My Sprint suffered chronic heat vaporization last year, so I took my in-line filter off and all has been good since.
It never used to show much fuel in the filter while running, and one very hot day last year while keeping up with the traffic in the fast lane it cut out!
I let it cool down a tad, then drove it with the bonnet "popped" and although it hesitated a few times over the next sixty miles it never cut out at all.
When home, I took off the filter and binned it. I just rely on the actual fuel pump filter now..it's been behaving very well so far in all temperatures.
Now, if this means that my fuel pump is getting weak..I don't know, but when I do, I'll let you know.
I carry a new spare pump in the boot for when and if the pump dies..