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We can land a rocket booster back on its launch pad. We carry phones that hold more computing power than the missions that reached the Moon. And yet, every week, millions of families drive to the store, lift 40-pound cases of bottled water into a cart, carry them up the stairs, and do it again the next week.

I’m Ray Abad, a civil engineer with 35 years in reverse-osmosis water purification. This series asks a simple question: why is there such a gap between the technology we have and the water we drink?

The technology already exists

Reverse osmosis (RO), a filter that pushes water through a membrane fine enough to hold back most dissolved contaminants, has been around for decades. It is one of the few household-scale methods that reduces short-chain PFAS, the small “forever chemical” molecules that many ordinary filters miss.

Small pumps, sealed bottle receivers like the ones in office water coolers, and simple level switches are cheap and reliable. None of this is new.

What’s missing is the pipe

Almost every home and building treats all water the same. The water that flushes the toilet is the same water that fills a child’s glass. So families who want better drinking water are left to haul it, or to buy whole-house systems that are often oversold.

A dedicated drinking-water line fixes that at the source. It is a small third pipe, next to the hot and cold lines, that carries purified water only to the places people drink from: the kitchen tap, the refrigerator and ice maker, and a spigot near each bathroom. Because people drink only a few gallons a day, that small amount can be treated to a much higher standard.

Added while the walls are open, the line costs far less than a retrofit later.

Why it hasn’t happened yet

Not because it is hard. Because nobody’s job requires it. Building codes don’t ask for it, so builders don’t install it. Buyers don’t know to ask. And the water business mostly sells products after the house is built, instead of infrastructure inside it.

That’s why I’m releasing this work openly: the reference design, the studies, and a proposed change to California’s building code (Title 24). The goal is not to sell one product. It’s to let builders, plumbers, utilities and manufacturers use technology that already exists.

What comes next

In this series, I’ll explain what we’ve found, one episode at a time: how the line can be supplied, what the zero-waste RO design does with its reject water, what’s proven and what’s still under study, and how the code change would work.

If you build, design, manage or regulate buildings, start with why every new building needs a drinking-water line. If you just want safer water at home today, Safe Home Drink has six plain steps.

Videos for this series are on the Safe Home Drink YouTube channel. Subscribe so you don’t miss the next one.

— Raymundo Razon Abad, civil engineer