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When a vent is less than 10 feet high, the vent should be at least as large as the flue collar outlet.b) Vents for draft hoods or flue collars 12 inches in diameter or less should NOT be reduced more than one pipe size.
A venturi meter with a 3 in. diameter throat is installed in a 6 in. pipe-line. The pressure at the entrance to the meter is gauge and it is undesirable that the pressure should at any point, fall below absolute.Assuming that for the meter is 0.96, find the maximum flow for which it may be used. venturi meter with a 3 in. diameter throat is installed in a 6 in. pipe-line. The pressure at the entrance to the meter is gauge and it is undesirable that the pressure should at any point, fall below absolute.