Anode rod is for 'sacrificing' itself vs steel tank that Suburban uses.
Just keep on using an anode rod, flushing tank
Bathroom sink faucet....reduced flow hot/cold side.
First thing.have you removed the aerator screen on end of faucet, cleaned it and checked flow w/o it installed?????
IF YES and flow is still reduced.....those high quality plastic junk RV faucets have been know to fail --- replace with a residential faucet.
Course you could disconnect cold/hot sink lines and check flow thru them but usually problem is clogged aerator or faulty faucet