Most of these housings use standard sized filters, so you can put whatever brand you want in them. First 3 things I would recommend to anyone is:
1. Find out what is actually in your tap water to begin with (chlorine, chloramine, unusually high PH or hardness). Different water types require different types of pre-filtration
2. Get a booster pump. It literally doubled my output. I was running about 45 PSI while the system ran. I went from around 50 GPD to around 90 GPD with a Filmtec membrane.
3. Finally, get a good total chlorine test kit, and install a "t" with a valve after your carbon filters, and test for chlorine regularly. When it starts to come up, you need to change the carbon. You can deplete the carbon before you start to get a pressure drop.
4. After the RO breaks in for a few hours, test your waste water to clean water ratio. If it is too low you will not flush the membrane sufficiently, and will cause it to go out quicker.
Did I say 3 things....I meant 4 LOL
