America's Most Popular, Highest Rated Under Sink Water Filter System for Decades & Counting. Legendary Support, Unrivaled Warranty, Made in USA. Ships Next Day!
I use cheap purewaterclub ones off ebay but heres a cheap one on Amazon. They last about a year depending how bad your water is then I just buy a new one when ppm starts getting around 50ppm. I hook a hose to washing machine outlet and run it in the tub. https://www.amazon.com/dp/B00204CQF6/ref=cm_sw_r_cp_apa_i_oQ86EbENMDG6Z
Amazon.com : AQUATICLIFE RO Buddie Four Stage Reverse Osmosis System with Color Changing Mixed Bed Deionization Cartridge : Livestock Equipment : Pet Supplies
OD Quick Connect Push in to Connect 1/4" Tube Fittings with 10 Meters Tubing Hose Pipe Set for RO Water Reverse Osmosis System, Push In to Connect Tube Set Pack of 12 (Y+T+I+L Type Combo + Ball Valve) - - Amazon.com