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Since 1979, CHASE ASSOCIATES, INC. has produced In-Swing and Out-Swing Manways and Watertight doors that offer safe, dependable quick-opening access into steel, concrete and poly storage or processing tanks.

Our primary product, the Chase Quick-Opening Hidden-Hinged Manway, provides immediate access of personnel and equipment into OSHA Permit-Required Confined Spaces such as tile-lined chests, steel tanks and processing vessels. Over 7000 Chase Quick-Opening Manways are providing tank maintenance access in Pulp & Paper manufacturing, Waste Water Treatment facilities, Ethanol Storage Tanks, Municipal Water Storage Tanks and other confined spaces .

Chase Associates is the only USA manufacturer to produce manways and related watertight access doors as its primary product. With over 25 years of supplying our customers the highest quality ASME workmanship and prompt, reliable deliveries the Chase Manway has been accepted as a standard by engineering firms and the manufacturing industry.

That is the reason we would like the opportunity to work with you on your access applications. When the job requires manways, think first of CHASE, THE MANWAY SPECIALISTS. We’re ready to help.