What is the minimum size for blowdown pipes on a water column?

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The minimum size for blowdown pipes on a water column is critical for ensuring effective drainage and minimizing the risk of water hammer or blockages. A blowdown pipe allows for the removal of sediment and impurities that settle in the water column, which can affect the operation and efficiency of the boiler.

The choice of 3/4 inch as the minimum size is based on standard practices and codes which specify that this size provides adequate flow capacity while preventing excessive velocity that could lead to erosion or turbulence. Using too small a diameter could restrict the flow and defeat the purpose of the blowdown, while a larger size may be unnecessary and could complicate installation and maintenance.

Choosing the correct diameter is essential for the efficient operation of the boiler and contributes to safety and reliability.

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