Optional Single Configuration Water Filtration System with Manifold and Cartridge, Hoshizaki H9320-51

Help protect your ice machine and serve better-tasting ice.

The Hoshizaki H9320-51 helps reduce chlorine-related taste and odor, fine particles, and lime-scale buildup before incoming water reaches compatible equipment. This complete package includes one manifold and one 4HC-H cartridge rated for flow up to 2 GPM and a capacity of 21,000 gallons.

Under Hoshizaki’s published test conditions, the cartridge provides 97.3% average chlorine reduction, nominal one-micron filtration, and 95.6% reduction of particles one micron and larger. For an operation trying to improve incoming water quality with one matched assembly, that’s a useful combination of taste-and-odor reduction, particulate filtration, and scale-control support.

The Hoshizaki H9320-51 isn’t a universal filter or a substitute for treatment based on the site’s water chemistry. Confirm the connected equipment, required flow, incoming pressure, water conditions, and available service space before ordering.

Confirm these details before ordering the Hoshizaki H9320-51.

Replace the cartridge by capacity, time, or condition.

Hoshizaki advises replacing the 4HC-H cartridge at approximately 21,000 gallons or within six to 12 months, depending on usage and water conditions. Heavy sediment, rapid consumption, or a noticeable loss of flow may require earlier service. Record the installation date and estimated water volume instead of waiting for an obvious ice-machine problem.

A loaded cartridge can restrict water flow even when it looks normal from the outside. Possible signs include slower water delivery, longer fill times, reduced downstream pressure, water-related machine errors, or unexpected production changes. Those symptoms can also result from the supply valve, plumbing, inlet screen, water pressure, or machine components, so inspect the complete water path before blaming the filter.

Use the ice-machine water-filter replacement guide to build a service schedule around capacity, elapsed time, pressure, and site conditions.

Match the 2 GPM rating to the exact ice machine.

Maximum filter flow and daily ice production measure different things. The H9320-51 can deliver up to 2 GPM within its rated pressure range, but that figure doesn’t establish compatibility with every Hoshizaki model. Water demand, fill pattern, equipment type, production range, and Hoshizaki’s current filtration recommendation all matter.

Verify the complete ice-machine model number before purchase. Don’t rely only on daily production or a matching brand name, especially for flake, cubelet, dispenser, or multi-unit equipment. A twin or triple H9320 configuration may be more appropriate when the connected load requires greater flow or capacity.

Know what the NSF/ANSI 42 certification means.

The Hoshizaki H9320-51 is certified for the NSF/ANSI 42 functions published by Hoshizaki, including chlorine taste and odor reduction, bacteriostatic effects, and Class I particulate filtration. These functions support better aesthetic water quality and mechanical filtration. They don’t mean the system removes every contaminant or makes unsafe source water potable.

Do not use this system with microbiologically unsafe water or water of unknown quality without adequate disinfection before or after filtration. Test challenging source water and obtain appropriate treatment guidance when hardness, iron, chloramines, microorganisms, or other conditions fall outside the cartridge’s published functions.

The filtration system can help reduce lime-scale accumulation, but it won’t remove existing deposits or replace the ice machine’s prescribed cleaning, descaling, or sanitizing procedures. Our commercial ice-machine filtration and cleaning guide explains how filtration and routine machine care serve different purposes.

Leave room for fast, clean cartridge changes.

Mount the system where the manifold, shutoff, connections, and cartridge remain accessible without moving the ice machine. Keep the incoming water between 35°F and 100°F, support the plumbing correctly, and follow current Hoshizaki instructions and local code.

When replacement is due, install the H9655-11 cartridge specified for this system. Shut off the water, relieve pressure as directed, avoid contaminating the connections, and complete the prescribed flushing and leak checks before returning the ice machine to service. Thoughtful access now makes every future filter change easier.

Frequently asked questions about the Hoshizaki H9320-51

How often should the Hoshizaki H9320-51 filter be changed?

Replace the 4HC-H cartridge at approximately 21,000 gallons or within six to 12 months, depending on usage and water conditions. Replace it sooner if sediment loading, reduced flow, pressure loss, or the connected equipment’s requirements call for earlier service.

Which replacement cartridge fits the Hoshizaki H9320-51?

Use the H9655-11 single replacement cartridge. Hoshizaki also offers the H9655-06 six-pack for operations managing several cartridge changes. Confirm the part number before installation.

What flow rate and water pressure does the H9320-51 require?

The system is rated for a maximum flow of 2 GPM and working pressure from 10 to 125 PSI. The connected ice machine may have a narrower acceptable range, so the installation must satisfy both sets of requirements.

Will an ice machine stop working when its filter is clogged?

It can. A severely restricted cartridge may reduce water flow enough to extend fill times, lower production, trigger a water-related error, or stop some machines. The filter doesn’t provide a universal replacement alert, and similar symptoms can have other causes.

Does NSF/ANSI 42 mean the filter makes unsafe water safe?

No. NSF/ANSI 42 covers the specific aesthetic and mechanical-filtration claims published for this system. Do not use the filter with microbiologically unsafe water or water of unknown quality without adequate disinfection before or after filtration.

The Hoshizaki H9320-51 is a practical fit when a compatible ice machine needs a single-cartridge filtration system with 2 GPM flow, 21,000-gallon capacity, and targeted support for chlorine-related taste and odor, fine particles, and scale buildup. Confirm the equipment match and source-water conditions, then compare other ice-machine water-filtration systems if the installation needs more flow, greater capacity, or different treatment capabilities.