Which filter delivers the best cost-per-gallon for long-term savings and clean water?
We offer the Waterdrop RF17-UF, which filters 24,000 gallons affordably, removes lead and chlorine, and installs easily for worry-free, crystal-clear water.
Tired of high water costs? Find the best cost-per-gallon filter to save money and sip clean water worry-free.
Waterdrop RF17-UF leads with 24,000 gallons per filter. It cuts lead, chlorine, and odors. Easy install means pure water in seconds.
This guide is NSF-certified and tested. You’ll get crystal-clear water for years. Trust the top pick—read on to see why it wins.
List of Top 10 Cost-Per-Gallon Filter
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SimPure V7 Replacement Filter, 20K Gallons High Capacity, Replacement for SimPure V7 Under Sink Water Filtration System (1 Pack) |
This filter is perfect for people who need clean water at home, in a rental, or in an RV. It runs fast, lasts long, and saves money. |
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Aqua Flo Platinum QCRO RO Filter Replacement Kit – Improves Taste by Reducing Chlorine & Odors, Cost-Effective Filtration, Membrane Sold Separately |
This kit is perfect for families who want clean drinking water at home. It is also great for renters who need an easy, low‑cost way to improve water taste and remove chlorine and odors. |
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Waterdrop RF10-MZ Replacement Filter Cartridge For 10UB-MZ/10UA/10UB Under Sink Water Filter, 8K Gallons High Capacity |
This product is perfect for homeowners seeking clean, mineral-rich water without frequent replacements. With an 8,000-gallon capacity, it offers reduced chlorine, essential minerals like calcium and potassium, and fits Waterdrop UA, UB, UC series for easy, tool-free installation. |
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Aquasana Under Sink Water Filter | 3-Stage Max Flow Filtration | Reduces up to 99.99% of 78 Contaminants – PFAS, Lead, Chlorine, Cysts, & More | Under Counter Drinking Water Filter | AQ-6300M-NF |
The Aquasana Under Sink Water Filter is perfect for anyone who wants clean, safe drinking water at home. It’s great for families, busy cooks, or anyone who wants fast, filtered water without waiting. |
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Invigorated Water PH001 – White Alkaline Water Filter – Replacement Filters For all Water Pitcher & Dispenser Filtration Systems – BPA-Free, Removes Chlorine, Heavy Metals – 96 Gallons/Filter (1-Pack) |
This alkaline water filter is perfect for anyone who wants clean, healthy water. It’s great for families or busy people who care about saving money and protecting the planet. |
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LCF Alkaline Countertop Water Filter, 𝐒𝐢𝐥𝐯𝐞𝐫 𝐈𝐨𝐧𝐬 Enhanced 6-Stage Stainless Steel Water Filter for Sink Faucet, Reduces Heavy Metals, Bad Taste & 99% Chlorine, 16,000 Gallons(2 Filters) |
This LCF Alkaline Countertop Water Filter is perfect for anyone who wants clean, fresh water at home. It’s easy to install and works great in homes, rentals, or RVs. |
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Waterdrop 15UC-UF 0.01μm Inline Water Filter for Refrigerator, 19K Gallons, In Line Water Filter for Icemaker, Idea for Ice Maker, RV, Refrigerator, 1/4 inch Direct Connect, NSF/ANSI 42 Certified |
This filter is perfect for homeowners and RV owners who want clean, great-tasting ice and water straight from their fridge—without the high cost or hassle. |
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PH001 Ultra – NSF Certified Alkaline Water Filter – Replacement Filters for Invigorated Water Pitcher Systems – BPA-Free, Removes Chlorine, Heavy Metals – 96 Gallons/Filter (White, 3-Pack) |
This PH001 Ultra alkaline water filter is great for families who want clean water at home. It works well for anyone who drinks lots of water, loves the earth, and wants BPA‑free, chlorine‑removing, heavy‑metal‑free performance. |
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Waterdrop RF17-UF 0.01 Micron Water Filter, 24K Gallons High Capacity, Reduces Lead, Chlorine, Bad Taste & Odor, Replacement for Waterdrop Under Sink Water Filtration system |
This filter is perfect for families who want clean, safe water at home. It gives 0.01 micron filtration, removes lead and chlorine, and lasts 24 K gallons. |
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Epic Everywhere Bottle Filter Complete | 1-Pack | 75 Gallon Total Filter Life | 3-4 month Supply | Compatible with all Epic Water Bottles | Replaces Everyday and Outdoor (Cartridge Double) |
Perfect for outdoor enthusiasts and eco-conscious users who want clean water anywhere. CoreXchange Technology removes 99.99% of contaminants from tap or streams, lasting 75 gallons with zero plastic waste. |
Detailed Reviews
Discover the top 10 Cost-Per-Gallon Filters, handpicked for value and performance. Each filter is expert-reviewed and backed by customer feedback, ensuring you get the best bang for your buck. Whether you prioritize affordability or quality, this guide has you covered. Dive in to find the perfect filter that saves you money and delivers clean, great-tasting water every day.
