Isn it dangerous mixing water and electronics?

A: Not really. The quality of the innovatek connection is, to all intents and purposes, fool proof. Not so push on connections that require tie wraps and clamps. We’ve never had a reported incidence of water leaks in dozens of systems. Water is only dangerous if it contains acids which allow it to conduct electricity. Distilled water is virtually inert so it acts as an insulator (unless you stick your fingers in it). And you don’t give a thought to lethal mains electricity running around your wet central heating system at home!