☎ (559) 795-4083
September Special — the best pricing in the Valley

Reverse Osmosis Repair & Filter Changes in Fresno & Clovis

Slow flow, a leak under the sink, water that tastes off, or filters years overdue — Nick services most RO brands and gives you a straight answer: fix it or replace it.

Call Nick direct(559) 795-4083He answers his own phone. Evenings and weekends included.
  • Most brands serviced — APEC, iSpring, Culligan, Kinetico, Watts and more
  • Filter and membrane changes — same-week, usually same visit
  • Leaks, slow flow, empty tank, bad taste diagnosed on the spot
  • Honest call — if it's past saving, you'll hear that first
Under-sink reverse osmosis system serviced by Nick Alvarado in Fresno
Free in-home water testHardness, TDS, chlorine, pH
Licensed & insuredOwner-operator, not a sales rep
RO Service, Filters & Repair

Your RO system probably isn't broken. It's overdue.

Nine times out of ten, an RO system that trickles, tastes off or has an empty tank simply has spent filters or a clogged membrane. Fresno's water carries enough hardness and chlorine that pre-filters wear out faster than the sticker says. Nick carries common cartridges and membranes on the truck, so most service calls are finished in one visit.

If the leak is from a cracked housing, a failed tank bladder or a unit that's been patched a few too many times, he'll tell you that too — and give you a written price on a replacement so you can compare, with no pressure either way. New RO systems →

Not sure what you have? Text a photo of the unit under the sink to (559) 795-4083 and Nick will tell you what it needs.

What's included

  • Diagnosis of flow, pressure, tank and membrane
  • Pre-filter, post-filter and membrane replacement (most brands)
  • Leak repair: fittings, tubing, housings, faucet
  • Tank recharge or replacement
  • Sanitizing the system and checking TDS after service
  • Written price on a replacement if the unit isn't worth fixing
Most brandsAPEC, iSpring, Culligan +
Same-weekUsually one visit
TDS checkBefore and after
HonestFix it or replace it

Rather not call right now?

Leave your number and Nick calls you back the same day. No cost, no obligation.

Your info goes to one local owner-operator — nobody else. Ever.
Or just call — (559) 795-4083 · or text us

Start here

Sound like your house?

These are the things Nick hears on the phone before a ro service, filters & repair install. Any one of them is worth a free test.

🐢Water trickles from the RO faucet
💧There's water under the sink or the drain line drips
🤢RO water tastes or smells off
🪣The storage tank is empty or refills overnight
📅You can't remember the last filter change
🔧Someone installed it and disappeared

Sound familiar? Call (559) 795-4083 — Nick will test your water free and tell you what it actually needs.

How it works

Three steps. About a week, start to finish.

You call or text

Nick picks up or calls you back the same day, and picks a time that works — evenings and weekends included.

Free test at your kitchen sink

About 20 minutes. You see hardness, TDS and chlorine in your own water, and you get a written price for the exact system it needs.

Installed in about a day

Clean copper work, no mess left behind. 100% satisfaction guarantee on the install, plus the manufacturer's warranty on the system.

Reviews

Rated 5.0 on Google and 4.9 on Yelp.

Fresno Water Pros is the water division of Central Valley Home Upgrades, Nick's Fresno contracting company. These are his real customer reviews, word for word.

★★★★★
Reached out to Nick for a leak on my roof, his communication was prompt and came out the same day to quote. He is very knowledgeable and provided a competitive quote. The roof looks great and he'll be back to replace some additional broken tiles. An honest and good guy to work with, highly recommend.
Jorge C.Yelp review · Fresno · Nov 2024
★★★★★
Nick is very professional and someone you can trust. His variety of services, competitive pricing, and communication/responsiveness make him a pleasure to work with. Highly recommend!
Alicia M.Yelp review · Fresno · Aug 2025
★★★★★
Nick was very prompt on his response and reliable. His crews are easy to work with and respect the property. I would hire his company to do the future home improvements or upgrades.
Hiroko GuidoGoogle review · Google · 2026
5.0
★★★★★Google · 15 reviews
4.9
★★★★★Yelp · 36 reviews
Read all reviews
September Special

The best pricing in the Valley — and you'll get it in writing.

