I have a some brand new un-used Dwyer Mark II model 25 manometers that were in a box I bought at auction. (not my pic but this is exactly what I have) In perfect condition with unopened accessories package (fittings, oil, etc) I have one permanently mounted to monitor my wood furnace chimney draft. They work pretty good for checking static pressures in furnace duct work too. $27.50 each plus $7.50 shipping (48 states, others will be actual shipping cost based on location)
Ha! No joke, sorry. Pretty much a necessity to set your chimney draft if you have a tall chimney or anything in the basement, especially wood furnaces
Ok, anybody wanna buy a Dwyer Mark II draft tester? Better? (BTW, this is model 25, for anybody that cares)
some edumacation for y'all http://r.search.yahoo.com/_ylt=A0LEVxK3GfpVBBkARfhXNyoA;_ylu=X3oDMTByNXM5bzY5BGNvbG8DYmYxBHBvcwMzBHZ0aWQDBHNlYwNzcg--/RV=2/RE=1442482744/RO=10/RU=http://en.wikipedia.org/wiki/Manometer/RK=0/RS=LjTRtzznxQ6knxHMaWfXycbOA.8- http://r.search.yahoo.com/_ylt=A0LEVw8LGvpVS5QAxEZXNyoA;_ylu=X3oDMTBybGY3bmpvBGNvbG8DYmYxBHBvcwMyBHZ0aWQDBHNlYwNzcg--/RV=2/RE=1442482828/RO=10/RU=https://www.dwyer-inst.com/Product/Pressure/Manometers/FluidFilled/SeriesMarkII/RK=0/RS=awON8m0GsL8U_SiAHueYK.7xF14-