You can’t just install the system and forget it. That’s like adopting a dog and never walking it. (Bad idea, sad dog, worse coffee.)
Water Filtration System For Coffee Machine at Carolyn Mendenhall blog
Mark your calendar to change filters every 3–6 months, depending on your water usage. Ignore the reminder? Your water will slowly turn into muddy, low-pressure sludge.
Also, buy a TDS meter (they’re like $15 on Amazon). Test your water weekly. It’s a tiny effort that saves you from pouring “meh” coffee for months.