1. SimPure V7 Replacement Filter, 20K Gallons High Capacity, Replacement for SimPure V7 Under Sink Water Filtration System (1 Pack)
Stop buying bottled water. The SimPure V7 Replacement Filter gives your family clean, great-tasting water straight from the tap—no more plastic jugs or wasted money. One filter lasts up to 20,000 gallons or 12 months. That’s peace of mind and real savings you can taste.
It fits perfectly in your SimPure V7 Under Sink System and delivers 1.6 gallons per minute—fast enough for cooking, filling pitchers, or daily drinking. Just twist it in and enjoy pure water on demand.
Made in Seattle, USA since 2006. We stand behind every filter with real support—call our water specialists anytime. Satisfaction guaranteed or we make it right. Trust the filter designed for life’s daily needs.
| Pros | Cons |
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Perfect For:
This filter is perfect for people who need clean water at home, in a rental, or in an RV. It runs fast, lasts long, and saves money.
Ready to Purchase?
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2. Aqua Flo Platinum QCRO RO Filter Replacement Kit – Improves Taste by Reducing Chlorine & Odors, Cost-Effective Filtration, Membrane Sold Separately
The Aqua Flo Platinum QCRO kit includes a Filter Kit of three filters. The RO Membrane sold separately.
It removes bad taste and odor. The water tastes fresh. Improved Taste means better drinking water.
Easy Installation lets you change filters fast. Cost Efficiency saves money and cuts waste. Quality Materials keep water pure.
| Pros | Cons |
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Perfect For:
This kit is perfect for families who want clean drinking water at home. It is also great for renters who need an easy, low‑cost way to improve water taste and remove chlorine and odors.
Ready to Purchase?
3. Waterdrop RF10-MZ Replacement Filter Cartridge For 10UB-MZ/10UA/10UB Under Sink Water Filter, 8K Gallons High Capacity
The Waterdrop RF10-MZ Replacement Filter is a high-capacity solution for your under-sink water system. It filters up to 8,000 gallons of water, ensuring long-lasting use. This filter is easy to install and replace, saving you time and effort.
It adds essential minerals like calcium and magnesium to your water, making it healthier to drink. The advanced mineralization technology ensures a perfect balance of microelements for better health.
The fast flow rate provides pure, fresh water quickly. It’s compatible with multiple Waterdrop models, making it a versatile choice for your home or office.
| Pros | Cons |
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Perfect For:
This product is perfect for homeowners seeking clean, mineral-rich water without frequent replacements. With an 8,000-gallon capacity, it offers reduced chlorine, essential minerals like calcium and potassium, and fits Waterdrop UA, UB, UC series for easy, tool-free installation.
Ready to Purchase?
4. Aquasana Under Sink Water Filter | 3-Stage Max Flow Filtration | Reduces up to 99.99% of 78 Contaminants – PFAS, Lead, Chlorine, Cysts, & More | Under Counter Drinking Water Filter | AQ-6300M-NF
The Aquasana AQ-6300M-NF removes 99.99% of 78+ contaminants, including PFAS, lead, and chlorine, while keeping healthy minerals. It delivers fast 0.72 GPM flow, 7x quicker than pitcher filters. This system is cost-effective, costing less than 10 cents per gallon.
Easy DIY installation includes all parts and support for setup. Simple twist-off filter replacement lasts 6 months or 800 gallons, replacing 6,000 plastic bottles.
| Pros | Cons |
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Perfect For:
The Aquasana Under Sink Water Filter is perfect for anyone who wants clean, safe drinking water at home. It’s great for families, busy cooks, or anyone who wants fast, filtered water without waiting.
Ready to Purchase?
5. Invigorated Water PH001 – White Alkaline Water Filter – Replacement Filters For all Water Pitcher & Dispenser Filtration Systems – BPA-Free, Removes Chlorine, Heavy Metals – 96 Gallons/Filter (1-Pack)
Experience pure, refreshing water with the Invigorated Water PH001 filter. This white alkaline water filter is designed to fit all water pitcher and dispenser systems. It’s BPA-free and effectively removes chlorine and heavy metals.
This filter features a multi-stage system with two micronets. It also uses US-made coconut shell activated charcoal and a KDF filter to purify your water.
Enjoy health-promoting minerals in every sip. The filter improves taste and smell, and its long life of 96 gallons per filter makes it a smart choice for your home.
| Pros | Cons |
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Perfect For:
This alkaline water filter is perfect for anyone who wants clean, healthy water. It’s great for families or busy people who care about saving money and protecting the planet.
Ready to Purchase?
6. LCF Alkaline Countertop Water Filter, 𝐒𝐢𝐥𝐯𝐞𝐫 𝐈𝐨𝐧𝐬 Enhanced 6-Stage Stainless Steel Water Filter for Sink Faucet, Reduces Heavy Metals, Bad Taste & 99% Chlorine, 16,000 Gallons(2 Filters)
Ready for pure, fresh water right from your tap? The LCF Alkaline Countertop Water Filter is here. This sleek, stainless steel system looks great in any kitchen. It’s easy to install and even easier to enjoy.
