The Everpure EV979845 SR-X Feeder Inhibitor System reduces scale buildup and helps protect against corrosion in commercial warewashing, steam, and ice equipment. The system is designed for foodservice operators and the maintenance staff who are responsible for keeping that equipment running.
A first-time Everpure EV979845 system installation takes an estimated 10–15 minutes. This guide walks through each stage, from choosing the mounting spot to the final leak check. Replacing the cartridge on time matters, because an overdue cartridge stops protecting the equipment from scale once its Hydroblend has fully dissolved.
Safety & Preparation
Choose the Mounting Location
Pick a wall or frame that can carry the SR-X Feeder at its full operating weight of 4 lb (1.8 kg), with room for the unit's 12.44" H x 5.16" W x 5.5" D (31.5 x 13.1 x 13.9 cm) footprint. The system mounts vertically, bowl hanging down, and needs 2-1/2 inches (6.35 cm) of open space beneath the cartridge so the cartridge can be replaced without removing the unit.
SR-X Feeder Dimensions
🔍 Operating limits: check that the supply line meets each of these before installation:
Both ports are 3/4" FNPT and are meant for a 3/4" water line. If your line is a different size, use the reducer bushings packed with the system rather than forcing a fitting.
Have Everything Ready
🧰 Materials
In the box:
Supply separately:
⚠️ Safety Precautions
Step-by-Step Installation
Common Installation Mistakes
The red cards below cover mistakes that should never happen. The amber cards cover mistakes that can be corrected after installation, with the fix for each. Requirements already covered in another section are linked rather than repeated.
The spec sheet sets a maximum service flow plus pressure and temperature ranges, and the pressure must be non-shock. Confirm the line meets every limit in Safety & Preparation before the system goes into service, not after.
A filled system is heavier than the empty unit, and the spec sheet calls for a location that supports it at full operating weight. If a surface is questionable, choose another that meets the requirement in Safety & Preparation.
A tilted, sideways, or inverted unit doesn't meet the spec sheet's mounting requirement. Shut off the water, then remount the system in the orientation given in Safety & Preparation.
If the space underneath is too tight, the next cartridge replacement becomes difficult. Move the unit higher or clear the area below until it meets the clearance in Safety & Preparation.
A dry O-ring may not seal properly at the bowl. Shut off the water, remove the bowl, lubricate the O-ring, and seat it back in its groove. Replace it if it shows damage. Then reattach the bowl securely.
The ports are sized for a specific line, listed in Safety & Preparation. If your line doesn't match, shut off the water and fit the reducer bushings that come with the system instead of forcing a connection.
What to Expect After Installation
Start-Up Checks
Once the water supply is back on, look over the inlet connection, the outlet connection, and the bowl for any sign of moisture. Repeat the check after the equipment downstream has drawn water for a few cycles. Start-up involves no electrical hookup, since the system has none (see Safety & Preparation).
Confirm that water reaches the equipment at a steady rate within the limits in Safety & Preparation, and that the housing is still firmly mounted and upright. Sort what you find using the two columns below:
✅ Normal After Installation
🔎 Worth a Second Look
The system is ready for service when every item in the left column holds. For anything in the right column, go to Troubleshooting & FAQ. From here, the cartridge needs regular inspection, as set out in When to Replace Your Filter Cartridge.
Official Product Resources
Everpure's EV9798-45 spec sheet is the official reference for this system. It lists the service flow rate, pressure and temperature ranges, dimensions, operating weight, connection sizes, and the replacement cartridge part number, along with Everpure's installation and operation tips.
When to Replace Your Filter Cartridge
The SR-X Feeder has no fixed replacement date. How long a cartridge lasts depends on how quickly its Hydroblend compound dissolves at your site, so the schedule is driven by regular inspection:
Check the SS-IMF cartridge at least once every six months, and more often if you see it emptying quickly.
Install a new cartridge while some Hydroblend is still left. Once it has completely dissolved, scale protection stops.
Two sites with the same system can need replacements at different times, so go by what each inspection shows.
🔍 Translucent cartridge: the SS-IMF body is translucent, so each inspection is a visual check of how much Hydroblend remains.
The replacement cartridge is the Everpure SS-IMF (EV979932), sold here as a 12-pack. For a set-it-and-forget-it approach, the optional subscription ships a 12-pack every 12 months so a spare cartridge is already on site when an inspection calls for one. The subscription handles supply only. Your inspections still decide when each cartridge is replaced.
