
i. Assure that all system radiators, piping and vents are absolutely leak tight. • When a steam boiler is installed in an existing system, ALL air vents should be replaced at the same time. This assures that the new boiler will not be compromised by existing system leaks. • If the system contains hidden supply or return piping (hidden behind walls, buried in concrete, etc.) pressure test this piping to assure there are no leaks. ii. Repair any leaks in the system. iii. Install accurate water met