Philmac Female Adapter – IPS-OD | Connect IPS-OD PE Pipe to Male Threaded Fittings The Philmac Female Adapter IPS-OD is a compression-style fitting that transitions from IPS-OD polyethylene pipe to a female threaded (FNPT) connection. Use it wherever you need to connect your PE water line to a male-threaded valve, fitting, or piece of equi