Have had an outdoor wood fired boiler for several years. Has an open system. I have 2 sets of lines coming off, one goes to a heat exchanger in house basement-LP furnace with forced air. The other lines go to shop over a hundred feet away- there I hung insulated pipe in trusses of machine shed to ceiling mounted heat exchanger in shop. Separate pumps on each system and one is going downhill 8 feet to basement and other uphill 12 feet to shop, no special valves or controls on either line.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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