yes cold water from a storage tank in the attic. Hot water from the immersion. When I looked it didnt seem that there was any problem with the tank filling up. There is lime in the cold tank though.
I have a thermostatic shower in my main bathroom which operates from a pump just above in the attic. The problem is that it loses good pressure within 5-10 seconds or sometimes it starts off with poor pressure. During those initial seconds the pressure is great, no problems. I think I can hear the p...