May 20 , 2026
Everpure H-300 Replacement Cartridge (EV9270-71): 2026 Buyer's and Install Guide
Everpure H-300 Replacement Cartridge (EV9270-71): 2026 Buyer's and Install Guide
The Everpure H-300 is one of the most widely used point-of-use water filtration cartridges in homes and small foodservice setups across the country. If you own a system that uses it, you already know the routine. Every six months or 300 gallons, whichever comes first, that cartridge needs a fresh swap. The hard part is usually finding the right replacement at the right price, in stock, and on the way before the weekend.
This guide covers exactly what you need to know to replace your Everpure H-300 cartridge correctly in 2026. We cover specs, OEM part numbers, what the filter actually removes, when to replace it, how to install it in under five minutes, and where to buy authentic cartridges with same-day shipping.
What Is the Everpure H-300?
The Everpure H-300 is a quick-change point-of-use water filtration cartridge manufactured by Pentair. It is one of Everpure's most popular residential and light-commercial cartridges. You will see it installed under kitchen sinks, behind ice makers, and in coffee and espresso setups where consistent water quality matters.
The OEM part number is EV9270-71. If you see "Pentair Everpure H-300" or "Everpure H300" listed elsewhere, those are all the same cartridge.
The H-300 is a sediment, taste, and odor cartridge with NSF certification. It is engineered to fit Everpure's H-300 head assembly using a twist-on, twist-off connection. No tools required for the cartridge swap. The system head stays mounted to your cabinet or wall, and only the cartridge changes.
Quick Specs
| Spec | Value |
|---|---|
| OEM part number | EV9270-71 |
| Capacity | 300 gallons |
| Flow rate | 0.5 gallons per minute |
| Micron rating | 0.5 micron nominal |
| Pressure range | 10 to 125 psi |
| Temperature range | 35 F to 100 F |
| Replacement interval | 6 months or 300 gallons |
| Connection | Twist-on quick-change |
| Certifications | NSF/ANSI 42 and 53 |
What the Everpure H-300 Removes
The H-300 cartridge is built for taste, odor, and particulate reduction. It is not a reverse osmosis cartridge and does not remove dissolved minerals or salts. What it does well is take municipal tap water and produce noticeably cleaner, better-tasting water at the tap.
The cartridge reduces:
- Chlorine taste and odor
- Particulates down to 0.5 micron (sand, sediment, rust flakes)
- Cysts including Cryptosporidium and Giardia
- Mold, algae, and other microscopic organic matter
- Lead reduction per NSF/ANSI 53
The H-300 does not soften water. If your home has hard water and you want scale prevention, the H-300 should be paired with a separate softening solution rather than relied on alone.
When to Replace the H-300
The replacement interval is 6 months from the install date or 300 gallons of filtered water, whichever comes first. Most residential households hit the 6-month mark well before the 300-gallon limit.
Signs your H-300 is past due:
- Reduced flow. If your filtered water comes out noticeably slower than it used to, the cartridge is loading up with sediment.
- Returning taste or odor. The chlorine taste you stopped noticing is back. That means the carbon block is exhausted.
- Date on the cartridge label. Most installers write the install date on the cartridge body with a marker. If yours says October 2025, it is past due.
- System bypass indicator. Some H-300 head assemblies have a built-in indicator that changes color or shows a flag when replacement is due.
Running an exhausted cartridge will not damage the system. It just stops doing its job. Old cartridges can also become a growth surface for bacteria over time, which defeats the purpose of having a filter in the first place.
How to Install a Replacement H-300 Cartridge
The H-300 uses Everpure's quick-change design. The full swap takes under five minutes. No tools required.
- Turn off the water supply to the H-300 head. Most installations have a dedicated shut-off valve on the cold line going into the head. Turn it perpendicular to the line to close it.
- Open the faucet that the filter feeds (or run the ice maker briefly) to release pressure in the cartridge.
- Rotate the old cartridge a quarter turn counter-clockwise. The cartridge will release from the head.
- Pull the old cartridge straight down and set it aside. Expect a small amount of water to drain out. A towel under the head catches most of it.
- Take the new cartridge out of the packaging and remove the protective cap from the top. Inspect the O-ring on the cartridge for any debris.
- Align the new cartridge with the head, push it up into position, and rotate clockwise a quarter turn until it stops. You will feel it seat.
- Open the water supply valve slowly. Watch for leaks at the head connection. A small drip on first start-up usually self-seals as the cartridge fully seats.
- Flush the new cartridge by running 2 to 3 gallons of water through the connected fixture. This clears any carbon fines from the new cartridge and sets the carbon block. Discard this water.
