9 GPG City Water with Chlorine and Sensitive Skin: What You Actually Need

You got your water report back. Nine grains per gallon of hardness, 3 ppm chlorine, scale on every fixture, and two kids with sensitive skin who keep breaking out in dry patches after every shower. You have done the research. You know you need a softener and a carbon filter. The Fleck 5600SXT keeps coming up, and it makes sense on paper.

But before you pull the trigger on two separate DIY units, here is what most buyer guides leave out — and why an integrated whole-home system changes the math.

What 9 GPG hardness with 3 ppm chlorine actually does to your household

Nine GPG is moderate-to-hard water. You are past the "maybe someday" stage — at 9 GPG, scale accumulates on fixtures, inside appliances, and on the heating elements of water heaters within months. Soaps and shampoos lather poorly, which means you use more of them and rinse less effectively.

At 3 ppm chlorine, you are at the upper range of what municipalities typically add for disinfection. That concentration is what gives water its chemical edge — the taste you notice, the dryness on skin after showering, the slight bleach smell when you run the tap hot. For adults with normal skin, 3 ppm is tolerable. For kids with sensitive skin or anyone prone to eczema, it is a daily irritant.

The combination — scale-forming hardness plus chlorine — means you need two things working together: a softener that removes the calcium and magnesium, and a carbon filter that takes out the chlorine and its byproducts. That is exactly what most forum advice recommends, and it is correct. The question is how you put it together.

The Fleck DIY path vs. an integrated system

The Fleck 5600SXT is a well-regarded control valve. People who know water systems use it and trust it. The DIY path — Fleck softener plus a separate whole-home carbon filter — is legitimate and works when installed correctly.

Here is what the forums do not always tell you upfront:

• Two systems = two installation projects. You need separate bypass valves, separate connections to your main line, and enough space for both units plus their associated plumbing. For a family home with a standard utility room, this gets tight.
• Two systems = two service schedules. The softener needs salt. The carbon filter needs its media replaced on a different cycle. Warranty claims go to two different companies. If something fails, you are diagnosing which system is the problem.
• DIY installation is the single biggest failure point. The Fleck 5600SXT ships without an installer. Most problems in the first 90 days — bypass leaks, brine tank issues, incorrect resin — come from installation, not the product. If you are comfortable with plumbing, this is manageable. If you are not, it is a real risk.

Why an integrated whole-home system works differently

RKIN's whole-home line was built to solve the same problem the Fleck DIY path solves — but as a single, supported unit. The OnliSoft salt-free water conditioner and the Water Softener Combo treat both hardness and chlorine at the same point of entry, from one company, with one warranty.

For a family with your profile — 9 GPG, 3 ppm chlorine, sensitive skin — here is what matters:

One installation, not two

A single point-of-entry system connects once to your main water line. One bypass valve. One set of connections. The carbon filtration and softening happen in sequence in the same footprint. Most homeowners with basic plumbing skills can install it in an afternoon. RKIN ships the system with documentation, and the support team is reachable by phone if something is unclear.

Salt-based vs. salt-free: what the sensitive skin angle means

Traditional salt-based softeners replace calcium and magnesium ions with sodium. The water is softer, but some people — especially those on low-sodium diets or with skin sensitivities to sodium — notice the difference. Salt-free conditioners use a different process: they convert the minerals to a form that cannot stick to surfaces, without adding anything to the water. The water does not technically become "soft" by measurement, but scale stops forming, and there is no sodium added to the water or the drain.

For families with sensitive skin, the salt-free approach removes one more potential irritant from the equation.

The carbon filtration piece

The chlorine problem is addressed by the carbon filter stage, which adsorbs chlorine and chloramines before they reach your showers, taps, and appliances. At 3 ppm, a quality carbon block will bring that down significantly. The combination of conditioned water (no scale, no hardness deposits) and dechlorinated water is what actually changes how your skin and hair feel after showering — and what reduces the dry-skin flare-ups your kids are experiencing.

What to verify before buying any whole-home system

For your specific situation, confirm these four things regardless of which system you choose:

• Flow rate rating matches your household size. A family of four with typical morning demand needs a system rated for at least 11 GPM. Undersized systems create pressure drops at peak usage times.
• The system addresses both hardness and chlorine. Some systems are softeners only. Some are carbon only. Your water profile requires both, so verify the spec sheet explicitly covers both treatment stages.
• Filter replacement schedule and availability. You want to know that replacement media and filters will be available in 12 months. Check that the company sells replacements directly and that they are not proprietary items that go out of stock.
• Warranty covers both parts and labor. The RKIN whole-home systems carry lifetime warranties on the control valve and multi-year coverage on media. Compare this against the warranty terms on any DIY components you are evaluating.

The bottom line for 9 GPG city water with sensitive skin

Your instinct to address both hardness and chlorine is correct. The Fleck DIY path is a real option — it has a strong track record and a large community of users who can help with troubleshooting. The trade-off is two installations, two service schedules, and no single support contact when something needs attention.

An integrated whole-home system from a US-based company with a reachable support team addresses the same water problems with less installation complexity and a single warranty. For a family that wants the problem solved without becoming an amateur plumber, that difference is meaningful.

If your water report shows 9 GPG and 3 ppm chlorine, you are not over-thinking this — you are in the range where treatment genuinely changes how your water feels and what it does to your fixtures and appliances over time. The question is just how you want to get there.

See RKIN whole-home water treatment options →

OnliSoft salt-free water conditioner →

Frequently Asked Questions

Is 9 GPG hard water bad enough to require a water softener?

Yes. Nine GPG is in the moderate-to-hard range where scale accumulates on fixtures and inside appliances within months. At this level, most water treatment professionals recommend some form of softening or conditioning to protect plumbing and improve daily water quality.

Does chlorine in tap water cause dry skin?

For many people, yes — especially children with sensitive skin. Chlorine at 3 ppm (a common municipal level) can strip natural oils from skin during showers and baths, leading to dryness, irritation, and flare-ups for those prone to eczema or dermatitis.

What is the difference between a salt-based softener and a salt-free water conditioner for sensitive skin?

Salt-based softeners add sodium to water during the ion exchange process. Salt-free conditioners convert hardness minerals to a non-scaling form without adding sodium. For sensitive skin, both reduce the harsh effects of hard water, but salt-free systems avoid the slippery feel and sodium exposure some people prefer to skip.

Can I use a Fleck softener and a separate carbon filter together?

Yes. The Fleck DIY path — a salt-based softener plus a separate carbon filter — is a legitimate setup that works when installed correctly. The trade-off is more plumbing, more maintenance, and two separate units to manage instead of one.

How do I know if a whole-home water system is sized correctly for my family?

Check the flow rate rating on the spec sheet. A family of four with typical morning demand needs a system rated for at least 15 GPM. Undersized systems create pressure drops at peak usage times.

What should I look for in a whole-home water system warranty?

Look for a warranty that covers both parts and labor, specifies the coverage period for the control valve separately from the media, and comes from a company with a reachable support team. RKIN offers a lifetime warranty on whole-home systems with 7-year control valve coverage.