Plumbing Services

Water Treatment Systems in Longmont, CO

Softer water, better-tasting water, and less scale on everything it touches. M&M installs and services water softeners and filtration systems sized for your home.

24/7 Emergency Service
Upfront Pricing
Family-Owned Since 1996

Softer, Cleaner Water for Your Whole Home

Many Front Range homes get water that is on the hard side, which means it carries more dissolved calcium and magnesium than your plumbing would like. You see the results every day: white crust on faucets, cloudy glassware, stiff laundry, and a water heater that slowly fills with scale. Some households also notice a chlorine taste or sediment, which hardness alone does not explain.

That is why water treatment is not one product. A water softener removes the minerals that cause scale. A water filtration system targets taste, odor, chlorine and sediment. Plenty of Longmont homes benefit from one, and some do best with both working together. Whole-home systems treat every drop at the point of entry, while point-of-use units such as an under-sink drinking water filter polish a single tap.

M&M Heating, Cooling, Plumbing & Electrical has been family-owned in Longmont since 1996. Our licensed plumbers look at your water, your plumbing and how your household actually uses it, then recommend the system that fits, with upfront pricing and no pressure. Explore the pages below to learn more, or contact us to get started.

M&M plumbing service vehicle
Signs Your Water Needs Help

Common Water Problems in Longmont Homes

If any of these sound familiar, a treatment system can make a noticeable difference.

Scale on Faucets & Showerheads

Chalky white buildup around fixtures and inside the kettle is the classic hard water signature. It also forms where you cannot see it, inside pipes and water heater tanks.

Spotty Dishes & Stiff Laundry

Minerals left behind as water dries cause film on glassware and make detergent work harder. Softened water rinses cleaner and lets you use less soap.

Chlorine Taste or Odor

Municipal disinfection keeps water safe, but the leftover taste and smell can be unpleasant. Carbon filtration takes care of it at every tap in the house.

Cloudy Water or Sediment

Fine grit, rust flakes or a milky look after a water main repair usually means sediment. A pre-filter catches it before it clogs aerators and appliance valves.

Water Heater Losing Ground

Rumbling, slower recovery and rising energy use often trace back to scale inside the tank or heat exchanger. Softening protects the investment you already made.

Bottled Water Habit

Hauling cases of water gets expensive and wasteful. A drinking water system at the kitchen sink gives you better-tasting water on demand for far less over time.

Softener vs. Filtration

Which Water Treatment System Do You Need?

They are often confused, but each one solves a different problem. Many Longmont homes end up with a softener plus a drinking water filter.

Whole-Home Filtration

Reduces chlorine, sediment, taste and odor for all the water in the house. Does not soften water on its own, but pairs well with a softener.

  • Better-tasting water at every tap and shower
  • Catches sediment before it reaches appliances
  • Low maintenance cartridge or media changes
  • Can be combined with a softener in one system

Point-of-Use Drinking Water

An under-sink system such as reverse osmosis polishes a single tap for cooking and drinking. The smallest footprint and a popular add-on to either whole-home option.

  • Dedicated faucet at the kitchen sink
  • Replaces bottled water for pennies a gallon
  • Compact, fits in most sink cabinets
  • Simple annual filter service
Why Homeowners Choose M&M

The M&M Difference

Water treatment done by licensed plumbers who have worked on Longmont water since 1996.

Matched to Your Water, Not a Sales Quota

We look at hardness, taste and sediment concerns before recommending anything. If a single softener solves it, that is what we will suggest.

Installed Right the First Time

Bypass valves, proper drain connections, correct placement ahead of the water heater: the details that keep a system working for years are the ones we do not skip.

Upfront Pricing, No Surprises

You see the full price before we start. No hidden fees, and no extra charge for nights or weekends if you need us after hours.

Backed by Our Guarantee

Every job carries our 100% satisfaction guarantee, and new equipment installs include our One Year Test Drive. If you are not happy, we make it right.

The M&M Family
How It Works

Our 4-Step Process

From the first conversation to clean water at the tap.

1

Assess Your Water

We talk through what you are noticing, check hardness and look at how water enters your home. That tells us whether softening, filtration or both is the right answer.

2

Recommend & Price

You get clear options sized for your household, explained in plain language with upfront pricing. Financing is available on new equipment if that helps.

3

Professional Installation

Our licensed plumbers install the system cleanly, with a bypass for easy service and the correct placement to protect your water heater and fixtures.

