Ran into something I never had a problem with before.. changing a filter on an oil tank. the filter was backwards it had the OUT at the tank side and the IN on the side to the burner I didn't want to mess with it right away since the tank had 200 gal of oil in it. Will this still filter properly and will the burner operate properly? No I am not a diyer just an item I am not familiar with. It does have a shutoff valve but I thought why mess with it if I don't have to.