Section 10.22 - Boiler Discharge to the Building Drainage System(1)General. (a) Water entering the building drainage system shall not exceed 150 °F.(b) The pressure of boiler discharge into the building drainage system shall not exceed five PSI.(c) Steam discharge shall not be directly connected to a building, drainage system but shall first pass through a proper drain water tempering system or device.(d) Potable water connection to blow-off tank must be properly protected by a backflow preventer.(e) Types of devices shall include, but not be limited to, boiler blow-off tanks, automatic cooling facilities and drain water tempering devices. Figure 1: Illustration of Boiler Blow off Tank
Click to view image
Amended by Mass Register Issue 1331, eff. 1/27/2017.Amended by Mass Register Issue 1510, eff. 12/8/2023.