Expert Water Filter, Softener & Heater Reviews

In-depth reviews and buying guides for water treatment systems. We do the research so you can skip the guesswork.

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Slim chrome inline shower filter installed between a shower arm and a shower head
Latest Article

5 Best Sprite Water Filters for Showers, Handhelds and Tubs

We ranked 5 Sprite water filters for fixed showers, handheld wands and tubs, with the cartridge each one takes, its rated life and its NSF/ANSI 177 status.

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Latest Articles

Slim chrome inline shower filter installed between a shower arm and a shower head
Filters

5 Best Sprite Water Filters for Showers, Handhelds and Tubs

We ranked 5 Sprite water filters for fixed showers, handheld wands and tubs, with the cartridge each one takes, its rated life and its NSF/ANSI 177 status.

Tim Rhodes•Nov 13, 2026•16 min read
Pouring filtered water from a pitcher filter into a glass on a kitchen counter
Filters

What Is Filtered Water? 7 Ways Tap Water Gets Filtered at Home

Filtered water is tap or well water run through a filter that cuts specific impurities. See the 7 filter types, what each removes and how it compares with purified and distilled water.

Tim Rhodes•Nov 13, 2026•13 min read
Kitchen sink with a separate point of use filter faucet next to the main tap
Filters

Point of Use Water Filter Types, Costs and How to Pick One

A point of use water filter cleans water at one tap. See the 5 types, what each removes, what reverse osmosis costs and wastes, and how to pick yours.

Tim Rhodes•Nov 11, 2026•5 min read
Several water filter cartridges of different types and sizes lined up on a counter
Filters

10 Water Filter Cartridge Types, in the Order Water Meets Them

The 10 water filter cartridge types, from sediment and carbon to KDF, resin and RO membranes, with what each removes, what it misses and which size fits your housing.

Tim Rhodes•Nov 10, 2026•12 min read
Whole house water filter system with leak being repaired
Filters

Whole House Water Filter Leaking From Top? Find the Spot, Then Fix It

A whole house water filter leaking from the top leaks at the sump seal, the red pressure relief button or a pipe fitting. Here's how to find which one and fix it.

Tim Rhodes•Nov 10, 2026•20 min read
Countertop water unit filling a glass carafe beside a glass of water
Filters

7 Best Budget Water Filters, Picked by What They're Certified to Do

Compare 7 budget water filters by certification and filter life, from a Brita Elite pitcher that cuts 99% of lead to an NSF/ANSI 58 under-sink RO system.

Tim Rhodes•Nov 9, 2026•16 min read
Watts water filter systems compared for home drinking and whole-house water
Filters

5 Best Watts Water Filters for Every Job in Your Home

Five Watts water filters compared by job: under-sink RO, no-power ultrafiltration, salt-free scale control and whole-house sediment cartridges.

Tim Rhodes•Nov 9, 2026•4 min read
Inline water filter being connected to a refrigerator water line behind the fridge
Filters

Best External Water Filter for Refrigerator Lines: 7 Inline Picks

The best external water filter for refrigerator lines depends on your line. See 7 inline picks ranked by NSF certification, from 6-month to 5-year filters.

Tim Rhodes•Nov 4, 2026•7 min read
Compact electric point-of-use water heater mounted inside an open kitchen sink cabinet
Heaters

Are Point of Use Water Heaters Efficient? What the Numbers Show

Are point of use water heaters efficient? Yes, at remote, low-flow fixtures. See DOE figures, running costs, shower sizing math and when a heat pump wins.

Tim Rhodes•Nov 3, 2026•15 min read
Flat-plate solar water heater collectors and storage tank on a sunny house roof
Heaters

Are Solar Water Heaters Worth It? Costs, Savings and Payback Math

Are solar water heaters worth it? See installed costs of $2,500-$9,000, yearly savings, payback math, the expired tax credit and when a heat pump wins.

Tim Rhodes•Nov 3, 2026•7 min read
Refrigerator door water dispenser pouring water into a clear glass in a home kitchen
Filters

The Real Dangers of Not Changing Your Refrigerator Water Filter

Dangers of not changing a refrigerator water filter, sorted: weaker filtering, odd taste and hollow ice are real. The scary health claims? Mostly unproven.

Tim Rhodes•Oct 29, 2026•15 min read
Battery backup box mounted next to a gas tankless water heater on a garage wall
Heaters

5 Best Battery Backups for a Tankless Water Heater (Gas and Propane)

Battery backups for tankless water heater outages, ranked: HUGO vs plug-in UPS vs power station, with Rinnai runtimes, sizing math and setup steps.

Tim Rhodes•Oct 28, 2026•26 min read
Open bulk sack of granular activated charcoal with a scoop on a garage workbench
Filters

Bulk Activated Charcoal: How to Pick the Right Type and Where to Buy

Buying bulk activated charcoal? Match the form, base and mesh to your water filter, odor box or fish tank, compare price per pound and find the right supplier.

Tim Rhodes•Oct 28, 2026•12 min read
Saltwater aquarium on a stand with the cabinet open to show a canister filter and its hoses
Filters

Salt Water Canister Filter: How to Run One Without Nitrate Trouble

A salt water canister filter works if you swap the floss every few days. Get the media order, cleaning routine and the right model size for your tank.

Tim Rhodes•Oct 28, 2026•11 min read
Submersible aquarium heater mounted on the back glass of a planted freshwater tank
Heaters

7 Best Aquarium Heaters for Every Tank Size and Water Type

Compare 7 aquarium heaters by tank size, safety cut-offs and material, from a 10-watt betta heater to a 400-watt titanium heater for saltwater reefs.

Tim Rhodes•Oct 26, 2026•13 min read