4

Set Up & Support

We program the system, show you how to add salt or change filters, and stay available for service, tune-ups and questions down the road.

4.9
★★★★★ 3,667 reviews
J R
2 weeks ago
★★★★★
M & M has been my go-to HVAC company since 2021, when they helped us choose and install a new furnace along with a complete heating and air conditioning system. The entire process was easy, and the new system made our home much more comfortable. Since then, they’ve been the only company I recommend to friends and family whenever they need heating, cooling work. It’s hard to find a company that’s consistently reliable, but M & M has always delivered. Their team is always prompt, communicates well, and keeps me updated by text/email throughout appointments, which I really appreciate. It’s the little things like that, combined with the quality of their work, that make them stand out. If you’re looking for an honest, dependable HVAC company that genuinely takes care of its customers I highly recommend M & M.
Sean Fitzgerald
3 weeks ago
★★★★★
Highly recommend M&M. I used them for both plumbing and electrical and experienced great customer service. The front desk was easy to work with for scheduling and payments. My plumbing technician David T. was excellent, communicating with me throughout the entire process and giving me the ability to weigh in on decisions that needed to be made. My electrical technician was Joey and he was fantastic. Extremely knowledgeable, easy to communicate with, and also continued to communicate throughout the entire job to make sure I was being included in decisions and able to give clarification when needed to make sure everything I needed done was being done. I could not recommend David and Joey highly enough!
Taylor Sarachek
a month ago
★★★★★
AJ and his trainee were fantastic. They were knowledgeable, gracious, respectful, and at the top of their game. They asked all the right questions, answered every one of mine, and took the time to explain my options without any pressure. I’ve only had pleasurable experiences with M&M, and this visit was no exception. If this is the standard they hold their team to, they’re doing it right. Highly recommend.
Read More Reviews

Water Treatment Questions, Answered

Do I need a water softener or a water filter?

It depends on what is bothering you. Scale, spots and dry skin point to hardness, which a softener fixes. Taste, chlorine smell or sediment point to filtration. Many Longmont homes have a bit of both, so a softener paired with a carbon filter or an under-sink drinking water system is a common setup. We will help you sort out which problem you actually have before you buy anything.

Is Longmont water hard?

Many Front Range homes receive moderately hard water, and hardness can vary by neighborhood, by water source and across the year. The surest way to know is to check your own supply. If you are already seeing white scale on fixtures or cloudy glassware, your water is hard enough to be worth treating.

What is the difference between whole-home and point-of-use treatment?

A whole-home system is installed where the main water line enters the house, so every faucet, shower and appliance gets treated water. A point-of-use system treats one location, usually the kitchen sink for drinking and cooking. Whole-home protects your plumbing and water heater. Point-of-use delivers the best-tasting drinking water in the smallest footprint. Plenty of homeowners choose both.

Will a water softener protect my water heater?

Yes, and it is one of the best reasons to install one. Scale settles in the bottom of a tank heater and coats the heat exchanger in a tankless unit, forcing both to work harder. Softened water dramatically reduces that buildup, which helps the heater run efficiently and reach its full service life. Pair it with regular flushing for the best results.

How much maintenance does a water treatment system need?

Less than most people expect. A salt-based softener needs the brine tank topped off with salt periodically. Filtration systems need cartridges or media replaced on a schedule that depends on the type of filter and your usage. We walk you through everything at installation, and our team can handle the routine service if you would rather not think about it.

Can you add treatment to an existing home, or only new construction?

Almost any home can be retrofitted. We find a suitable spot near the main water entry, often in a utility room, basement or garage, and add the system with a bypass valve so the rest of your plumbing stays untouched. Space, drain access and whether your home is on city water or a private well all factor into the recommendation.

Ready for Better Water in Longmont?

Open 24/7  |  Emergency Service Available

Call (720) 608-3973
Licensed & Insured Plumbers
Upfront Pricing
Financing Available
100% Satisfaction Guarantee

Water Treatment Across the Front Range

Proudly serving Longmont, CO and surrounding communities.

Primary Service Area

  • Longmont, CO
  • Erie, CO
  • Frederick, CO
  • Firestone, CO
  • Dacono, CO

Extended Area

  • Mead, CO
  • Johnstown, CO
  • Berthoud, CO
  • Niwot, CO
  • Gunbarrel, CO

Also Serving

  • Lafayette, CO
  • Louisville, CO
  • Superior, CO