I. PIPING DIAGRAMS - Water and Space HeatingExplore further
2014-7-21 · 4. The minimum pipe size for connecting to a water storage tank is 1 ½'. 5. The minimum pipe size for connecting the boiler is 1 ½' for the Mod Con 300 VWH and 2' for the 500 and 850 models. 6. All pumps are shown with isolation flanges or full port ball valves for isolation. The alternative is standard flanges with full port ball valves and a
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