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Mark Associates: Markontrol 3/4" Zone Valve with Box and Instructions (c. 1966)

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A Markontrol 3/4-inch, 2-wire, 24-volt zone valve (Model No. 75W) for hot-water heating systems, with its original box from Mark Associates, Incorporated, 42 Epping Street, Lowell, Mass., and a fold-out instruction sheet copyrighted 1966. The sheet, illustrated with cartoon pin-up figures, tells the installer to leave the asbestos protector and flame barrier in place while soldering the valve into the line, then "remove asbestos cover & flame barrier as it is no longer needed"; its cover reads "CAUTION!! DO NOT Overheat When Soldering." The back carries wiring diagrams for 2- and 3-wire installations and relay information.

Made by
Mark Associates, Incorporated, Lowell, Mass.
Date
c. 1966
Artifact
Product in the AsbestosClaims.Law collection
Asbestos
The instruction sheet shows an "asbestos protector" on the valve and warns "Do not remove asbestos protector and flame barrier until soldering is completed"; the protector is not visible in the photos and nothing has been tested.
Library no.
ACL Doc 14751 · asbestosclaims.law/library/14751
Rights
Photographs by AsbestosClaims.Law of an item in its collection.

Cite this document

“Mark Associates: Markontrol 3/4" Zone Valve with Box and Instructions (c. 1966).” c. 1966. Mark Associates, Incorporated, Lowell, Mass. AsbestosClaims.Law Library. https://asbestosclaims.law/library/artifacts/mark-associates-markontrol-3-4-zone-valve-with-box-and-instructions-1966.

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