Referendex : a manual of architectural specifications and construction information, catalogue announcements of manufacturers and dealers in building supplies. (1914)
Referendex Company · Referendex Company · leaf 217
, and as there is no water seal it can not freeze. POSITIVE GUARANTEE—The Dunham Trap is guaranteed to give entire satisfactionon any vacuum return heating system. They will pass all air from the system withoutthe use of air valves, at the radiators, also all condensation, will close tight… … m D
Construction Materials · Architectural materials · Manufacturers catalog
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
