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Hoshizaki 4HC-H Filter Replacement Instructions

Learn how to replace a Hoshizaki 4HC-H filter with step-by-step installation, flushing, leak inspection, and maintenance guidance.

Turn Off
Step 1

Turn Off

Turn off the water supply before starting.

Connect Fittings
Step 2

Connect Fittings

For single systems (H9320‑51), connect inlet and outlet using 3/8" FNPT fittings. For double (H9320‑52) and triple (H9320‑53) systems, connect using 3/4" MNPT and FNPT fittings.

Insert
Step 3

Insert

Insert the 4HC‑H replacement cartridge into the manifold and twist clockwise until secure.

Flush System
Step 4

Flush System

Turn the water supply back on and flush at least 5 gallons to remove carbon fines and air bubbles.

Check Leaks
Step 5

Check Leaks

Check all connections for leaks before regular use.

Top Sellers

  • H9655-06 | 4HC-H Replacement Cartridges | 6 Pack

  • H9655-06 | 4HC-H Replacement Cartridges | 6 Pack (OPEN BOX)

  • H9655-11 | Replacement Filter for 4HC-H | 1 Pack

  • H9655-11 | Replacement Filter for 4HC-H | 1 Pack (OPEN BOX)

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Maintenance

Follow these care recommendations to keep your unit performing properly.

Replace

Replace every 12 months or when rated gallon capacity is reached (21,000 gal single, 42,000 gal double, 63,000 gal triple).

Inspect

Inspect fittings and tubing regularly for leaks.

Prefilter

Use Everpure E‑10 or E‑20 prefilters in areas with high sediment to extend cartridge life.

Clean

Clean exterior surfaces with a soft cloth and mild cleaner.

Genuine

Only use genuine Hoshizaki replacement cartridges for certified performance.

Service

For service or repairs, consult the manual or a Hoshizaki Certified Service Representative.

Frequently Asked Questions

Turn off the water supply before removing the used cartridge. Hold the old filter securely, rotate it to release it from the manifold, and carefully pull it downward. Insert the new 4HC-H cartridge into the filter head and twist it clockwise until it is securely locked. Restore the water supply, flush at least five gallons, and inspect every connection for leaks before returning the system to regular use.

Compatible 4HC-H systems use the Hoshizaki H9655-11 replacement cartridge for a single-cartridge purchase. The cartridge is compatible with H9320-51 single, H9320-52 twin, and H9320-53 triple filtration systems. View the Hoshizaki H9655-11 4HC-H replacement cartridge for specifications and purchasing information.

Replace each 4HC-H cartridge after approximately 21,000 gallons or every 6–12 months, depending on water conditions and usage. A single H9320-51 system has a 21,000-gallon capacity, while twin and triple configurations provide approximately 42,000 and 63,000 gallons respectively.

After installing the new cartridge, turn the water supply back on and flush at least five gallons through the system. Flushing helps clear trapped air and loose carbon fines before the filtered water is supplied to the connected ice machine or dispenser.

Routine cartridge replacement is relatively straightforward when the existing manifold is correctly installed and accessible. However, new system installation or changes to the plumbing connections should be completed according to the supplied manual and local plumbing requirements. Contact a licensed plumber or certified service representative when the fittings, valves, tubing, or manifold require repair.

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