The Everpure EV927076 (H-300) Drinking Water System is a residential under-sink system that filters tap water at a dedicated drinking faucet. It is for homes that want less chlorine taste and odor, lead, and cysts in their drinking water.
This Everpure EV927076 System Installation guide covers first-time installation, which takes an estimated 15–30 minutes. For later cartridge changes, see our Everpure EV927072 (H-300) Filter Replacement Guide.
Safety & Preparation
Before starting the Everpure H-300 Drinking Water System installation, choose the mounting spot, check your supply against the limits below, and gather the parts and tools listed.
Choose the Mounting Location
The head and cartridge mount vertically, with the cartridge hanging down. The system measures 3.5" W x 17.1" H x 4.25" D, and the space required is 5" W x 22" H x 5" D, which includes 2-1/2 inches of clear space below the unit for cartridge changes. Measure 22 inches up from the base of the cabinet and mark where the top of the filter head will sit. Leave room above the head to open and close the built-in shut-off handle and to avoid kinking the tubing, and pick a spot that is easy to reach for future cartridge changes.
H-300 System Dimensions
🔍 Before you start: the system is for cold water use only, at 35–100°F (2–38°C), with a supply pressure of 10–125 psi (0.7–8.6 bar), non-shock. Filtered water comes from a dedicated drinking water faucet, which is not included with the system and is installed separately from your kitchen faucet.
Have Everything Ready
Everpure EV927076 Installation Kit
🧰 Materials
Included with the system:
You will also need:
⚠️ Safety Precautions
Step-by-Step Installation
Common Installation Mistakes
These are the mistakes most likely to cause trouble in an Everpure EV927076 system installation, each with its fix. Where another section covers the requirement, the link points back to it:
Copper tubing can look like it fits the John Guest fittings, but leaks develop over time. Use the supplied poly tubing. If copper is required, use copper compression fittings instead, as noted in Safety & Preparation.
The H-300 uses the EV927072. The manual lists different cartridge part numbers for the other H-series models, so confirm the part number before installing any cartridge. The replacement details are in When to Replace Your Filter Cartridge.
The manual calls for hand-tightening only, so do not use a wrench on the elbows. If a connection leaks, recheck the plumber's tape and how the fitting is seated before adding force. See Step-by-Step Installation.
Tubing that is cut at an angle, or not pushed all the way into its quick-connect fitting, can leak or pull loose. Cut the end square with a sharp knife, push it fully in, and pull gently to confirm it is held.
Plumber tape goes on the elbow fitting threads only. The manual says it should not be required for the tubing connections or the faucet connector, so disconnect any taped connection and reconnect it without tape.
The inlet elbow goes on the left side of the head. The outlet elbow, with the black band and restrictor, goes on the right. If they are reversed, remove and refit them as described in Step-by-Step Installation.
The head and cartridge must hang vertically. Too little room above the head blocks the shut-off handle and pinches the tubing, and too little room below makes the cartridge hard to remove later. If the layout is wrong, remount the head or reroute the tubing before connecting water. The space requirements are in Safety & Preparation.
If the lug is not aligned with the label on the head, or the cartridge is not turned until rotation stops, it is not locked in. Realign the lug, push the cartridge upward, and turn it to the right about a quarter turn.
Little or no flow usually means the angle stop valve or the side valve on the adaptor was not reopened, or the shut-off handle was not lowered. Reopen the valves and lower the handle, following the steps in Step-by-Step Installation. If flow is still low, see Troubleshooting & FAQ.
What to Expect After Installation
A new cartridge needs to be flushed at full flow for at least 3 minutes to purge trapped air and loose carbon, as described in step 6 of Step-by-Step Installation. Water can look cloudy or sputter at first because of air in the filter and tubing. This clears with flushing and use, and cloudiness that lasts more than a week is outside what the manual describes as normal.
Once the system is under pressure, check every connection again for drips: the angle stop valve adaptor, both elbow fittings, and both ends of each tubing run. Then compare what you see against the two columns below:
✅ Ready for Use
🔎 Worth a Second Look
If anything lands in the right-hand column, see Troubleshooting & FAQ. For when the first cartridge change is due, see When to Replace Your Filter Cartridge.
Official Product Resources
The H-300 spec sheet covers the system's ratings, dimensions, and certifications. The manufacturer's H-Series owner's manual has the full installation instructions, the tools and parts lists, and the performance data sheets. The manual covers several H-Series models, so use the H-300 entries.
