Inquiry (采购产品): Poly Check valve Hello, My name is Greg Klein from Hydrogen Technology Applications. I build a gas generator and want to use youe check valve. The question I have is the proper way to plumb. I have all steel parker fittings. The check valve is poly and when screwing on to the steel fitting (with teflon tape) the check valve never appears to be tight (but seems to seal). What do you suggest to use. Regards, Greg Klein 330-454-8523 **** Hidden Message ***** Greg Klein 2011 Allen Ave suite A2 Canton, OH 44707 USA Company: Hydrogen Technology Apps Title: Director of Mfg. Phone: 330-454-8523 E-mail: gjkhta@sbcglobal.net **** Hidden Message ***** gjkhta@sbcglobal.net