Hey Buddy as a Master plumber and heating Expert I can tell you Forget the filter GET a Solco or other High quality Cast Iron WYE strainer with blow down.
Like ITT and other companies offer
Then on the discharge side of this WHY STRAINER install a “Blow down valve” Like a Good Quality Apollo.
Then you can blow out the particles like WE PROFESSIONAL Stationary Engineers do protecting the equipment from premature failure.
What the heck does a journeyman know about safe guarding heating equipment ESPECIALLY today as the union helpers are getting out of the programs knowing ONLY basic things like taking coffee breaks and giving erroneous business advice.
How about the Ditch digger and home center mentality guys who THINK they know something about heating or plumbing or drainage these MUTTS should practice BRAIN SURGERY self taught on themselves