Seeing as there are more and more beyonders getting into RV's I thought this might be an appropriate sub-forum.
Just finished a small repair on our RV, that, when it happened, pretty much crippled us for water.
The supply hoses that go to the bathroom sink. Well on our last trip, the little plastic connector broke. The only way to repair it is with 1/2" crimpers. The campground host didn't have any so I just "MacGiver'd" it by bending the pex pipe and taping it. It didn't seal completely, but slowed it to a drip, so that at least we were able to have running water to all the other taps.
Today I bought new brass supply connectors, as well added two in-line, brass shut offs. It's regular 1/2" Pex, so you can get everything at Home Depot. Do NOT buy them at the RV places. The shut-offs were $18 each at Woody's...$12 at Home Depot. They're not necessary but handy for future repairs. $10 for crimper rental, 20 minutes of time and Bob's yer Uncle.. it's better than new!!