The Everpure EV979590 (E-20) Prefilter System protects the filters and equipment downstream by catching dirt and rust at 10 microns before they get there. It pairs a 20" slim-bowl housing with a tightly spun EC210 cartridge and is built for foodservice operators, facility managers, and installers dealing with high-sediment water.
Everpure EV979590 system installation takes an estimated 10–15 minutes for a first-time setup, and this guide covers it from mounting through start-up. Once the system is running, timely cartridge replacement matters because a fully loaded or expired cartridge no longer provides the intended protection.
Safety & Preparation
Choose the Mounting Location
The E-20 installs vertically, with the bowl hanging straight down. The mounting surface must hold the system's full operating weight of 8 lb (3.6 kg) and fit its 22.44" H x 5.16" W x 5.5" D footprint. Leave 2-1/2 inches (6.35 cm) of open space below the cartridge so the bowl can come off for cartridge changes.
E-20 Prefilter System Dimensions
🔍 Before you start: confirm your water supply falls within these limits:
The inlet and outlet are 3/4" FNPT, sized for a 3/4" water line. Check both against your existing line before you begin. Optional reducer bushings are included if the line size calls for them.
Have Everything Ready
🧰 Materials
Included with the system:
You will also need:
⚠️ Safety Precautions
Step-by-Step Installation
Common Installation Mistakes
Red cards mark mistakes to avoid entirely. Amber cards mark mistakes you can correct after the fact, and each one explains the fix. Where a requirement is covered elsewhere, the card links to that section.
The spec sheet says not to exceed the service flow rate. Before you install, check that total demand on the line stays within the limit in Safety & Preparation. For lines that need more flow, see Product & Replacement Options.
The EC110 (EV953412) is built for 10-inch housings and is not a replacement for the E-20. Use only the 20-inch EC210, covered in When to Replace Your Filter Cartridge.
The system weighs more in service than it does in the box, and the spec sheet requires a location that supports its full operating weight. If you are unsure about the surface, choose one that meets the requirement in Safety & Preparation.
If the unit is tilted, sideways, or inverted, shut off the water and remount it in the orientation given in Safety & Preparation before going further.
Without enough open space underneath, the bowl can't come off for cartridge changes. Raise the unit or clear the area until it meets the clearance in Safety & Preparation.
Any of these can cause a leak at the bowl. Shut off the water and unscrew the bowl. Lubricate the O-ring and set it back in place, replacing it if it is damaged. Then reattach the bowl until it is fully seated.
The supply line belongs on the inlet, and the outlet feeds the equipment downstream. If the lines are swapped, shut off the water and reconnect them the right way.
If your line doesn't match the port size, fit the included reducer bushings instead of forcing the connection. The port size is listed in Safety & Preparation.
Flush the system before putting it into service. If you skipped this step, run the flush now as described in What to Expect After Installation.
What to Expect After Installation
Start-Up: Flush the System
With the new cartridge installed and the water back on, flush the system for 5 minutes. While the water runs, and again once the flush is done, check the inlet connection, the outlet connection, and the bowl seal for leaks.
Make sure flow to the downstream equipment is steady and within the rated limit in Safety & Preparation. The housing is transparent, so you can also see the cartridge in place without opening it. Use the two columns below to sort what you see:
✅ Normal After Installation
🔎 Worth a Second Look
The system is ready for use once the flush is complete, the connections and bowl seal stay dry, and flow is steady. If anything matches the right-hand column, go to Troubleshooting & FAQ. The clear housing also serves as your inspection window for the cartridge going forward, as explained in When to Replace Your Filter Cartridge.
Official Product Resources
The EV9795-90 spec sheet covers the overall dimensions, service flow rate, pressure and temperature ranges, and inlet and outlet connection sizes, along with Everpure's installation and operation tips.
When to Replace Your Filter Cartridge
Inspect the EC210 periodically to gauge its dirt load. Replace it as soon as either sign below shows up, or at the six-month mark, whichever comes first:
Once dirt has penetrated all the way to the cartridge's inner core, it's time to replace it.
A drop in water flow is a sign to replace the cartridge before the scheduled change.
The general replacement schedule, even if neither sign has appeared yet.
🔍 Clear housing: because the housing is transparent, checking the dirt load is a quick visual inspection. You don't need to open the bowl between changes.
