How do I connect 22mm pipe?

Our manifolds have a maximum internal diameter of 20mm, with an external diameter of 24mm. You cannot connect 22mm pipe to the outlets, but using a standard 1” or ¾” Male or Female BSP by 22mm compression adaptor, you can connect up 22mm copper or PB pipe to the inlet side. We have found over the seven years of using these manifold in UK new houses that you don’t need more then 15mm pipe for main unvented hot water cylinder supply.