Hello, I have a Danze D113000BT shower mixing valve. It has male ports described as "1/2 inch IPS threaded coupling connections". I bought female (I think I got that bit right!) 1/2" PEX by 1/2" FPT Propex adapaters to hook them up. Checking on the web, I came across the fact that IPS can mean "Iron Pipe Straight", and that connections with this feature should have a gasket (as in hose, or washing machine connections?). The instructions do tell me to use tape, so does that mean the threads are in fact tapered and IPS just means "Iron Pipe Size", and my FPT fittings are ok? It's all very confusing. Thanks for any help.