We have used Zac for several small jobs over the past few years - replacing an isolator valve, capping a gas supply that was no longer needed, fixing a radiator valve, replacing a shower thermostat, replacing a leaking header tank, and servicing the gas boiler. For each of these he has quoted fairly, came when planned, and done each job efficiently and expertly. He's knowledgeable, approachable, trustworthy and a good communicator. Recommended with no hesitation.