Step 1

remove nuts on compression P trap

Remove the Nuts

Put on gloves. Remove the two nuts on a compression P-trap and it will drop right down.

Step 2

grab collar ring and twist counter clockwise

Twist the Collar Ring, and Look Inside

Grab the collar ring and twist counter-clockwise.

Slide it down, empty the water and look inside.

If the P-trap is not clogged, the problem may be deeper in the drain line.