National boilers, radiators, and specialties: catalog no26 . vacuum, List price, each «j2 00 No. 6 67 NATIONAL HEATING SPECIALTIES Hoffman Return Line Valve The Hoffman Return Line Valve is an efficient, reliable and dependableradiator trap; a thermostatic valve that is absolutely automatic and non-adjustable and operative under vacuum or plus pressures without any changeor adjustment whatever. This valve freely passes all air andwater but closes tight against steam. (Guaranteed for five years. Made in thei ir^fM| following sizes:PbTjII ^° 8 Hodman Return Lino Valve,r-??> H inch angle conne

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National boilers, radiators, and specialties: catalog no26 . vacuum, List price, each «j2 00 No. 6 67 NATIONAL HEATING SPECIALTIES Hoffman Return Line Valve The Hoffman Return Line Valve is an efficient, reliable and dependableradiator trap; a thermostatic valve that is absolutely automatic and non-adjustable and operative under vacuum or plus pressures without any changeor adjustment whatever. This valve freely passes all air andwater but closes tight against steam. (Guaranteed for five years. Made in thei ir^fM| following sizes:PbTjII ^° 8 Hodman Return Lino Valve,r-??> H inch angle connection, list price $ fT I I I Kv- 8 Hoffman Return Line Valve,ItlL. -y\w }4 inch right-hand offset connee-?feHH Hf Hon, list price 00|No. 8 Hoffman Return Line inch left-hand offset connec-tion, list price No. 8 Hoffman Return Line Valve,}4 inch angle straightway con-nection, list price 6. 00 No. 9 Return Line Valve, % inchNo. 8 angle connection, list price

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteambo, bookyear1920