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Info > Technical Tip
The two flanges on most threaded reducing flanges have a different number of bolt holes as indicated in the table below. When this occurs, all adjacent holes DO NOT straddle a centerline common to both flanges. A notch or mark on the O.D. of each flange is commonly used to indicate the centerline of the fitting. An alternative method is to find the parting line on the body of the fitting made by the casting process. Once the centerline has been established, there are four possible positions, each 90 degrees apart, to correctly install the reducer which insures matching the centerlines of adjacent piping.
Technical Tips for the Water, Sewer, Drain and Treatment Plant Industries

Technical tips are for informational purposes only.
Click for Technical Tip: Threaded Reducing Flanges .pdf
* Recommended torque is for use with FLANGE-TYTE ™ gaskets only, and for pipe and fittings rated at 250 psi water working pressure.
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