Quick-Connect Inline Water Filters
Push-fit inline water filters with 1/4", 3/8" & 1/2" quick-connect fittings. U-type (H-300 / 4FC) and I-type (H-104 / 4SI) cartridges — carbon, UF, sediment, and KDF media options. OEM factory direct from Ningbo.
Quick-Connect Inline Water Filter Overview
Quick-connect inline water filters use push-fit fittings that snap onto water lines without tools, soldering, or plumbing experience. Push the tube in and it locks; press the collet ring to release. This tool-free design makes quick-connect filters the standard for ice machines, commercial coffee equipment, refrigerators, drinking fountains, vending machines, and under-sink purification systems worldwide.
XZH manufactures quick-connect inline water filters in two connector formats: U-type (double O-ring, compatible with H-300 / 4FC head units) and I-type (single O-ring bayonet, compatible with H-104 / 4SI head units), including 10"/11" inline cartridges and 50/75/100 GPD RO membranes. All cartridges are produced in our Ningbo factory with NSF-certified materials.
Technical Specifications
| Parameter | Specification |
|---|---|
| Connection Sizes | 1/4" (6.35 mm), 3/8" (9.525 mm), 1/2" (12.7 mm) push-fit quick-connect |
| Flow Rate | 0.5–4.0 GPM (depending on cartridge length and media type) |
| Working Pressure | Up to 125 PSI (8.6 bar) — tested to 150 PSI burst |
| Operating Temperature | 4–38 °C (39–100 °F) |
| Filter Media Types | Activated carbon (coconut shell GAC/CTO), KDF, PP sediment, UF hollow-fiber membrane, T33 post-carbon, RO membrane |
| Micron Ratings | 0.5 µm, 1 µm, 5 µm, 10 µm, 20 µm, 50 µm — UF membrane: 0.01 µm |
| Chlorine Reduction | ≥ 99% (CTO/GAC carbon media, per NSF 42 protocol) |
| Chloramine Reduction | 85–95% (catalytic carbon option available) |
| Service Life | 6–12 months (residential) / 3–6 months (high-volume commercial) |
| Certifications | NSF/ANSI 42 & 53 compatible materials, FDA-grade housing, ISO 9001 factory |
| Compatible Brands | Everpure/Pentair, 3M/Cuno, Aqua-Pure, Watts, Omnipure, and open-platform systems |
Selection Guide by Application
Choose the right quick-connect inline water filter based on your application. Each configuration is available for OEM private labeling.
| Application | Recommended Media | Micron | Flow Rate | Connection | Key Concern |
|---|---|---|---|---|---|
| Residential under-sink | CTO carbon block + UF | 0.01–1 µm | 0.5–1.0 GPM | 1/4" | Full contaminant reduction, bacteria |
| Commercial coffee / espresso | Carbon + scale inhibitor | 0.5–1 µm | 0.5–1.5 GPM | 3/8" | Scale, chlorine, taste balance |
| Ice machine | Carbon + sediment + scale | 1–5 µm | 1.0–3.0 GPM | 3/8" | Sediment, scale, clear ice quality |
| Refrigerator / drinking fountain | Carbon block | 0.5–1 µm | 0.5–1.0 GPM | 1/4" | Chlorine, taste, lead reduction |
| Vending / beverage dispenser | GAC + sediment | 5 µm | 1.0–2.0 GPM | 1/4" or 3/8" | Taste, odor, equipment protection |
| Foodservice / restaurant | Multi-stage composite | 0.5–5 µm | 1.5–4.0 GPM | 3/8" or 1/2" | Full-line protection, high throughput |
OEM Customization Options
XZH offers full private-label manufacturing for quick-connect inline water filters. All configurations can be customized to your brand specifications.
