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Ps <br />ZOMMOUTIM, <br />011W-52131,11 & <br />quEENNAIUM <br />The OPW 523LP Pressure Vacuum <br />Vent is similar to the 523 except that it <br />is desi8ned with low pressure settings. <br />The 3" w.c. pressure. 8" w.c. vacuum <br />version is CARB approved for most <br />vacuum assist vapor recovers• systems. <br />Also available is a I oz. pressure. ; <br />