The Peerless Heater Company Catalog
We estimate that this cast-iron boiler catalog from The Peerless Heater Company in Boyertown, PA is from the 1980s or 1990s.
The Dunham Packless Inlet Valve
Packless radiator supply valves kept air from working its way into a vacuum system. This bulletin from C.A. Dunham Co. is from 1916 and features the Dunham Packless Inlet Valve. Thanks to David Cordes for sharing.
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