Water filter canister broke apart on its own

Here's a thread, titled "Exploding water filter" where somebody had the same experience as you. You will see that there are different causes.

Bruce

Yes, I have a Watts regulator. I am at my seasonal site and have spent more than 500 nights here. After 4 years and 11,000 miles it just had enough I guess. One of those things that just happens and you can't explain it.

lbrjet wrote:
...I know many people turn off the water every time they leave, and we are now joining that group. It was a clean break just beyond the threads. Pretty bizarre.

Do you have a good pressure regulator at the spigot? I have a Watts 283A and am comfortable enough to leave the water on when I am away from the RV for a few hours.

As for the failure of the filter - there was a thread on the Flagstaff forum where the filter housing "came off" from the head - more like walking back on the threads, as opposed to the break you described. The fix was to either change out the filter that came with the RV or put some other means of preventing the housing from unscrewing itself.

People always look puzzled when I tell them that I always shut of the pump switch and always shut off the campground water supply if we leave for a while.
RV=CHEESY

This is not unusual with cheap filter housings. If I was you, I certainly wouldn't use the same brand as a replacement.

Bruce