The gay roomie in the basement doesn't want a water filter. So obviously they do not get one. Don't you let the gay roomie in the basement make your decisions for you? 
So if it's the case and fagoomie has a reasonable case for his No Filter stand then get one of those Britta Pitchers and filter your own water for your own use. Easy-peasy simple solution.
I have this feeling LVL is still eating the same amount of food thinking that if he just eats what he considers healthier types of gigantic portions he'll lose weight. His plateau he currently resides on will become his home if he doesn't kick himself off of it. His metabolism will compensate for the food and exercise.
His carb intake can NOT be good for his diabetes. All that rice and potatoes are just converting over to sugar which his body is hoarding away because he's cut back on his normal sugar intake. He needs to drink more water, cut down the carbs and eat more filling useless foods with no actual nutrional value like celery and stuff like pork rinds that will fill his chewing cravings.
There are so many proven weight loss tricks out there that no one should be as big as he is, no one.