San Francisco, Calif. : Architect and Engineer Co · leaf 450
THB AIR BSOAPB /^^I shown on the exterior of this valve is made to conduct the foulair from a radiator into the basement, or where otherwise desired,and not allow it to be discharged into the occupied apartment. You have often experienced offensive odors comingfrom a radiator through the AIR… … IMPROVEDN04 ^ FOUR^AY-DRAIN PtRFECTlMUPii^
Architecture · Building
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