It would do no harm to inspect them and see what they look like. But the water companies generally advise you to leave your taps on and run the water until its clear, so you should do that before hooking up your water to your filters ?
Makes no difference (the water is still brownish yellow)no matter how long I run the tap for...
I suppose that's what my sediment filters for so I'm just cracking on and hope the filters do their job..
Water pressure is low too(20psi) but my RO still works!
Actually thats not what your sediment filter is for (removing brown /yellow) out of your water. Its literally to remove "sediment"... anything larger than probably 5 microns. I don't even know how big a micron is, but i know its a defined size of a particle. The sediment is removed so it doesn't damage your membrane.
Perfect Windows...
Vin.

Put up a post a long time ago showing two glasses of water both 0 TDS , one was brown /yellow and one was clear . They'd both been through an RO and filters. But in short, your filters are only designed to remove particles and chlorine from clean water. Nothing else.