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Other Miscellaneous Seals Page 1 of 1 <br /> Rubber Test Reducers <br /> Installed inside a Tank Sump for air pressure <br /> testing of a rigid secondary containment pipe line <br /> such as fiberglass piping. The RTR rubber <br /> reducer includes a valve stem and the RRB <br /> rubber reducer has no air stem. <br /> PART SIZE <br /> NO. <br /> RTR- 31'x 211 <br /> 3020 <br /> RTR- 3.09"x 2" <br /> 3920 <br /> RTR- 4"x 3" <br /> 4030 <br /> 3"x 2 <br /> " <br /> t } <br /> RRB- 410 x 201 <br /> 4020 <br /> RRB- 411 x 311 <br /> 4030 <br /> http://www.envproduct.com/cat0therSeals2.htrnl 1012912003 <br />