Simple to connect and tighten - gives a perfect seal No cleaning, drying and glueing needed No more mistakes or having to use the hacksaw wasting time and money Can be used again and again Connects imperial to metric pipe Very flexible and forgiving - easy to apply in tight spaces If your pipe run is slightly out of line, these fittings will allow a slight deviation Ideal for permanent/temporary use or emergency repairs Ideal for the Koi keeper who likes to \'tinker\' - no wasting old fittings Ideal for connecting a ball valve, UV,circulating pump etc for easy removal Ideal for all types of hosetail connections