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Float & Probe Type Cast Iron Water Columns
Cast Iron Water Columns can be used up to 250 PSI

There are 3 purposes for Water Columns:

  • Support 1 or 2 water gage glasses

  • Float type high & low alarms

  • Probe type for alarms and low water cutout


Water Columns are not required on Power Boilers by ASME Boiler Code, but when specified, must be designed and manufactured to comply with Code.

Water Columns are considered to be a Standard Pressure Part as defined in PG-11 of the ASME Boiler Code. A code stamp or outside inspector for manufacturing is not required. Code recognized materials, qualified welding procedures by qualified personnel, and hydro testing are a must.

Float Type Column W0250-FA

  • Variable gage centers

  • Variable steam/water locations

  • Low & high alarm functions only

Column W0250 provides water gage centers that can vary upon specification from 13 ½” to 23”. Top or side steam and water connections can vary upon specification from 11 ½” to 22”. 


Conversion Columns   All Reliance cast iron, float type columns serving pressures to 250 PSI can be converted to accommodate a  probe cap. This conversion brings low water cut-out controls, as well as high/low alarms, to  converted columns. Consult us for more details.

Float Type Column W0250-FA water column

Probe Type Column W0250-EA

  • Variable gage centers

  • Variable steam/water locations

  • Low & high alarms and low water cut-out functions

Column W0250-EA type offers the same variations in water gage centers and steam/water connections as noted for Column W0250-FA.

Probe Type Column W0250-EA water column
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