ABSTRACT

Coffee Break Training: Eccentric Reducers   [open pdf - 146KB]

"Today's illustration shows a close-up of an outside stem and yoke valve (far left) on the suction side of stationary fire pump assembly. Between the OS&Y valve and the pump suction flange where the pressure gauge is attached is a fitting called a 'tapered eccentric reducer.' The purpose of this fitting is to transition the pipe size from the incoming water supply--in this case 6 inches (152 mm) in diameter to fit the pump suction flange that is 4 inches (102 mm) in diameter. It is called 'eccentric' because the center axis of the fitting is not in the same plane at either end. This picture shows a common installation problem that the fire inspector should identify and have corrected right away. The eccentric reducer is installed upside down. The 'flat' side that is parallel to the floor should be on top."

Report Number:
Coffee Break Training - Fire Protection Series No. 2008-4
Publisher:
Date:
2008-01-22
Series:
Copyright:
Public Domain
Retrieved From:
United States Fire Administration: http://www.usfa.fema.gov/
Format:
pdf
Media Type:
application/pdf
URL:
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