Cuprofit is made by Conex, quality therefore good. Cuprofit has some flexibility in the joint which allows the pipe to be slightly misalligned and still works. Much smaller in diameter hence easy to put two fittings side by side. Electical connectivity is maintained. Pull out strength superb, you need the disaasemble tool if you want to dismount, only a couple of quid. Valves etc easy to mount and can be rotated once in place to face the correct direction. Copper lasts, plastic as we have seen on other posts has had some problems. Sold at B&Q under the Plumbeasy brand.