I have looked at several but not close enough to make any sort of decision.
I plan to get one when I ever build but for now I will be ordering a
Berkeley water filter. The one in the link appears to be about as cheap as
any I have seen.
I did a test last summer and the most water volume I use on the trailer is 3
GPM. The price of the one you linked to looks cheap enough to just put in
place anyway.