I’ve tried the usual remedies. On city water. Got into the basement, checked for “crushed” lines. All looks good as far as I can see. Located and removed a “plastic” check valve from the top of my Suburban W/H. Looks ok. Spring and valve intact. Moves well. “Burped” my H/W tank (trapped air?). Seemed to work for awhile (couple of hours), but it is still definitely slower than my cold side. Fluctuating too. Ordered a brass check valve from Amazon. (Cheap and relatively easy). Anything else I should be looking at?

Thanks everyone