Had a fitting break on the back of one our toilets on a Sunday in Quartzite. Water running everywhere. Used the shutoff valve to the middle bathroom toilet. Discovered there was no hardware store open.
No problem...had a second toilet. Paid for itself right then and there.
I now carry all the Pex fittings I need, actually I think they are Shark fittings.
We raised three girls...guess what Dad's priority was when it came to the bathroom. I was low man on the totem pole for sure.
Wouldn't have an RV without two toilets now.