Hi guys. My Vokera Compact started leaking today from both heating cocks. It's just a slow drip so far. They do stop leaking if the heating is turned on but as soon as it cools down they start to drip again. I find it strange how they both started to leak at the same time. I have attached a photo of the heating cocks. I have priced new heating cocks up and was wondering if I could fit the replacements myself or can these be fixed ? We are very low on cash flow at the minute as we have just bought the house. I have done quite a bit of plumbing in the past so I'm sure I could easily replace the heating cocks but where do I stand legally on this? Any help would be very much appreciate. Thanks in advance. Kody.