Whole house pre filter

[Ryanerickson]

In my opinion it's not a good idea it will slow down to the point the drain can't keep up and possible one day flood if the emergency can't keep up I have done something like that before but it was on the return and had a 1.5" in and out worst case with that setup would be return slowing down. By the way I found putting the prefilter on the the return just a waste of time.