McDonnell Miller MA559 - Quick Hook-Up Fittings - Used With D4367

Product Description McDonnell Miller MA559 - Quick Hook-Up Fittings - Used With D4367 Overview McDonnell & Miller model number MA559 is a complete quick hook-up fitting for model number 67 controls. Quick hook-up fittings allow for installation directly into gauge glass tappings on the boiler and put the gauge glass onto the unit. Quick hook-up fittings for 67 Series.