Points to help assemble compression joints

1). Using a hacksaw of pipe cutter, cut the ends of the pipe squarely. Then, using a flat file and a round file, remove any burrs from the cut end before proceeding. Earls Court Plumbers can advise on this.2). Put the cap nut on the pipe, followed by the olive. Look to see if the sloping edges of the olive are of equal length. If one edge longer than the other, it should face the fitting (this type of olive is known as a long taper olive).3). Push the body of the joint under the pipe, so that the pipe end butts up hard against the ridge inside the fitting. Slip the olive along the pipe until it is right against the fitting. Screw the cap nut on tightly by hand, the new spanners one on the cap nut and one the fitting to clench the joint.4). Usually, you will need to turn the nut one full turn to make the joint complete. If you over tighten, there is a risk that the olive will be squashed and the joint will leak. If you are in any doubt about the maximum turn, it is best to be careful and opt for a slightly under tightened joint.5). If by chance the olive gets crushed, are you find that the pipe is leaking, use a fine bladed hacksaw to cut off the olive. Make sure you don’t cut the pipe when you are doing this. Fit a new olive and reassemble the joint. Make sure that all the component parts along the way are clean and absolutely free from grit and dirt. An Earls Court Plumber carries out this type of work.6). There are two ways of adding an extra seal to a compression joint. You can use PTFE tape, or a sealing that looks rather like a white toothpaste, sometimes called boss white or plumbers mate. Although compression joints don’t generally need sealing compounds, if you have an awkward one that you can stop dripping, a turn of tape or a quick smear of compound should work.7). Once you’ve made the joint, turn the water on and watch carefully for leaks. Even if you discover a drip every half-hour, it still needs to be sorted. Unscrew the joint and add PTFE tape or sealing compound.

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