Power Steering Unit Filter

I need to replace the power steering pump on my 340. The new pump assembly from NAPA suggests an in-line filter.
I have not heard of this before. The filter goes into the return hose. I wonder if the rebuild process leaves crud in the unit and the filter is recommended to catch it.
Have you added this type of filter on your PS units?

Thanks

I've never ran one but I am considering trying one on my new power steering pump.

i cant see where i would need this,but you might.id never even heard of one before.

I had never heard of them before either until I had to buy a new PS unit last week.
I read where if you have an OE unit and it has never been replaced, if it does not have one then there is no need to add one. But, If you have to replace your PS unit it is recommended by "some" of the manufactures to add an inline filter with the new/re-manufactured unit.
I checked four online sources for my PS unit and all four suggested an inline filter in the description of the pump.
I did purchase the above filter and I installed the PS unit and filter over the weekend. The filter makes sense and it can be taken apart and cleaned.
I still wonder if it is due to the manufacturers not running clean fluid thru the pump during tests which would suggest "floaters" inside of the unit when you buy it from the parts store. This may be their way of cutting down on receiving as many returns from customers.

Thanks for the replies.

Additional Info:

Yes,they're pushing them for all makes and models now when replacing a pump..And more than one manufacturer is making them....Considering what mileage I got out of the first pump{in a daily driver} I ended up flushing out the system good and just replacing the pump...But I see the need in certain applications...