BoilerMag 4" flanged magnetic strainer for commercial heating steam systems. This unit has a maximum gpm of 308 gpm, a maximum operating pressure of 170 psi without an air vent or 145 psi with an air vent, 7 magnetic rods, and a 1-1/4" NPT discharge connection. BoilerMagXT units remove damaging pipe residue such as sludge and iron scale. As condensate circulates through the system it flows through the BoilerMagXT and iron oxide and pipe scale is attracted to the magnetic rods and removed from circulation. These strainers are easy to clean and put back in service.