I see that the hep20 range has changed recently.
4th generation now. It's all white fittings and pipe now. Seems to work as well as before.They have boxes of free new-style de-mounting tools at the plumber's merhants, they hand them out when you buy new fittings. Be sure to grab a couple if you're getting new fittings.
Inserts etc compatable with previous system, but the new insterts are castelated to give a more positive indication of full insertion.