Water treatment equipment
Residential water treatment equipment breaks into six types: ion exchange softeners (NSF/ANSI 44), sediment and carbon filters (NSF/ANSI 42 for aesthetic claims, NSF/ANSI 53 for health claims), reverse osmosis systems (NSF/ANSI 58), UV microbiological systems (NSF/ANSI 55), distillers (NSF/ANSI 62), and salt-free conditioners, which have no equivalent softening standard. Installed 2026 prices range from $170-$580 for an under-sink filter to $4,800-$8,000 for whole-house reverse osmosis.
Ion exchange softener. A resin tank plus a brine tank that regenerates on a timer or on demand. Fixr puts materials at $500-$2,000 and labor at $150-$1,000; HomeGuide puts installed salt-based systems at $1,200-$3,800 and dual-tank at $1,700-$5,000. Dual-tank matters if you need soft water continuously through a regeneration cycle.
Sediment and carbon filters. The workhorses. Whole-house carbon, mineral and sediment sets run $850-$1,400 installed. Cartridges are $15-$65 for carbon, sediment or iron media. These are the systems where standard-size cartridges versus proprietary ones makes a large long-term cost difference.
Reverse osmosis. Under-sink units run $300-$950; whole-house $4,800-$8,000. Filters are $30-$150 each every 6-12 months, membranes $40-$250 every 2-3 years, and whole-house RO elements $150-$250. UV sterilizers. Covered by NSF/ANSI 55, with Class A and Class B configurations that are not interchangeable - Class A is the more demanding rating. A whole-house set including UV runs $1,850-$2,900; lamps are $20-$100.
Water test kits. A DIY strip tells you roughly whether water is hard. It does not substitute for a lab. HomeGuide prices a basic professional hardness and water analysis at $130-$200, and the EPA points private well owners to state-certified labs, with local health departments sometimes testing at no cost. If you are making a four-figure decision, pay for the lab test.
Choosing water treatment equipment
The judgement calls that decide the bill, before anyone quotes you.
- Check the certification listing yourself WQA's Gold Seal is the industry's oldest third-party certification program and certifies to NSF/ANSI and NSF/ANSI/CAN standards. Look up the exact model, not the brand.
- Prefer demand-initiated regeneration NSF/ANSI 44 covers manual, automatic and demand-initiated regeneration. Demand-initiated units regenerate based on use rather than a clock, which is where the salt savings come from.
- Ask what a replacement cartridge costs before you buy A $15-$65 standard cartridge versus a proprietary one is the difference between a cheap decade and an expensive one.
- Check whether a dedicated circuit is needed HomeGuide puts a new dedicated electrical circuit at $250-$900 in labor and materials. That belongs on the quote, not in a change order.
- Confirm there is a drain and a bypass valve Softeners need somewhere to send regeneration discharge, and you want a bypass so a failed unit doesn't take your water with it.
All water treatment equipment
Ion Exchange Softener
Salt Free Conditioner
Carbon Filter
Reverse Osmosis System
Uv Sterilizer
Sediment Filter
Water Test Kit
Where these figures come from
Sources last checked
- Fixr - Water Softener Installation Cost · retrieved 2026-07-26
- HomeGuide - Water Softener Cost · retrieved 2026-07-26
- HomeGuide - Water Filtration System Cost · retrieved 2026-07-26
- ANSI - NSF/ANSI Drinking Water Treatment Standards · retrieved 2026-07-26
- WQA - Gold Seal Product Certification · retrieved 2026-07-26
- EPA - Protect Your Home's Water (private wells) · retrieved 2026-07-26
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