear-type cutters is that they leave no burrs so the pipe is ready to fit straight away. Assembling a Plastic Waste Compression Unit As above, measure and mark the position on the pipe that you want to cut, mark your point with a soft pen. Pump the handles which will operate the jaws of the shears and start closing them. As this is a ratchet system, one pump on the handle will close the jaws 10mm or so. Do this until the top cutting jaw is about 1mm off of the top of the pipe. Compression Waste Unit: In this case, this part is a 90° bend but can come in many different shapes. Made of solid plastic, it forms the main body of the compression jointPlastic Washer: Once the below screw cap is screwed up it applies pressure to the washer which in turn presses down on the rubber seal, holding it in place and ensuring it seals No matter what your plumbing installation project involves, our large selection of brass compression fittings will have you covered, from elbows and nuts to tank and tap connectors. Normally, these situations are encountered during DIY and home improvement works, especially when converting older properties that may still be using imperial sized plumbing pipes and fittings and any new work will be done using modern metric. Despite the above minor disadvantages, push fit plastic compression wastes do have many advantages that can be seen below: