I did a new installation of Fluidmaster (400ARHRK) on both fill valve and flush valve. Now the refill after flushing is much slower than before (took about 2 minutes).
I read the post and reply of why my toilet fill too slow, but it didn't seem to address my issue. I have opened the cap and water come out of it fine (probably not long as suggested 15 seconds). Some has suggested there is a flow restrictor inside the shank that I can pull out - I am not sure that is the root cause. Earlier I did another one with 400CR, just the fill, it didn't have this issue.
Any ideas or suggestions?