Water Filtration & Treatment
Whole-house filtration, softeners, and treatment systems. SE Massachusetts and Rhode Island.
Better Water for Your Home
Hard water staining your fixtures? Iron leaving orange marks in the tub? Sulfur smell? Common across SE Massachusetts and Rhode Island, especially on well water. A properly sized filtration or treatment system fixes it at the source.
We install whole-house filters, water softeners, reverse osmosis, and UV treatment units. The right system depends on what is in your water. We test first, then recommend. No guessing, no overselling.
Installation includes all plumbing. On well water and need electrical for a UV system or pump? Our electricians handle that. Water heater struggling from hard water buildup? Ask about replacing it during the same visit.
Water Testing
Know what is in your water before buying
Well & City Water
Solutions for both
Full Plumbing Install
All connections handled
Electrical If Needed
UV and pump wiring by our team
Get Your Free Assessment
Our Installation Process & Brands
Free Assessment
We evaluate the space, measure rooms, and check your electrical panel. No cost, no obligation.
Custom System Design
We spec the right system for your home and put the price in writing before any work starts.
Professional Installation
Our licensed techs handle HVAC, electrical, and any panel upgrades. All in-house. No subcontractors.
System Training & Warranty
We walk you through the controls, register your warranty, and stand behind the work with a one-year labor guarantee.
What Does Water Filtration Cost?
Sediment and carbon filtration starts around $1,500 installed. That covers most city-water homes dealing with chlorine taste or sediment.
Water softeners run $3,000 to $6,500 depending on capacity. Bigger households and harder water need larger resin tanks.
Reverse osmosis systems cost $2,500 to $5,000 and UV treatment runs $1,500 to $3,500. Well water homes often combine stages, and we price the combination as one system rather than stacking separate installs.
You only buy the equipment that solves what is actually in your water.
Water Treatment Quick Reference (2026)
We test first. You only buy what solves the actual problem.
Why Homeowners Choose Triangle for Water Treatment
In-House Electricians
Most HVAC installers sub out the panel work. That means two companies, two schedules, two invoices. Our own electricians handle the panel work. One company, one invoice.
Mass Save Participating Contractor
We know which systems qualify, what documentation the program requires, and where homeowners usually lose money by picking the wrong equipment tier. We confirm your eligibility before you spend a dollar.
55 Years. Not a Startup.
Rebate money brought a lot of new companies into this market. Triangle has been at 425 Pleasant Street in Fall River since 1970. When your compressor needs warranty service in 2030, we will still be here.
Four Trades, One Company
Getting a mini split and notice the water heater looks rough? Want a generator quote while we are there? Heating, cooling, plumbing, electrical, refrigeration. One call, one truck, one bill.
How much does a whole-house filter cost?
Basic systems start around $1,500. Softeners: $3,000 to $6,500. RO and UV systems run higher. We test your water first. Call (508) 501-7424.
How do I know which system I need?
It depends on what’s in your water. A recent water test from your town or a lab tells us the iron, hardness, and sediment levels, and we quote the equipment that matches. Well water in Westport, Rehoboth, and Tiverton often runs high in iron. Softeners run $3,000 to $6,500, RO systems $2,500 to $5,000. Call (508) 501-7424 and we’ll walk through it.
Do I need a water softener in SE Massachusetts or Rhode Island?
Many homes have moderately hard water, especially on wells. White buildup on faucets or poor soap lathering means a softener will help and extend appliance life.
How long does installation take?
Most whole-house systems go in within a day. Softeners and single filters take a few hours. Reverse osmosis with a UV stage takes longer because of the extra plumbing and electrical.
What does a water softener cost in SE Massachusetts or Rhode Island?
Water softeners run $3,000 to $6,500 installed, depending on capacity. Bigger households and harder water need larger resin tanks, common on wells across Westport and Rehoboth. Whole-house sediment and carbon systems start around $1,500. Every quote is in writing before work starts.
How often does a filtration system need service?
Depends on the system. Sediment filters change every 3 to 6 months. Softener salt gets topped off monthly, and the resin lasts 10 to 15 years. UV lamps are annual. We set a maintenance schedule at install, or call (508) 501-7424 and we handle it.
Ready to Get Started?
Whether you need an emergency repair, a new installation, or a second opinion, Triangle is here to help. One call handles it all.