New hot water boiler install. Have about 30ft of 1.25" black pipe. Various unions, Tees, elbows, check valves, threaded pipe clamps, etc. Usually it seems 1 inch fiberglass is recommended over the big box stores back foam pipe. (See photo.) Looking at metro-supply in clifton new jersey they have a product 'Fiberglass ASJ Max'. I could also insulate about 5-15 ft of near boiler/indirect 3/4" copper piping and up the hot water line a bit. Obviously I can't insulate over circulators. check valves? Like to get those zone valve and heating zone manifolds if possible.
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