... . 6mpa6) Heat preservation: 72h7) Hail resistance: 25mm8) Tube standards: 14, 16, 18, 20, 24, 30, or 36 Heat Pipes with 58mm ... wool with red copper pipework station Including: Circulating Pump, Safety valve, Check valve, Pressure guage, Flowmeter and Expansion Vessel. Use this work station ...