The Multikwik Compression range has been created for security and reliability – as we know all plumbers need a fuss free 'no call back' installation... - Our compression nuts have been designed to be easily hand tightened and the connection is compatible with most plumbing pipe size and materials. - We only use high quality components including, but not limited to our compression nuts, slip ring and EDPM profiled rubber seal – these all ensure a secure watertight joint. - All fittings have a smooth, clean, internal surface that will facilitate self-cleaning and avoid debris build-up - To save you time on site, we have unique slip ring colour coding to aid size identification: Blue 32mm Red 40mm White 50mm