FIELD NOTES · HOME WATER
My Entire Whole-House Water Setup — Full Tour and Every Part
This is the full build — every component, in the order the water hits it, and exactly what each one does. If you only read one article on this site, make it this one. It's the system that took my water from corrosive and chloramine-heavy to balanced and clean.
Where I started: a real test, not a guess
I didn't build this on a hunch. I started by testing my own tap water and pulling my utility's annual water-quality report. Three problems showed up: the water was acidic (corrosive to copper plumbing), it carried chloramine (hard to filter, the source of that flat chemical taste and smell), and it was hard (scale on every fixture). That diagnosis is what shaped every part that follows. If your water is different, your build should be too — so test first.
Everything below is point-of-entry, meaning it treats the water where it enters the house, so every tap, shower, and appliance gets the benefit — not just one faucet.
Stage 1 — Sediment pre-filter (Pentek Big Blue)
The water from the street hits the sediment pre-filter first. It's a large Big Blue-style housing with a replaceable cartridge that strains out sand, rust, and grit. It changes nothing about taste — its entire job is to protect the expensive media downstream from clogging. My first used cartridge came out packed with rust-colored sediment that would otherwise have ended up in my tanks. It's the cheapest part of the build and arguably the most important, and I swap it quarterly.
Stage 2 — Calcite tank (pH correction)
Next the water enters Tank one, filled with calcite. Calcite gently raises the pH of acidic water as it passes through, neutralizing the corrosiveness that quietly eats plumbing and pulls metals into your water. This is the step almost every off-the-shelf system skips, and it's the one protecting my pipes and water heater. Balancing the chemistry first also means the carbon stage downstream isn't working against corrosive water.
Stage 3 — Catalytic carbon tank (chloramine removal)
The balanced water then flows into Tank two: catalytic carbon. Regular carbon handles chlorine but barely touches chloramine, which is what my city uses. Catalytic carbon is processed specifically to break chloramine apart, and a full tank gives the water enough contact time to do it properly. This is the stage that fixes taste and smell and removes the chloramine itself. By the time water leaves this tank, it's been balanced and cleaned.
The order matters: sediment, then chemistry, then polish
Sequence is the whole game. Sediment first protects everything. Calcite second fixes the corrosiveness before it can do damage. Catalytic carbon last polishes the water and strips chloramine right before it heads into the house. Reverse that order and you'd be using expensive media to catch grit, or running carbon against acidic water. Each stage sets up the next.
The result, and the honest caveat
After the full system, I re-tested at a treated tap: the chloramine smell was gone, the water was no longer acidic, and the dissolved-solids reading dropped from my baseline. I keep testing over time because honest results come from repeated measurement, not a single lucky reading. The point of this site isn't to sell you the biggest system — it's to show you a real one that matches a real water problem. Every part is linked below in the order the water hits it; choose the exact models that fit your own test results.
Common questions
Why does the order of the filter stages matter?
The sequence is the whole point of the build. Sediment comes first to strain out sand, rust, and grit so it cannot clog the expensive media downstream. Calcite comes second to fix the corrosive, acidic water before it does damage, and catalytic carbon comes last to polish the water and strip chloramine right before it enters the house. Reversing the order would waste costly media on grit or run carbon against acidic water.
Does regular carbon remove chloramine from water?
No. Regular activated carbon handles chlorine but barely touches chloramine, which is what this city uses. That is why the build uses catalytic carbon, which is processed specifically to break chloramine apart. A full tank also gives the water enough contact time to do the job properly.
Why is there a calcite tank in the system?
The starting tap water was acidic, which is corrosive to copper plumbing and pulls metals into the water. Calcite gently raises the pH as water passes through, neutralizing that corrosiveness and protecting the pipes and water heater. It is the step almost every off-the-shelf system skips, and balancing the chemistry first also keeps the downstream carbon from working against corrosive water.
How do I know what whole-house setup I actually need?
Test first rather than guessing. This build started by testing the tap water and pulling the utility's annual water-quality report, which revealed acidity, chloramine, and hardness. That diagnosis shaped every component, so if your water is different your build should be too. A TDS meter and test kit help set a baseline and verify results over time.