Do water filter warranties cover replacement cartridges?

Generally not. Cartridges, media and membranes are maintenance items, though defects may be covered. Check your written terms.

Does a warranty cover labor?

Sometimes, and often for a shorter time than parts. Ask whether labor is included and by whom.

Will using other brands of filters void my warranty?

The FTC says a manufacturer generally cannot require specific parts unless it provides them free or has a waiver. Certified claims, however, apply only with listed cartridges.

Does a water system warranty transfer to a new owner?

It depends on the terms. Ask before you buy if you might sell the home.

What is the difference between a warranty and a service plan?

A warranty covers defects; a service plan or extended contract is sold separately and may cover maintenance.

What Is Included in a Water System Warranty?

The pieces of a typical warranty

Component	How warranties often treat it
Tanks (media, brine, RO storage)	Often listed separately from other parts
Control valve and electronics	Often its own term
Housings, fittings, faucet	Varies; check the list
Cartridges, media, membranes	Usually maintenance items, not covered except for defects
Labor and service calls	Often shorter than parts coverage, or not included

These are general patterns, not any specific product's terms. Your written warranty controls.

Manufacturer vs installer warranties

There can be two layers. The manufacturer covers its equipment against defects. The installer or dealer may separately cover workmanship, such as leaks at the fittings they made. Ask who you call when something goes wrong, and whether labor is covered under either one. The FTC advises asking whether you contact the manufacturer or the original seller, and whether you have to pay for labor or shipping for repairs.

What usually voids or limits coverage

Installation that does not follow the manufacturer's instructions.
Using the system outside its rated pressure, temperature or water conditions.
Damage from freezing, flooding, fire or other events.
Unauthorized modifications or repairs.
Not registering the product, if registration is required.

The FTC notes that a manufacturer generally cannot require you to use specific parts or service to keep a warranty valid unless it provides them free or has an FTC waiver. Separately, a third-party certified claim, such as a contaminant reduction claim, applies only with the replacement cartridges listed for that model. See reading a certification listing.

Warranty vs service plan

The FTC points out that an extended warranty or service contract is different from the warranty that comes with a product. A service plan may include filter changes, sanitizing or salt delivery. Ask exactly what is included, how often, and whether it overlaps with coverage you already have.

Implied warranties

Under state law, implied warranties, such as the promise that a product does what it is supposed to do, cover most purchases unless the seller properly disclaims them. The FTC suggests contacting a lawyer or your state consumer protection office for questions about implied warranty coverage in your state.

Questions to ask before you sign

Can I see the full written warranty, not a summary?
What does each part's coverage include: parts, labor, or both?
Who honors it: the manufacturer, the installer, or both?
What do I need to do to keep it valid: registration, maintenance, records?
Does it transfer if I sell the home?
What is excluded, and what counts as maintenance?
How is a claim filed, and how long does service usually take?

Ask Jorge for the written warranty for the exact Living Water system he recommends; it comes with your itemized quote after the free test. See also how to compare quotes.

Sources:
https://consumer.ftc.gov/articles/warranties
https://www.ftc.gov/business-guidance/resources/businesspersons-guide-federal-warranty-law
https://info.nsf.org/Certified/DWTU/

Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist