47 MECHANICAL WATER FEEDER Winters Thermometers • For residential or small

• For residential or small one-pipe or two-pipe systems

McDonnell & Miller 157S Series Data Sheet

ASME Section IV capacity certified bronze safety relief valve for protection of hot water heating boilers

centrifugal pumps with specific gravity greater than 0

• Replaceable Dura-Stat® module

47 MECHANICAL WATER FEEDER Winters Thermometers • For residential or smallWater Feeders Mechanical Series 47 47 2 Mechanical Water Feeders Low Water Cut Offs For steam and hot water boilers with cold water feed Continuous maintenance of minimum safe water level, independent of electrical service Proportional feed action Quick hook up fittings provided Quick change replaceable cartridge valve and strainer Optional features No. 2 switch Manual reset Model 47 can be field upgraded with a No. 2 switch to add low water cut off