@Czed ...I’m sure you’ve run across this *s-wordt as well. Trailer and mobile home water piping ain’t no regular sched 20 or 40 PVC diameters...and it ain’t PEX in those older trailers using crimp rings. Luckily a local HD and a Lowe’s carry some pipe/coupling/fittings, etc to get by with. If not...you gotta go to a mobile home place, and there ain’t but two around here...one in Macon, Ga, one in Cordele, Ga...to get what you need. And they proud as hell of it.
Try finding a damn door for a trailer at HD or Lowe’s... now the couple of mobile home places gotcha by the balls!