How to Replace the Cartridge
- Close the water supply to the line.
- Remove the bowl and take out the used SS-IMF cartridge.
- Check the O-ring. Lubricate it, and replace it if it is worn or damaged.
- Place the new SS-IMF cartridge and the spacer in the bowl.
- Reattach the bowl securely, keeping the unit vertical with the bowl hanging down.
- Restore the water supply and run the checks in What to Expect After Installation.
How to Maximize the Lifespan of Your Filter
A few routine habits keep the SR-X Feeder working as intended and make each cartridge replacement easier:
- Inspect on schedule: check the cartridge at the interval set in When to Replace Your Filter Cartridge, and look at how much Hydroblend remains each time.
- Check more often at heavier-demand sites: where water hardness, alkalinity, TDS, or temperature runs higher, shorten the time between inspections.
- Keep the clearance open: don't let supplies or equipment fill the space below the cartridge.
- Look for leaks: check the inlet, outlet, and bowl for moisture during each routine check.
- Stay inside the operating limits: keep flow, pressure, and temperature within the ranges in Safety & Preparation.
- Keep the housing accessible and clean: an unobstructed, clean exterior makes inspections and replacements quicker.
Replace each cartridge before its Hydroblend is gone, using the guidance in When to Replace Your Filter Cartridge.
Troubleshooting & FAQ
What does the SR-X Feeder do, and how does Hydroblend work?
The SR-X Feeder reduces scale and helps protect against corrosion in commercial warewashing, steam, and ice equipment. Its SS-IMF cartridge holds Hydroblend, a polyphosphate blend, and the patented design releases a controlled amount into the water for long-term protection.
What does the NSF/ANSI 42 certification cover?
The SS-IMF cartridge is certified under NSF/ANSI Standard 42 for material requirements only.
How long does Everpure EV979845 system installation take?
An estimated 10 to 15 minutes for a first-time installation. Each step is laid out in Step-by-Step Installation.
How should the system be oriented, and how much clearance does it need?
Install it vertically with the bowl hanging down, and leave 2-1/2 inches (6.35 cm) of clear space below the cartridge so it can be replaced easily.
What line size does the system need?
A 3/4-inch water line. The inlet and outlet are 3/4-inch FNPT, and optional reducer bushings are included.
Do I need to delime my equipment first?
Deliming the equipment before installation is recommended but not required.
How do I know when to replace the cartridge?
Inspect the SS-IMF cartridge at least every six months, and replace it before the Hydroblend compound has completely dissolved. Because the cartridge is translucent, each inspection shows how much compound is left. The full schedule is in When to Replace Your Filter Cartridge.
Does the system need electricity?
No. The SR-X Feeder requires no electrical connection.
Why is the bowl or a connection leaking?
Shut off the water. Check that the O-ring is lubricated, seated, and undamaged, and that the bowl is fully reattached. Then check the inlet and outlet fittings.
Why is flow low?
First, make sure the water supply is fully turned back on. Then confirm that demand on the line stays at or below 6.0 gpm and that pressure is within 10–125 psi. If both check out, shut off the water and confirm the cartridge and spacer are seated correctly. The full operating limits are in Safety & Preparation.
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.
Product & Replacement Options
If your site needs a different package or setup than the EV979845, compare the related scale-inhibitor options below. The easiest way to keep SS-IMF cartridges in stock follows them.
The SR-X system rated for 6 gpm, packaged with a 2.2 lb supply of ScaleKleen scale remover for sites that want to delime equipment first.
View Product →A related scale reduction cartridge rated for 6 gpm, with a listed 12-month capacity, sold as a 6-pack.
View Product →A scale inhibitor feeder kit for Everpure Endurance high-flow systems, rated for 6.0 gpm, with a 3/4" inlet and 1/2" outlet.
View Product →Never Run Out of SS-IMF Cartridges
Auto-delivery ships an SS-IMF 12-pack every 12 months, so a new cartridge is on hand whenever an inspection calls for one.
Conclusion
Installing the SR-X Feeder comes down to a clear sequence. Prepare a location that can carry the system, mount the housing, lubricate the O-ring, seat the cartridge and spacer, connect the inlet and outlet, confirm the unit is vertical, and restore the water. Before the system goes into service, the connections and bowl should stay dry and flow to the equipment should be steady.
After that, the ongoing task is inspecting the SS-IMF cartridge and replacing it on time, following When to Replace Your Filter Cartridge. To keep a spare ready for the next change, see the auto-delivery option in Product & Replacement Options.