Let's go step by step and install a great RO system under your sink, save money on water! This unit is designed, engineered and assembled in the USA! The filters and Pump are made in the US too.

Links:

Reverse Osmosis system, NOTE: choose 0-30 psi option, it is a far superior system and works with all pressures: https://amzn.to/3nGhcN3

Icemaker, Refrigerator Kit: https://amzn.to/3r7Vaoz

Tubing Cutter: https://amzn.to/30SyPQG

Screws to Hang Unit (1" Long): https://amzn.to/49edGi9

Screws to Hang Unit (3/4" Long): https://amzn.to/3OMenay
Tools for Installation:

Adjustable Wrench Set: https://amzn.to/3nLupUV

Drill Bit for Drain (1/4"): https://amzn.to/3HQ8nIw

Zip Ties to Organize Lines: https://amzn.to/30O2vPC

I like this RO system because it does not rely on proprietary filters, instead the unit uses industry standard housings, filters, and plumbing. This means you can buy parts anywhere and not be beholden to the manufacturer. I've installed two of these units and they are of good quality.

Here is the description from Amazon:

Top tier US brand, high performance Drinking water system provides refreshing crisp taste, superior to bottled water
Highest grade 5-stage ultra-pure system with 100% US made filters to guarantee water safety & your health
US made ultra quiet pump, for low pressure homes (0 - 30 psi), to maximize input water pressure and accommodates the well water and overseas applications where standard RO systems would not function
Remove up to 99% of contaminants including arsenic, chlorine, lead, fluoride, heavy metals, bacteria, virus and 1000+ contaminants
Supreme quality – designed, engineered and assembled in USA to guarantee water safety & your health