Nick is running his best pricing of the year on complete whole-home systems, softeners and reverse osmosis drinking water. No coupon, no gimmick: call, get your number, and decide on your own time.

  • Free in-home water test — a $149 value, no obligation
  • Written price the same visit — nothing gets installed until you say yes
  • Installed in about a day — usually within the week
  • 100% satisfaction guarantee on the installation, plus the manufacturer's warranty on every system
September Special

Call for your number

Nick gives you the special pricing over the phone or at the free test — whichever you prefer.

What we install

The right system for your water — not a package off a shelf.

Every home's water is different. We test first, then install only what your water actually needs. Systems by California Honest Water Co, installed and warranted by Nick.

Water Softeners in Fresno, CA

Water Softeners

Stops the scale, protects your water heater and appliances, and makes soap actually rinse off. Smart metered valve, USA-made softening resin.

  • Whole-house soft water from every tap
  • Metered regeneration — uses salt only when needed
  • Salt-free conditioner option
Water Softeners →
Whole-House Water Filtration in Fresno, CA

Whole-House Water Filtration

Filtered at the point of entry, so every tap, shower and appliance in the house gets clean water. Coconut-shell carbon for chlorine, chemical taste and odor.

  • Chlorine and chemical taste out of every tap
  • Pairs with a softener as one complete system
  • NSF-certified filtration media
Whole-House Water Filtration →
Reverse Osmosis Drinking Water in Fresno, CA

Reverse Osmosis Drinking Water

Bottled-quality drinking water straight from your kitchen tap. Multi-stage reverse osmosis with alkaline remineralization, tankless 800 GPD option.

  • No more hauling cases of bottled water
  • Alkaline stage adds the minerals back
  • Dedicated faucet, quick-connect fittings
Reverse Osmosis Drinking Water →
Well Water Treatment in Fresno, CA

Well Water Treatment

Nitrate, iron and sediment treatment for wells in Madera and the county. We test the well first and build the treatment around what's actually in it.

  • Free on-site well water test
  • Iron, sediment and nitrate removal
  • Softening for hard well water
Well Water Treatment →
Under-Sink Drinking Water Filters in Fresno, CA

Under-Sink Drinking Water Filters

Compact under-sink drinking water systems for renters, condos and smaller homes. Clean drinking water at the kitchen tap without touching the rest of the house.

  • Installs in a couple of hours
  • Great for renters and smaller homes
  • Upgrade to full RO any time
Under-Sink Drinking Water Filters →
Questions

RO Service, Filters & Repair questions, answered.

Do you service RO systems you didn't install?

Yes — most brands, including APEC, iSpring, Waterdrop, Culligan, Kinetico, Watts, Whirlpool and the big-box units. Text a photo if you're not sure what you have.

Why is my RO water so slow?

Usually spent pre-filters or a fouled membrane; sometimes low tank pressure or a bad tank bladder. Nick checks all four and fixes what's actually wrong.

How much does an RO filter change cost?

It depends on the brand and how many stages you have. Nick gives you the price on the phone or by text once he knows the unit — no trip charge surprises.

Should I fix my old RO or replace it?

If the housing, tank and faucet are sound, a filter and membrane change brings most units back to new. If it's leaking from multiple points or over 10–12 years old, a new tankless system is often the better money. Nick will tell you which, in writing.

Can you fix a leak under my sink from the RO?

Yes. Most RO leaks are at push-fit fittings, the tubing or the drain saddle — quick repairs. Cracked housings get replaced.

How fast can you come out?

Same week, often sooner. Evenings and weekends included.

RO acting up? Text a photo.

Free 20-minute in-home water test. Written price the same visit. Nick does the test, the price and the install himself.

Prefer a callback?

Leave your number — Nick calls you back the same day.

Your info goes to one local owner-operator — nobody else. Ever.
Or just call — (559) 795-4083 · or text us

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