Quote:
Originally Posted by Mike D
Before AND after! This will ensure you have a good flow of the purge through the system without any obstruction by the old filter.
|
I have always done this before and after. You are dealing with a lot of unknowns so it is best to be ready for the worst.
And if you find you don't need the few extra filters? Put them on the shelf and use them later. They will last 40 years as long as they stay dry.