1/2" NPT? Mine are 1/2" PEX, which requires a PEX crimping tool. A decent PEC crimper can be bought for $30+/-. I needed to make a repair, so I bought the crimper, a couple of feet of PEX pipe, a handful of various fittings, elbows, and valves, and for less than $75 I made my repair, and I've got a "PEX Toolkit" (which I've since used to re-plumb my previously difficult to access water filter AND make a repair on another campers rig) all for less than what a service call would have cost for the original repair!
2014 RAM 2500 Laramie 4x4 Quad Cab w/Cummins Turbo Diesel, 2009 Rockwood 2607, and 3 'yaks!
300W of Suntech Solar, a Rogue MPT-3024 Controller, and a Xantrex PW2000 Inverter