When to Replace Your Filter Cartridge
Replace the cartridge as soon as any one of these three limits is reached, whichever comes first:
The cartridge's rated capacity (1,135 L).
Replace the cartridge once flow at the faucet slows too far to be convenient.
Even if the first two limits haven't been reached, replace the cartridge once a year at the latest.
The replacement for this system is the Everpure EV927072, the H-300 cartridge. It is sold as a single cartridge and as the EV927071 6-pack. To stay on schedule without tracking dates, the 12-month filter subscription for the EV927072 is a set-it-and-forget-it option, with your annual replacement delivered automatically.
How to Maximize the Lifespan of Your Filter
A few routine habits keep the system running as installed and the cartridge changes on time:
- Stay within the operating limits — the water type, temperature, and pressure ranges are in Safety & Preparation.
- Keep the area under the sink clear — so the cartridge, the built-in shut-off handle, and the space below the unit stay easy to reach.
- Check the fittings and tubing now and then — look for drips at the connections and for tubing that has been bent or pinched, and fix either one right away.
- Keep tubing runs short — the spec sheet advises using the minimum length of tubing possible.
- Wipe the exterior with a mild cleaner — use a mild, non-abrasive cleaner on the outside surfaces only.
- Record the install date — and schedule the next replacement by the interval in When to Replace Your Filter Cartridge.
Troubleshooting & FAQ
How long does the Everpure H-300 Drinking Water System installation take?
The estimated install time is 15 to 30 minutes. The steps are in Step-by-Step Installation.
Does the system need a separate faucet?
Yes. Filtered water is dispensed from a dedicated drinking water faucet, installed separately from your kitchen faucet. The faucet is not included with the system and must be purchased separately.
A connection or the head is leaking — what should I check?
Recheck the plumber's tape on the elbow fitting threads and confirm the fittings are hand-tightened only. Make sure each tube is pushed fully into its quick-connect fitting, and that the cartridge is turned about a quarter turn to the right until rotation stops. The connection steps are in Step-by-Step Installation.
Water flow is low after installation.
Confirm the cold water angle stop valve and the side valve on the adaptor are fully open and the shut-off handle on the head is lowered. Check that the tubing is not kinked. If the cause is still unclear, the layout points in Common Installation Mistakes are the next place to look.
Why is the water cloudy or sputtering after installation?
Trapped air in the filter and tubing causes early cloudiness and sputtering, and it clears as the new cartridge is flushed and used. Cloudiness lasting more than a week is outside what the manual describes as normal. The flush is covered in What to Expect After Installation.
Can the system supply a refrigerator or other appliances?
Yes, within limits. The manual describes adding connection tees in the water line between the filter and the faucet adaptor to feed a refrigerator, an instant hot water dispenser or chiller, or a plumbed-in coffee brewer. A home ice maker with no filter faucet connection under the sink needs a flush valve, and the system must never be connected to a commercial ice maker.
What does the system reduce?
It is certified to NSF/ANSI Standards 42 and 53. Claims include chlorine taste and odor, lead, and cysts such as Cryptosporidium and Giardia, with cyst reduction by mechanical means, and the full list is on the H-300 performance data sheet in the manual, linked in Official Product Resources. It is not for use on water that is microbiologically unsafe or of unknown quality without disinfection before or after the system.
When is the first cartridge change due?
Replace every 300 Gallons or at least once a year. Refer to the When to Replace Your Filter Cartridge.
Product & Replacement Options
Options for stocking up and for ongoing H-300 system needs are below, including a multi-system pack and open-box cartridge listings:
Six H-300 drinking water systems sold together in one listing.
View Product →The H-300 replacement cartridge, listed as a single open-box unit. Timing is covered in When to Replace Your Filter Cartridge.
View Product →Six H-300 replacement cartridges in an open-box listing, so future changes are on hand.
View Product →Never Run Out of Replacement Cartridges
Subscribe to the EV927072 and a cartridge is delivered automatically every 12 months.
Also available open box: the EV927076 system at a lower price than new, in packaging that may have been opened or show minor wear.
Conclusion
Installing the H-300 comes down to a short sequence: mark the mounting height, mount the head, connect the inlet and outlet lines, install the cartridge, and check for leaks while you flush the system. Check each connection as you go, and run the flush before first use.
After that, replace the cartridge on schedule, or let the subscription handle the timing. Keep a spare EV927072 on hand, and use our Everpure EV927072 (H-300) Filter Replacement Guide for the procedure.