Hi, I ve called a guy to do the BSS examination but he said that he can come and do it only if there is already a Bubble Tester installed in the Gas system of the boat. I Have NO IDEA if there is or not. I need to contact a Gas certified engineer to see if there is or not that Bubble tester and in case to install it plus at the same time I need to buy and install a hot water boiler. Any contact, names, number ? Please asap. Thank uuuuuu ( Hackney Wick area)