A few years ago I spent some time with a magna fuel rep at a PRI show. He stopped by to look at one of the trucks in our booth. I mentioned that my pump would blow a fuse every now and then. He asked me if mine was plumbed like the one on display which it was. ( with filter before the pump.
He told me to put the filter after the pump.
I said are you sure and again he said AFTER the pump.
It's harder on the pump to pull fuel through the filter and can cause the pump to pull more amps than it's designed to. Also any small trash you get will pass through the pump and into the filter and not drop fuel pressure.
Filter the fuel good before you put it in the tank and you shouldn't have any problems.
With that being said, even BG web site use to have a diagram that showed how to plumb a system and it showed the filter before the pump.
I swapped mine and put it on the out side of the pump after I talked to him and have never had any problems.