Just got a new softener. All I can find is SS corrugated flex pipe with FIP fittings at both ends. My Fleck 5800 valve has 1" male NPT so I either need 1" FNPT to MIP adapters (to fit available SS corrugated flex pipes with FIP at both ends) or a flex pipe with Female NPT which I cannot find! Can anyone point me towards a source? hanks.