Hi u/Mstormer!

For cannisters, I used cannisters from Ronaqua such as:

'https://www.amazon.com/gp/product/B01MEBM2C2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I found Oceanic Water Systems to be a great outlet for refills. Their website has good info and a variety of filter types for your choice. This one I chose for chloramine removal (which you probably won't need) carries an NSF rating:

https://www.amazon.com/gp/product/B07SHDM83G/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

You may browse the Oceanic website to uncover the specific cartridge types that apply to your particular water quality and use. Some of the chinese cartridge refills do not have NSF btw.

Here's my dedicated Car Washing Filtration rig photo. The DeIonization Resin is a Wash-Pak from ServaPure.com's website. Even though the rig puts out faultless water, we still don't use that water to mix baby formula with for our grand baby because garden hose parts construction (see distilled water cases background), but I wouldn't hesitate to drink it straight from the cannisters! PHOTO:

https://drive.google.com/file/d/1AizBB-5tjAr97wbLg0N_mzO9LUQs2uWs/view?usp=share_link

If you're not on well water and you're reducing TDS, include one of the activated charcoal filters as the core of your filtration plan (not necessarily first in line). If your solids are limestone as mine probably are, make a plan to remove that from there with the filters you choose. (EDIT: removing LEAD is a special case, you'll need to research that) While you're not buying a reverse osmosis unit, their promo ads and review websites will tell you exactly what cartridge does what, you can pick what's important and needed for your particular water from that. They're all types also available in cannister cartridge form.