
Whole House Water Filter Installation
We test your water at the tap first. If chlorine isn't the problem, we'll tell you. If it is, we size the filter to your home and install it in part of a day.
There's no charge for the test, and no obligation to buy. It takes about 30 minutes at your kitchen sink, with nothing to prepare.
What Homeowners Say
Read our reviews on GoogleVery exceptional work!! Had someone come out to do a water test and install a reverse osmosis system under my sink. Super easy process and I am very happy with how it turned it out.… Haven't had any problems, highly recommend!
Excellent experience working with Nico at ClearGen Water. He was courteous, professional, and knowledgeable about our area's water, and our in-home tap water test was thorough and well-explained. This personalized review was great as Nico walked us through the results and how our family could best optimize our water quality in an honest, direct, and transparent way.… I'd highly recommend him to others as knowing what is actually in our tap water is so important, and you don't feel pressured to buy anything throughout the whole process. In fact, Nico went out of his way to learn about our water usage, what's important to our household in a water filtration system, and answered all our questions along the way. We could not recommend him more highly to others!
Very professional and diligent! Would highly recommend
Do You Need a Whole House Water Filtration System?
You probably do if your shower smells like a pool or every glass tastes of chlorine. That is the disinfectant your utility adds to keep water safe on the way to you. Hot water releases it in the shower, so a filter at the kitchen sink can't reach it.
A whole house water filtration system goes on the main line and takes it out before any tap or shower. The test at your tap shows how much is there, and if it's already low, we'll tell you.
- A pool smell in the shower, strongest with hot water
- A chlorine taste from every tap, not just the kitchen
- A softener you want to protect from chloramine

Do You Need a Chloramine Water Filter in Denver?
Probably, if you're on Denver Water, Aurora, Thornton, Westminster or Castle Rock: they all disinfect with chloramine. Arvada uses free chlorine.
Chloramine lasts longer in the pipes than free chlorine, which is why utilities use it, and it doesn't gas off in a pitcher on the counter. Taking it out needs catalytic carbon and enough contact time, which is why the tank is sized to your house.
In 2024, researchers identified a chloramine breakdown product, chloronitramide anion, that had gone unnamed for decades. EPA found it in all 40 samples it tested from 10 chloraminated U.S. systems. Its health effects are not yet known. Our guarantee is on total chlorine, which we can measure at your tap.

What Are the Benefits of a Home Water Filtration System?
Every tap and shower in the house loses the chlorine smell and taste, not just the kitchen. A catalytic carbon tank on the main line does it with no drain line and no electricity.
- Showers without the pool smell
- Water that tastes clean from every tap, the fridge and the ice maker included
- No drain line, no electricity and no regeneration water
- A softener behind it lasts longer, because chloramine wears out softener resin

How Long Does Whole House Water Filter Installation Take?
Usually part of a day. The tank goes on the main line where it enters the house, with a sediment prefilter in front of it. It needs no drain and no outlet, so it is often a simpler install than a softener.
A licensed plumber does the install, and we pull the permit where your city requires one. Before we install, we write down the number it has to hit: total chlorine under 0.1 ppm at the kitchen tap and a shower. Before we leave, we test both the same way. If it misses, you get your money back.

How Do You Maintain a Whole House Water Treatment System?
Mostly by changing the sediment prefilter, the cheapest part in the system, when it loads up. The carbon works until the bed is used up, which depends on your chlorine level and how much water you use.
So we measure rather than promise a date: a total chlorine test at the kitchen tap tells you when the carbon is due. We show you how on install day.

Do You Need a Water Filtration System and a Water Softener?
Only if your test shows both chlorine and hardness. They fix different things: carbon takes out the disinfectant, a softener takes out the minerals that leave scale, and neither does the other's job.
When you need both, the carbon goes first. Chlorine and chloramine are hard on softener resin, so the carbon protects it. Two tanks also let each one be sized properly and replaced on its own schedule.

Why Homeowners Choose ClearGen Water
ClearGen is a local water company, and Nico, who runs it, does your water test himself. You see every reading, and you keep them in writing whether or not you buy anything.
- We tell you when you don't need a whole house water filter, and show you the number that says so
- The target the system has to hit goes in writing before we install, and we retest to prove it
- Equipment that takes standard parts, so any plumber can service it
- A licensed plumber does the install, with the permit pulled where your city requires one

