The Pentair Everpure EV985500 (EF-6000) is a residential under-sink drinking water system that delivers filtered water through your existing tap, with no separate faucet needed. It suits kitchens, prep sinks, and wet bars where you want 6,000 gallons of filtration out of sight.
This guide covers first-time installation, with an estimated install time of 15 to 30 minutes. If you only need to change the cartridge, see our EV985550 replacement guide.
Safety & Preparation
Check the Mounting Location
Make sure the cabinet has room for the unit mounted vertically with the cartridge hanging down. The manufacturer's space requirement is 5 inches wide, 22 inches high, and 5 inches deep, which includes 2.5 inches of clear space below the unit for cartridge changes. Leave room above the filter head as well, so the shut-off handle can move freely.
Everpure EV985500 System Dimensions
Check Your Parts and Supply Line
Compare the parts in the box against the parts list in the manual before you start. Have a length of braided supply tubing on hand for the inlet side, and locate the cold water shut-off valve under the sink.
🧰 Tools & Supplies
⚠️ Safety Precautions
Step-by-Step Installation
⚠️ Note: These steps follow the Basic Installation Instructions in the Everpure EF Series manual.
Common Installation Mistakes
Most problems after installation come from a short list of setup errors. They fall into four groups:
Never mount the head out of vertical. The head and cartridge must hang straight down. Also leave enough room above the head for the shut-off handle, and avoid kinking the tubing.
Leaks usually trace to plumber tape that was skipped or wrapped against the thread direction, fittings tightened past hand tight, or the inlet and outlet reversed. Remember that the inlet is on the left and the outlet is on the right.
Two things cause most cartridge problems: the lug was not aligned with the label on the head, or the turn stopped short of the full quarter turn. Remove the cartridge, realign it, and turn it until it stops.
Weak or no flow most often comes from a QC handle left in the wrong position, a cold water valve that was not fully reopened, or a skipped flush. See What to Expect After Installation for the flush.
What to Expect After Installation
Check every connection from the inlet elbow to the outlet union for leaks. Then flush the new cartridge at full flow for three minutes to purge air. The water may look cloudy at first because of trapped air, and it should clear during the flush.
✅ Normal During the Flush
🔎 Worth a Second Look
If anything lands in the right-hand column, recheck the connections and the cartridge position using Common Installation Mistakes.
Official Product Resources
The manufacturer's documents cover installation and specifications for the EF-6000.
When to Replace Your Filter Cartridge
Replace the cartridge at 6,000 gallons, when flow becomes too slow, or at least once a year, whichever comes first. The filter timer's window turning fully red is the visual cue.
The rated capacity of the cartridge.
Replace it even if the other limits have not been reached.
The longest a cartridge should stay in service.
The recommended replacement is the Everpure EV985550, the cartridge the spec sheet lists for the EF-6000. The EF-1500 and EF-3000 use different cartridges, so match the part number before ordering.
How to Maximize the Lifespan of Your Filter
A few routine habits help the system keep performing as designed:
- Stay within the operating limits. Keep the system within the temperature and pressure limits listed in Safety & Preparation.
- Check fittings and tubing now and then. Look for leaks so a small drip does not turn into a larger one.
- Wipe the exterior. Use a mild, non-abrasive cleaner.
- Keep the area under the sink clear. This keeps the cartridge easy to reach when it is time to change it.
- Record the install date. Write it down alongside the filter timer so you have a second reference for the replacement schedule.
- Replace sooner if flow slows. See When to Replace Your Filter Cartridge for all replacement triggers.
Troubleshooting & FAQ
Do I need a separate faucet?
No. The system delivers filtered water through your existing tap.
Does it work with hot water?
No. It is rated for cold water only. See the operating limits in Safety & Preparation.
What should I check if a connection leaks?
Check the plumber tape, how tight the fittings are, and which side of the head each line is connected to. The Connection Leaks and Cartridge Not Seated items in Common Installation Mistakes cover each one.
What if the cartridge will not lock in?
Remove it and repeat Step 5 in Step-by-Step Installation. Line the lug up with the label on the head and push the cartridge fully upward before turning it.
What should I check if the flow is low?
Check the position of the QC handle, confirm the cold water valve is fully open, and look for kinked tubing. The Flow Problems item in Common Installation Mistakes explains each cause.
How long should I flush, and why is the water cloudy at first?
Flush for three minutes at full flow. Cloudiness at the start comes from trapped air and should clear during the flush. See What to Expect After Installation.
Product & Replacement Options
A single 6,000-gallon replacement cartridge for the EF-6000.
View Product →Six EV985550-series cartridges, for covering several replacements in one order.
View Product →The same EV985500 system as an open-box unit. The packaging may show minor wear.
View Product →Never Run Out of Filters
The EV985550 1-pack 6-month subscription ships on auto-delivery, so your replacement arrives on schedule.
Conclusion
Installing the Everpure EV985500 EF-6000 Drinking Water System comes down to a few tasks: mount the head, connect the supply and faucet tubing, seat the cartridge, and flush the system. Work through Step-by-Step Installation in order, then recheck your connections once water is running.
After setup, the main task is keeping track of when the cartridge is due. Use the triggers in When to Replace Your Filter Cartridge and order the EV985550 before the current one runs out.