Maxitrol M511R-1\/2

<b>Maxitrol M511R-1/2 Selectra Modulating Valve 1/2" (Right Side Outlet)</B><br>Maintaining consistent temperatures is no longer a problem. The unique Modulator or Modulator / Regulator valve, the heart of the Selectra Electronic Gas Flame Modulating System, provides precise, non-fluctuating, instantaneous temperature control without requiring any motor or mechanically driven butterfly valve.