i have seen this new grey speedfit is much more flexible than the white stuff, slighty more expensive but the fitting also in grey seem to be the same cost. As jg are not open to day for answers does anyone know if there is any difference between the fittins and could i start using grey pipe with the white fittins. I've done about half my house in the white stuff and it is pritty solid, also when pushed into fittings the strain of it is getting me a little worried, even after a few weeks it doesn't seem to bend straight it stays under strain unless the pipe gets fairly hot water in it. Should i worry or will it be OK? and is grey and white ok to mix, any difference between the 2 fittings. cheers Steve