After 6 months of issues with pressure loss and performance issues I found afterglow. A series of other engineers have failed to solve the issues. Afterglow were thorough and took steps to investigate the whole system. They were transparent with each step, explained costs and went above and beyond to solve the issue. My system is now working better than ever, as well as being protected from future issues. I will be using this company for all my plumbing and heating work in future!