The replacement cartridge is the Everpure EC210 (EV9534-26), a 20-inch, 10-micron drop-in cartridge sold here as a 6-pack. To set it and forget it, an optional subscription delivers a 6-pack every six months, so a new cartridge is ready whenever an inspection or the schedule calls for one. The subscription only keeps you stocked. The signs and schedule above still decide when each cartridge comes out.
How to Replace the Cartridge
- Shut off the water supply.
- Unscrew the bowl and remove the used cartridge.
- Inspect the O-ring. Lubricate it, and replace it if it is worn or damaged.
- Insert the new EC210 cartridge.
- Reattach the bowl securely.
- Turn the water back on and flush as described in What to Expect After Installation.
How to Maximize the Lifespan of Your Filter
These routine habits keep the E-20 running as designed and make cartridge changes faster:
- Stay within the rated limits: keep flow and pressure inside the ranges in Safety & Preparation.
- Check the clear housing on a routine: regular looks at the dirt load help you catch a clogging cartridge before it restricts flow.
- Keep the space below the bowl open: don't let storage or equipment crowd the clearance needed to remove the bowl.
- Look after the O-ring: inspect it at every change and keep it lubricated.
- Watch for leaks: look over the fittings and the bowl seal for drips during routine checks.
Replace the cartridge before it clogs completely, following When to Replace Your Filter Cartridge.
Troubleshooting & FAQ
How long does Everpure E-20 prefilter system installation take?
An estimated 10 to 15 minutes for a first-time installation. The full sequence is in Step-by-Step Installation.
Can the system be mounted horizontally or upside down?
No. The system must be installed vertically, with the bowl hanging straight down.
How much clearance is needed below the system?
Leave 2-1/2 inches (6.35 cm) of clear space below the cartridge so the bowl can be removed for cartridge changes.
What connection size does the system use, and do I need the reducer bushings?
The inlet and outlet are 3/4-inch FNPT, sized for a 3/4-inch water line. The included reducer bushings are optional and only needed if your line size requires them.
How long should I flush the system after installation?
Flush with the new cartridge installed for the time given in What to Expect After Installation, which also covers the leak and flow checks.
Why is flow low, and what should I check first?
Check the cartridge through the clear housing first. If dirt has penetrated to the inner core, replace it. Also confirm that demand on the line stays within the maximum service flow in Safety & Preparation.
Why is the bowl leaking?
Shut off the water and check the O-ring. It should be lubricated, sitting in place, and free of pinches or damage; replace it if it is worn. Then confirm the bowl is fully seated and reattached securely.
When should I replace the cartridge?
Replace it when dirt has penetrated through to the inner core, or on the general six-month schedule if that comes first. The full guidance is in When to Replace Your Filter Cartridge.
Which cartridge fits the E-20?
The Everpure EC210 (EV9534-26), a 20-inch, 10-micron drop-in cartridge. The EC110 (EV953412) is made for 10-inch housings and is not a replacement for this system.
Is this final-stage filtration?
No. It is a prefilter that removes larger dirt and rust particles to protect the primary filters and equipment downstream.
Can the system be used on unsafe or unknown-quality water?
No. Do not use it on water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
Does the system need electricity?
No. The E-20 requires no electrical connection.
Product & Replacement Options
If your system calls for a different flow rate or setup than the E-20, compare the related prefilter options below. After them is the simplest way to keep EC210 cartridges in stock.
The 10-inch version, rated for 4 gpm, for lines with lower flow demand.
View Product →A prefilter kit for MRS reverse osmosis systems, rated for 6 gpm.
View Product →A dual-cartridge kit with a 12-gallon reserve tank, rated for 10 gpm, for higher-flow lines.
View Product →Never Run Out of EC210 Cartridges
Auto-delivery sends an EC210 6-pack every 6 months, so a replacement is always on hand when it's time for a change.
Conclusion
Getting the E-20 into service follows a straightforward order. Confirm the location, shut off the water, mount the system with the bowl hanging down, connect the inlet and outlet, check the EC210 cartridge and O-ring, and flush. Before putting it into service, make sure the connections and bowl seal stay dry and the flow holds steady.
From there, the main job is replacing the cartridge on time. Use the clear housing to track the dirt load, and follow the signs and schedule in When to Replace Your Filter Cartridge. The optional subscription keeps EC210 cartridges on hand, so the next change doesn't have to wait on an order.