How it works
How Our Whole House Water Filter Install Works
The test takes about thirty minutes. Nothing to prepare except access to your kitchen sink and the spot where your main water line comes in.
- 1
Test
We measure total chlorine at your tap with a photometer and ask what you've noticed.
- 2
Compare
We put your readings next to what your utility publishes and go through them with you.
- 3
Recommend and Install
Only the tank your bathrooms and peak flow need. Installed on the main line, then retested at the kitchen tap and a shower.
Where it goes: on the main line, with a sediment prefilter in front. It's an upflow catalytic carbon tank, so there's no drain line and no electricity.
Questions
Whole House Water Filter FAQ
How much does a whole house water filtration system cost?
It depends on the tank size, which depends on your bathrooms and peak flow, and on the plumbing at your main line. We size it after the test and quote then. A small tank on a big house is the most common reason these systems disappoint, so we would rather size it right than quote fast.
How long does it take to install a whole house water filter?
Usually part of a day. The tank goes on the main line where it enters the house, with a sediment prefilter in front. It needs no drain and no outlet, which often makes it simpler than a softener install. We tell you how long yours will take after we've seen the spot.
What are the disadvantages of a whole house water filter?
It is a bigger install than an under-sink filter, the sediment prefilter needs changing, and the carbon eventually runs out. An undersized tank also won't remove chloramine at full flow. And carbon doesn't soften water or remove dissolved minerals: scale is a softener's job, and drinking-water purity is reverse osmosis.
How long do whole house water filters last?
The carbon lasts until the bed is exhausted, which depends on your chlorine level and your water use, so we measure rather than promise a date. The sediment prefilter is the part you change routinely. A total chlorine test at the kitchen tap tells you when the carbon is due.
Is there a water softener and filter combo?
Yes, and on most Denver-area city water it is the usual setup: catalytic carbon first, then the softener. A single cabinet that does both is convenient, but two tanks let each one be sized properly and replaced on its own schedule.
Will I lose water pressure?
A system sized for your home and your flow shouldn't cause a pressure drop you notice. That's why we size tanks to your bathrooms and household, not to a sales sheet. Tell us if pressure is already an issue and we'll check it during the test.
Can I install a whole house water filter myself?
A cartridge housing on the main line is a common do-it-yourself job, though a cartridge can't hold enough carbon for chloramine at whole-house flow. A properly sized catalytic carbon tank is heavier work at the main, and installing water treatment for someone else in Colorado takes a licensed plumber or a registered water conditioning contractor.
Are spin-down sediment filters worth it?
On water with sand or grit, yes: a spin-down screen catches the heavy particles and can be flushed instead of replaced. Treated city water usually carries little grit, so a standard sediment cartridge ahead of the carbon is enough.
Will I be pressured to buy?
No. No color-changing drops, no demonstrations and no two-hour pitch at the kitchen table. You get your readings in writing, what they mean, and a straight answer, including that you don't need anything. You keep the scorecard either way.
More questions (6)
Isn't Denver water fine?
It's treated and safe to drink. What most people notice is the taste and smell of the disinfectant. The test shows what's actually in your tap, and if there's nothing to fix, we tell you.
Do I need a softener in Boulder, Longmont or Fort Collins?
Usually not. City water there is already soft, so a softener wouldn't change the hardness number. If the taste or smell bothers you, whole-home carbon or drinking-water RO is the better fit.
Why does carbon go before the softener?
Chlorine and chloramine are hard on softener resin. Putting catalytic carbon first protects the resin and gives every tap chlorine-free water.
Do you install a water softener before or after a filter?
After the sediment and carbon filters. Sediment protects the softener valve, and carbon removes the chlorine and chloramine that wear out softener resin. On a well, iron and sulfur filtration also goes before the softener.
What are the disadvantages of an activated carbon filter?
Standard activated carbon handles free chlorine well but is slow on chloramine, which most of the Denver metro uses. Catalytic carbon breaks chloramine down far better, as long as the tank gives the water enough contact time. Any carbon eventually runs out, and none of it softens water.
What is the correct order of water filters?
Sediment first, then carbon, then a softener, then reverse osmosis at the kitchen sink. Sediment protects everything after it, carbon takes out chlorine and chloramine before they reach the softener resin, and reverse osmosis comes last because it treats only the faucet it feeds. On a well, iron and sulfur filtration goes before the softener, and UV goes last.
Whole House Water Filter Installation Service Areas
ClearGen Water installs whole-home carbon systems across the Denver metro and the surrounding communities. We're based in Parker, so we're never far away.
- Whole House Water Filter InstallationParker, CO
- Whole House Water Filter InstallationCastle Rock, CO
- Whole House Water Filter InstallationHighlands Ranch, CO
- Whole House Water Filter InstallationCentennial, CO
- Whole House Water Filter InstallationAurora, CO
- Whole House Water Filter InstallationDenver, CO
- Whole House Water Filter InstallationLittleton, CO
- Whole House Water Filter InstallationMonument, CO
- Whole House Water Filter InstallationThornton, CO
- Whole House Water Filter InstallationWestminster, CO
- Whole House Water Filter InstallationBroomfield, CO
- Whole House Water Filter InstallationArvada, CO
Neighborhoods we serve
- Parker
- The Pinery, Stonegate, Pradera, Idyllwilde, Canterberry Crossing, Stroh Ranch, Bradbury Ranch, Anthology
- Castle Rock
- The Meadows, Crystal Valley Ranch, Terrain, Founders Village, Plum Creek, Red Hawk
- Highlands Ranch
- BackCountry, Westridge, Northridge, Eastridge, Southridge
- Centennial
- Willow Creek, Piney Creek, Cherry Knolls, Southglenn
- Aurora
- Saddle Rock, Southshore, Tallyn's Reach, Murphy Creek, Blackstone, Heritage Eagle Bend
- Denver
- Central Park, Green Valley Ranch, Lowry, Washington Park, Cherry Creek, Hilltop
- Littleton
- Ken Caryl, Roxborough Park, Columbine
- Monument
- Jackson Creek, Promontory Pointe, Sanctuary Pointe
- Broomfield
- Anthem, Interlocken
Book Your Water Test
If you don't need a whole-home carbon system, we'll tell you.
We measure at your tap before we quote anything. You keep the readings either way.
There's no charge for the test, and no obligation to buy.