Custom Water Filtration Solutions Based on Certified Testing in New Hampshire
Safe, great-tasting water starts with the right filtration system. At GSMS, we install whole-home and point-of-use water filtration systems that remove impurities, improve taste, and protect your plumbing and appliances. Whether your home is on a private well or city water, our process ensures your system is designed for your specific water quality — not a one-size-fits-all solution.
Call 603-424-8258 or contact us online today to schedule your free in-home estimate.

Water Filtration System FAQs
A water filtration system removes specific impurities such as sediment, chlorine, iron, or PFOA, depending on the filter type. A reverse osmosis (RO) system removes nearly all dissolved solids, making it best for drinking water. Many homes use both — whole-home filtration for general water quality and an RO system at the sink for purified drinking water.
It depends on the type. Standard cartridges may need changing every 2–3 months, while Pioneer filters can last up to a year. During your installation, GSMS provides a recommended maintenance schedule.
It depends. If you’re on municipal water, your undersink RO system may be enough for drinking and cooking. However, well water often benefits from additional whole-home filtration to protect plumbing, appliances, and showers. That’s why GSMS starts with certified water testing — so we design the right solution for your exact home.
The best system depends on your water quality. GSMS uses state-certified lab testing to identify issues like hardness, iron, bacteria, or PFOA, then designs a system to treat those exact problems.
Yes. We install Pioneer filters, designed to remove “forever chemicals” like PFOA and PFOS, which are a growing concern in New England.
Usually, city water meets safety standards. In most cases, filtration is about addressing nuisance issues like chlorine taste, odor, or staining rather than serious health risks. Many homeowners still choose whole-home filtration for improved comfort and better-tasting water throughout the house.
With regular maintenance, most systems last 10–15 years. Filters and UV lamps are replaced periodically, but the main system itself is built to last.
Yes. GSMS provides free in-home estimates. The only separate cost is the certified lab water test we perform to properly design your system.
Why Add a Water Filtration System to Your Home?
Tap water often carries more than just H₂O — from chlorine and iron to sediment, odors, and even “forever chemicals.” A professionally installed water filtration system gives your family peace of mind, improves daily comfort, and protects your home’s plumbing and appliances.
- Cleaner, better-tasting water: Reduce chlorine, iron, sediment, and odors.
- Health and peace of mind: Filter out contaminants like PFOA, lead, and nuisance bacteria.
- Protect plumbing and fixtures: Minimize scale buildup, rust stains, and soap scum.
- Longer-lasting appliances: Keep dishwashers, washing machines, and water heaters running efficiently.
- Flexible options: From under-sink carbon filters to whole-home solutions, GSMS installs systems tailored to your needs.
Common Water Concerns in Southern NH
Homeowners in New Hampshire often contact us for help with:
- Brown or rust stains in toilets, sinks, and tubs.
- Pink biofilm around drains caused by nuisance bacteria.
- Soap scum buildup on shower doors and chrome fixtures.
- Hard water makes it difficult to lather soap or shampoo.
- PFOA contamination — a growing concern in local well water supplies.
Whether you’re on city water or one of the many rural wells in New Hampshire, GSMS can test your water and design a system that solves these problems.
Certified Water Testing for Custom Filtration
What sets GSMS apart is our state-certified water testing. Instead of relying on quick, inaccurate handheld testers, we collect a sample and send it to a certified laboratory.
- Accurate results: You’ll receive a full, legal water quality report for your property records.
- Custom solutions: Based on the lab findings, we design a filtration plan that targets the exact issues in your water.
- No guesswork: Every filter, softener, or UV system we recommend has a clear purpose backed by data.
This ensures your investment in a water filtration system addresses your home’s real water quality concerns.
Water Filtration Systems We Install
At GSMS, we install WaterSoft water filtration systems, trusted for quality and long-term performance. Every installation begins with certified lab testing so the solution is designed for your home’s exact water quality.
Water Softeners
Standard two-tank softeners that reduce hardness minerals, protect plumbing, improve soap lather, and extend the life of appliances.
Whole-House Water Filters
Installed at the main water line, these systems reduce sediment, dirt, rust, and chlorine so every tap in your home delivers cleaner, better-tasting water. With the right system in place, you’ll protect plumbing, improve appliance performance, and enjoy consistent water quality throughout the house.
Pioneer Filters (POE)
A specialty point-of-entry (POE) filter designed to reduce PFOA, PFOS, and other “forever chemicals” as well as sediment. Unlike traditional cartridges that need monthly changes, the Pioneer filter lasts up to a year.
Reverse Osmosis (RO) Systems
Undersink RO systems that deliver purified, bottled-quality drinking water right at your kitchen faucet or refrigerator. Perfect for drinking and cooking, not designed for whole-house use.
UV Light Systems
Ultraviolet light disinfection systems that neutralize bacteria and microorganisms — a smart solution for well water homes in Southern New Hampshire.
Smart Pairings for Complete Water Treatment
Most homes benefit from more than one filtration method. At GSMS, we design bundled solutions that combine the right products to address every aspect of your water quality.
Water Softeners + Filtration
Pairing a water softener with a whole-home filter removes hardness minerals, iron, and sediment. This ensures cleaner water, protects plumbing, and improves lathering in showers and sinks.
Pioneer Filters for PFOA/PFOS
Concerned about “forever chemicals” in New Hampshire water? The Pioneer filter (POE) provides targeted protection against PFOA, PFOS, and sediment. It lasts up to a year, unlike traditional cartridges that need frequent replacement.
UV Systems for Well Water Safety
For homeowners on private wells, a UV light system is an effective safeguard. It neutralizes bacteria and microorganisms that standard filters can’t catch, providing peace of mind for families relying on untreated groundwater.
Water Filtration Maintenance & Lifespan
Like any home system, water filtration products require routine maintenance:
- Cartridge replacements: Standard filters may need changing every 2–3 months, while Pioneer filters can last up to a year.
- Water softeners: Require resin replacement and flushing about every 7 years.
- UV lamps: Typically replaced annually for continued effectiveness.
- System lifespan: Most water filtration systems last 10–15 years with proper care.
- Warranties: WaterSoft products come with 5–10 year warranties; GSMS includes a 1-year labor warranty (2 years for Home Club members).
Why Choose GSMS for Water Filtration
GSMS has been family-owned and operated since 1987, serving Southern New Hampshire homeowners for nearly 40 years. Our difference comes down to:
- Certified water testing: Every recommendation is backed by accurate lab data.
- Trusted products: We install only WaterSoft filtration systems.
- Complete solutions: From water softeners to RO systems to UV lights, we build multi-stage setups when needed.
- Local expertise: We understand the unique challenges of New Hampshire’s mix of well and city water.
- Family-owned values: We treat every home like our own, with service that puts your family first.
Get Started with Better Water in New Hampshire Today
You don’t have to live with stained fixtures, bad-tasting water, or expensive bottled water. Designed specifically for your home, GSMS’s custom water filtration systems will give you clean, safe, great-tasting water every day.
Call 603-424-8258 or contact us online today to schedule your free in-home estimate. Most installs can be scheduled within two weeks and completed in one visit.