National Plumbing & Heating Supply Company · National Plumbing & Heating Supply Company · leaf 291
ools, producing a vacuum. The method of its operation is as follows; F is a double seated valve which closesagainst E and G. Air entering A will passup and flutter F, passing out via H. Whenthe water of condensation seeks to followit will float D, which will lift F and closeagainst G. When the… … A-2027
Plumbing · Heating · Residential water closets · Urinals and bidets · Residential lavatories and sinks · Residential shower receptors and basins · Residential laundry trays · Residential faucets supplies and trim · Drinking fountains · Gas-fired unit heaters · Condensing boilers · Radiators
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