Everpure H-300 Replacement Cartridge: Complete OEM-Compatible Guide

The Everpure H-300 is the single most popular commercial water filter cartridge in the world. If you service coffee machines, espresso equipment, or combi ovens, you have almost certainly handled an H-300.

This guide covers everything a distributor or service company needs to know about sourcing OEM-compatible H-300 replacement cartridges — specs, pricing, compatibility verification, and supplier selection.

What Is the Everpure H-300?

Spec	Value
Part numbers	EV9612-21 (H-300), EV9612-22 (H-300-HSD)
Diameter	79 mm (3.125”)
Length	~254 mm (10”)
Connection	Bayonet twist-lock (QL2 / QL3 / QL3B head)
Media	Proprietary carbon block (coconut shell)
Rated capacity	30,000 L (7,925 gal) at 1.9 L/min
Chlorine reduction	>97%
Particle filtration	0.5 μm nominal
Operating pressure	10–125 psi
Operating temperature	2–38°C (35–100°F)

The H-300 uses a fine-mesh carbon block that reduces chlorine, chloramines, taste, odor, and particulates to 0.5 micron. The H-300-HSD variant adds scale inhibition (polyphosphate feed) for hard-water areas.

What Equipment Uses H-300?

Equipment type	Brand examples
Espresso machines	La Marzocco, Nuova Simonelli, Rancilio, Faema
Bean-to-cup machines	Franke, Schaerer, WMF, Melitta
Combi ovens	Rational SelfCooking Center, Convotherm
Ice makers	Manitowoc, Hoshizaki, Scotsman (select models)
Water dispensers	Elkay, Oasis, Haws
Post-mix soda fountains	Cornelius, Lancer, Multiplex

If you service any commercial kitchen or coffee shop, the H-300 is the filter cartridge in 60%+ of installations.

Original H-300 vs OEM-Compatible: Cost Comparison

Item	Original Everpure	XZH Compatible
Unit price (MSRP)	$80–$120	—
Unit price (distributor)	$55–$75	—
FOB Ningbo (500 pcs)	—	$15–$18
FOB Ningbo (1,000 pcs)	—	$12–$15
FOB Ningbo (5,000 pcs)	—	$10–$13
Landed cost (Moscow, 1,000)	$60–80 (EU import)	$14–$18
Retail price potential (RF)	5,000–7,000 ₽	2,500–3,500 ₽

Bottom line: The end customer pays half price, and the distributor still makes 50–70% margin — versus 25–35% on original.

Replacement Schedule

Application	Water hardness	Replace every
Coffee/espresso	Soft (<60 ppm)	12 months
Coffee/espresso	Hard (>120 ppm)	6 months
Combi oven	Soft	12 months
Combi oven	Hard	4–6 months
Ice maker	Any	6 months
Drinking water	Any	12 months

The H-300 has a built-in shut-off valve that engages when the cartridge reaches capacity. This prevents bypass of unfiltered water — a critical safety feature also present in XZH’s compatible version.

What to Check When Sourcing Compatible H-300

1. Diameter tolerance. Must be 79 mm ±0.3 mm. Oversized = won’t fit QL3 head. Undersized = bypass leakage.
2. O-ring position. The upper O-ring seals against the head. Position tolerance ±1 mm.
3. Carbon iodine value. Original H-300 uses ≥1000 mg/g coconut carbon. XZH uses ≥1100 mg/g.
4. Flow rate. Must deliver 1.9 L/min at 60 psi with <10 psi pressure drop.
5. Shut-off valve. Verify the auto-shutoff engages at end-of-life. Critical for food-safety compliance.
6. Leak test. 100% vacuum test on every cartridge — non-negotiable.

H-300 vs H-300-HSD: What’s the Difference?

Feature	H-300	H-300-HSD
Primary media	Carbon block	Carbon block + polyphosphate
Chlorine reduction	✅	✅
Scale inhibition	❌	✅ (polyphosphate)
Best for	Normal water	Hard water (>100 ppm)
Price difference	Baseline	+15–20%

The HSD variant is essential for hard-water markets like Moscow, Kazakhstan, and the Middle East. XZH offers both versions.

Bundle Strategy: Combine H-300 with Related SKUs

A smart first order pairs the H-300 with its companion cartridges:

Product	Why bundle	FOB (1,000 pcs)
H-300 (carbon)	Core product	$12–15
H-300-HSD (carbon + scale)	Hard-water upsell	$14–18
4FC (high-capacity carbon)	Next step up	$14–20
H-104 (smaller, lower cost)	Budget alternative	$10–15
MC2 (particulate pre-filter)	System pairing	$15–22

One container = 3 Everpure models × 1,000 pcs each + 2,000 standard 10” PP = complete commercial service catalog.

Why XZH for H-300 Compatibles

• 7 Everpure-compatible models covering 90% of installed base
• Coconut-shell carbon: iodine value ≥1100 mg/g, ≥ original spec
• 100% vacuum leak test on every cartridge
• Auto-shutoff valve integrated — matches original functionality
• OEM/private label: your brand on cartridge and packaging, MOQ 2,000 pcs
• Free samples for qualified buyers
• Quote within 2 working hours

Request H-300 quote →

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See also: Everpure H-300 vs H-104 vs i2000 comparison · Everpure cross-reference chart · Commercial filter cost comparison