Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 216
general way, being fitted with a union for air-line connections leading to a convenient point of discharge in the base-ment. Such valves prevent the escape of steam, because of the ex-pansion of the composition p\ug, which closes the opening when steam 179 4« STEAM AND HOT WATER FITTING comes in… … Fig. 05. Adjustable Dio and Stock. valves, as a rule, have no air-line connections, but discharge their airinto the rooms; a .somewhat objectionable feature. They close whensteam enters them; and if water rinds its way in, the float is raised andcloses the outlet. Air-valves for direct radiatv^…
Architecture · Building · Carpentry
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