Help if u can. Always had problems keeping pressure up after being fitted 18 months ago. Found 2 leaks that plumber missed. But still losing pressure every 2 weeks. Noticed though when pressure was at 1.5 bar and ch had been on a while that the pressure increased . it was going above 2 bar and rising.. I turned heating off and it seemed to stabilise. Could it be poss that it rises above 3 bar and triggers the releif valve and then drains off water, thus over time losing pressure. Have u an answer to this prob. also are leak sealers recomended for small leaks.