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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Countertop water unit filling a glass carafe beside a glass of water
Latest Article

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.

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Latest Articles

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
Y-style water screen filter with its stainless steel mesh screen removed on a garden bench
Filters

How to Choose a Water Screen Filter: Types, Mesh Sizes and Costs

A water screen filter traps sand before it clogs your drip line, pump or plumbing. Compare 4 types, pick the right mesh size and see prices from $12.05.

Tim Rhodes•Oct 26, 2026•8 min read
Water softener mineral tank, brine tank and carbon filter tank plumbed together in a home basement
Filters

Water Treatment Tank Basics: Types, Sizes, Prices and Replacement

Which water treatment tank do you need? Compare mineral, brine, RO and retention tanks, read a 10 x 54 size, see real listed prices and swap one yourself.

Tim Rhodes•Oct 26, 2026•17 min read
A slim 10 inch filter housing next to a wider Big Blue 10 inch housing on a garage workbench
Filters

10 Inch Water Filter Housings: How to Pick the Right Size and Fit

Slim or Big Blue? See which 10 inch water filter housing fits your cartridge, pipes and water pressure, what comes in the box, and real prices from $13.95.

Tim Rhodes•Oct 25, 2026•11 min read
Tank water heater in a basement utility corner with copper pipes and a gas line
Heaters

How Long for a Hot Water Heater to Heat Up? Times by Type and Size

How long for hot water heater to heat up? Gas tanks take 30 to 40 minutes, electric 60 to 90. See times by size, after a shower and when slow means trouble.

Tim Rhodes•Oct 21, 2026•6 min read
Tape measure held beside a standard 16.9 oz plastic water bottle to show its height
Bottles

How Tall Is a Water Bottle? Heights for Every Size, 8 to 40 oz

How tall is a water bottle? A standard 16.9 oz bottle is about 8 inches (20.3 cm). Get real heights for 8 to 40 oz bottles, widths and how to measure yours.

Tim Rhodes•Oct 21, 2026•8 min read