- Write the install date on the cartridge body with a permanent marker. Six months from today is your next replacement date.
Total time: about four minutes once you have the new cartridge in hand.
Compatible Systems
The H-300 cartridge fits any Everpure system head designed for the H-300. If you are replacing a cartridge that came with your system, you are in the right place. Common applications include:
- Everpure H-300 residential point-of-use systems
- Light-commercial coffee and espresso machines
- Ice maker filtration on built-in residential ice machines
- Single-faucet drinking water installations
The H-300 will not fit an H-104, H-1200, or any non-Everpure head. The cartridge connection is keyed specifically to the H-300 head assembly. If you are unsure which Everpure cartridge your system uses, the safest move is to look at the cartridge currently installed and read the part number on the label.
How the H-300 Compares to Other Everpure Cartridges
If you are deciding between cartridges for a new install, this is the quick differentiator:
| Cartridge | Capacity | Best For |
|---|---|---|
| H-300 (EV9270-71) | 300 gal | Standard residential, single-tap drinking water |
| H-104 (EV9612-11) | 1,000 gal | Higher-volume residential, light commercial |
| H-1200 (EV9282-00) | 1,500 gal | Whole-kitchen or multi-tap residential |
| H-54 (EV9252-67) | 750 gal | Mid-volume residential, scale reduction option |
The H-300 is the most popular choice for single-faucet under-sink installs in normal residential use. If your household goes through more water than that or you are filtering for multiple fixtures, stepping up to an H-104 or H-1200 makes sense at the next system overhaul.
Counterfeit and Aftermarket H-300 Cartridges
Pentair manufactures the genuine Everpure H-300 cartridge. Several aftermarket brands sell cartridges that claim to fit Everpure H-300 heads. A few cautions before you buy a non-OEM version:
- NSF certification. Most aftermarket cartridges are not NSF-certified to the same standards. The certification is what backs the contaminant reduction claims.
- O-ring fit. Aftermarket cartridges sometimes have slightly different O-ring dimensions. A loose seal causes leaks at the head connection.
- Carbon density. The carbon block in the genuine cartridge is matched to the H-300's flow rate. Off-spec carbon can result in early breakthrough or restricted flow.
If price is the main driver, the right move is to buy genuine Pentair Everpure cartridges in a 2- or 3-pack to lower your per-cartridge cost. The savings from aftermarket cartridges almost always disappear once you factor in shorter life, weaker filtration, or a service call to fix a leak.
Where to Buy an Authentic Everpure H-300
The genuine Pentair Everpure H-300 cartridge (EV9270-71) is available at Water Filters FAST with same-day shipping on weekday orders placed before 1pm CST. Orders over $75 ship free. Smaller orders ship for a flat $5.
We carry the H-300 as a single cartridge, in 2-packs, and in 3-packs for households that want to keep a spare on hand or stretch the per-cartridge cost. Every cartridge is genuine Pentair manufacture, NSF-certified, and backed by our 30-day satisfaction guarantee.
If you have questions about whether the H-300 is the right cartridge for your system, our support team can verify compatibility before you order. Call 855-789-FAST (855-789-3278) or email support@waterfiltersfast.com.
Frequently Asked Questions
How long does an Everpure H-300 last?
Six months or 300 gallons of filtered water, whichever comes first. Most residential homes replace at the 6-month mark.
What is the OEM part number for the Everpure H-300?
EV9270-71. You may also see it listed as Pentair Everpure H-300 or Everpure EV9270-71.
Does the H-300 remove fluoride?
No. The H-300 reduces chlorine taste and odor, particulates, cysts, and lead. Fluoride removal requires a reverse osmosis system.
Can I install the H-300 myself?
Yes. The cartridge is a quick-change design that requires no tools. The full swap takes under five minutes.
What happens if I do not replace the H-300 on schedule?
The cartridge stops filtering effectively. Taste and odor return, flow slows, and the cartridge can become a surface for bacterial growth. There is no damage to the system itself.
Is the H-300 the same as the H-300NXT?
The H-300 and H-300NXT are different cartridges with different connection types. Verify your system's exact model before ordering.
Where is the Everpure H-300 made?
Pentair manufactures the H-300. Pentair is a US-based water treatment company headquartered in Minneapolis, Minnesota.
Ready to replace your H-300? Order the genuine Pentair Everpure H-300 cartridge (EV9270-71) with same-day shipping on weekday orders before 1pm CST. Free shipping over $75. Questions on compatibility, call 855-789-FAST.
