Hot Water valve in home

Washer Repair
1

I have an Amanda washing machine that is from 2003, but the hot water valve/tap and hose are from a house built in the late 70’s. I am replacing the hoses and washers/gaskets. I noticed the washer connected to the hot water valve out of the wall has a plastic screen/strainer shaped like a thimble. Can anyone tell me the purpose of the thimble-like shape? Also, does this design have any effect on the water pressure going into the machine?

Thank you.

2

That is a rudimentary filter and as long as it is clean and clear it should not affect but enhance performance.

3

Could you please explain what is meant by enhance performance?

Also, is there a downside with replacing the thimble shaped strainer with a dome shaped metal screen for homes built in the 1970s.

Thank you.