The 6-stage filtration includes silver ions for extra cleanliness. It removes heavy metals, chlorine, and bad tastes.
Get cleaner, better-tasting water today. Save money and help the planet. The LCF filter is the smart, simple choice for your home.
| Pros | Cons |
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Perfect For:
This LCF Alkaline Countertop Water Filter is perfect for anyone who wants clean, fresh water at home. It’s easy to install and works great in homes, rentals, or RVs.
Ready to Purchase?
7. Waterdrop 15UC-UF 0.01μm Inline Water Filter for Refrigerator, 19K Gallons, In Line Water Filter for Icemaker, Idea for Ice Maker, RV, Refrigerator, 1/4 inch Direct Connect, NSF/ANSI 42 Certified
Waterdrop 15UC-UF is an inline water filter for refrigerators, ice makers, and RVs. It uses a 0.01-micron ultrafiltration membrane to remove chlorine, heavy metals, and bad tastes. This filter saves over 50% on replacements and provides 0.75 gallons per minute flow rate.
It installs in 3 minutes with 1/4″ PE tubing and lasts up to 19,000 gallons. Certified by NSF/ANSI 42 and 53, it ensures clean water by reducing lead, odors, and other impurities.
| Pros | Cons |
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Perfect For:
This filter is perfect for homeowners and RV owners who want clean, great-tasting ice and water straight from their fridge—without the high cost or hassle.
If you’re tired of expensive brand-name filters that clog or run out fast, the Waterdrop 15UC-UF gives you reliable filtration, easy DIY install, and big savings with every twist-and-lock replacement.
Ready to Purchase?
8. PH001 Ultra – NSF Certified Alkaline Water Filter – Replacement Filters for Invigorated Water Pitcher Systems – BPA-Free, Removes Chlorine, Heavy Metals – 96 Gallons/Filter (White, 3-Pack)
PH001 Ultra is an NSF‑certified alkaline water filter. It makes 96 gallons of clean water per filter.
It uses premium coconut shell charcoal for better cleaning. The filter adds trace minerals and raises water pH. It is BPA‑free and helps cut plastic waste.
| Pros | Cons |
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Perfect For:
This PH001 Ultra alkaline water filter is great for families who want clean water at home. It works well for anyone who drinks lots of water, loves the earth, and wants BPA‑free, chlorine‑removing, heavy‑metal‑free performance.
Ready to Purchase?
9. Waterdrop RF17-UF 0.01 Micron Water Filter, 24K Gallons High Capacity, Reduces Lead, Chlorine, Bad Taste & Odor, Replacement for Waterdrop Under Sink Water Filtration system
Say goodbye to bottled water and hello to crystal-clear hydration with the Waterdrop RF17-UF filter! This powerhouse is designed to fit your Waterdrop undersink system, bringing you pure, delicious water right from your tap.
Experience incredible longevity with a filter that lasts up to 3 years or 24,000 gallons! Its innovative multistage filtration tackles lead, chlorine, bad taste, and odor, ensuring every sip is refreshing and safe.
It’s easy to install. Enjoy clean water instantly. Upgrade your home today!
| Pros | Cons |
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Perfect For:
This filter is perfect for families who want clean, safe water at home. It gives 0.01 micron filtration, removes lead and chlorine, and lasts 24 K gallons.
Ready to Purchase?
10. Epic Everywhere Bottle Filter Complete | 1-Pack | 75 Gallon Total Filter Life | 3-4 month Supply | Compatible with all Epic Water Bottles | Replaces Everyday and Outdoor (Cartridge Double)
Quench your thirst with the Epic Everywhere Filter! It’s your trusty sidekick for fresh, clean water anywhere you go.
This filter replaces both our Everyday and Outdoor filters. It removes nasty stuff from your water. Drink clean and easily!
| Pros | Cons |
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Perfect For:
Perfect for outdoor enthusiasts and eco-conscious users who want clean water anywhere. CoreXchange Technology removes 99.99% of contaminants from tap or streams, lasting 75 gallons with zero plastic waste.
Ready to Purchase?
Buying Guide
Tired of spending too much on water? A cost-per-gallon filter can save you money and time.
People love having clean water without the high cost of bottled water. These filters make it easy to enjoy great-tasting water straight from your tap.
Here’s what to think about when choosing a cost-effective water filter:
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Filter Life: A filter’s lifespan matters the most. Longer-lasting filters lower the cost per gallon.
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Filter Capacity: Check how many gallons a filter can handle. More gallons usually mean better value.
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Contaminant Removal: See what the filter removes from your water. Make sure it gets rid of things like lead, chlorine, and bad odors.
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Flow Rate: How fast does the water come out? Make sure the flow rate is fast enough for your needs.
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Installation: Is the filter easy to put in? Simple install saves time and fuss.
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Certifications: Look for NSF certifications. This shows the filter is tested and meets safety standards.
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Filter Type: Consider the filter type that suits you the most: under sink, countertop, water pitcher. Make sure the filter type can address your requirements.
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Cost of Replacement: The price of replacement filter is important. Remember to compare prices before deciding.