Inquiry (采购产品): sewage vacuum check valve i work for the coast guard i'm on the uscgc Seneca and i need a 1 1/4" check valve for a vacuum systen the valve that we have on their now reads Pokorney 1 1/4" chicago if that helps the inside is a flaper type. thanks for your hwlp charlie williams **** Hidden Message ***** charlie williams 02109 Company: coast guard E-mail: charlie.w.williams@uscg.mil **** Hidden Message ***** charlie.w.williams@uscg.mil