OO/HO Gas Works (Low Profile)

OO/HO Gas works (notice my make is cut to 45 degrees as i have a sloping ceiling, and needs some basic kit bashing). see http://www.thingiverse.com/thing:2169497 for windows for main works building

Part 1: General Pipe
Part 2: Exhauster Vents
Part 3: Ammonia Washer's
Part 4: Iron Sponge Purifier
Part 5: Benzol Plant
Part 6: Gas Holder

PDF of elevations is A1@1:1 (HO/OO) scale