1. (1) General.

   1. (a) Water entering the building drainage system shall not exceed 150EF.
   2. (b) The pressure of boiler discharge into the building drainage system shall not exceed five PSI.
   3. (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.
   4. (d) Potable water connection to blow-off tank must be properly protected by a backflow preventer.

   5. (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

      BOILER

      Boiler Drain Line

      Tank vent

      Blow-Off Tank Properly Trapped and

      Cold water __.L .. •''ac::= ==;

      Backflow Vented Indirect Waste

      Make-Up

      Preventer

      ~

REGULATORY AUTHORITY

248 CMR 10.00: 248 CMR 10.00: M.G.L. c. 112, § 61; M.G.L. c. 142, §§ 13 and 21.

(PAGES 213 THROUGH 254 ARE RESERVED FOR FUTURE USE.)