Mix carbon + KDF, carbon + phosphate, or any multi-media formula to target specific contaminants
Your brand on housing, shrink wrap, retail box, and user manual. Design support included
Standard white or custom Pantone color matching. Tooling fee applies for custom colors
1/4", 3/8", 1/2" push-fit or threaded fittings. Custom adapter kits available
NSF/ANSI 42 & 53 testing, WQA Gold Seal, CE, WRAS documentation support
MOQ 500 pcs (standard config), 2,000 pcs (custom media). Lead time 7–15 working days
U-type cartridges
The U series uses a double O-ring quick-connect mechanism, functionally equivalent to popular H-300 and 4FC interfaces. Designed for under-sink flow systems with no water shut-off needed for replacement. Three sizes: 11" (extended-life, hard water), 8" (compact), 6" (slim). Media options: PP melt-blown, GAC, CTO carbon block, UF hollow-fiber and PP+CTO combined.
U-type product gallery
Click any photo for full specs and a quote request.
U-type · Media options & specs
The U-type housing (6"/8"/11"/13") is available with any of the following media. Specify media + size on your PO.
| Media | Sizes | Key spec | Function |
|---|---|---|---|
| PP | 6"8"11"13" | Filtration 1–5 µm | Captures sediment, rust, biofilm and large organics. |
| GAC | 6"8"11"13" | Indonesian coconut-shell carbon iodine value ≥ 1100 mg/g | Adsorbs dissolved impurities, odor and residual chlorine. |
| CTO | 6"8"11"13" | Sintered coconut-shell carbon block iodine ≥ 1100 mg/g | Removes chlorine, taste, odor; stable flow, no carbon fines. |
| T33 | 6"8"11"13" | Coconut carbon iodine ≥ 1100 mg/g PH ≤ 7.0 | RO post-filter polish — removes residual chlorine, improves taste. |
| UF | 6"8"11"13" | Filtration 0.01–0.2 µm bacteria retention 99.99% | Removes colloids, spores and bacteria. |
| RO | 6"8"11"13" | Filtration 0.0001 µm salt rejection ≥ 95% | Removes bacteria, viruses, heavy metals and dissolved solids. |
* All U-type carbon media uses Indonesian coconut-shell carbon meeting NSF standards. RO membranes available in 50 / 75 / 100 GPD per order.
I-type cartridges
The I series is a single O-ring bayonet cartridge, equivalent to H-104 and 4SI references. More compact connector than U-type — ideal for tight under-sink installations. Sizes 11", 10", 6" — can be combined into full 3-stage systems or slim small-apartment units.
I-type product gallery
Click any photo for full specs and a quote request.
I-type · Media options & specs
The I-type housing (6"/10"/11"/13") is available with any of the following media.
| Media | Sizes | Key spec | Function |
|---|---|---|---|
| PP | 6"10"11"13" | Filtration 1–5 µm | Sediment, rust, biofilm, large organics |
| GAC | 6"10"11"13" | Indonesian coconut-shell carbon iodine ≥ 1100 mg/g | Removes chlorine, taste, odor |
| CTO | 6"10"11"13" | Sintered coconut carbon block iodine ≥ 1100 mg/g | Stable flow, no carbon fines |
| T33 | 6"10"11"13" | Coconut carbon iodine ≥ 1100 mg/g · PH ≤ 7.0 | RO post-filter polish |
| UF | 6"10"11"13" | Filtration 0.01–0.2 µm bacteria retention 99.99% | Colloids, spores, bacteria |
| RO | 6"10"11"13" | Filtration 0.0001 µm salt rejection ≥ 95% | Bacteria, viruses, heavy metals |
* Activated carbon: Indonesian coconut shell, NSF-listed. RO membranes available in 50 / 75 / 100 GPD per order.
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Frequently Asked Questions
- What connection sizes are available for quick-connect inline water filters?
- XZH quick-connect inline water filters are available in three standard push-fit sizes: 1/4" (6.35 mm) for residential systems and refrigerators, 3/8" (9.525 mm) for commercial ice machines and coffee equipment, and 1/2" (12.7 mm) for high-flow foodservice applications. All fittings use stainless steel collet rings with EPDM O-ring seals rated to 125 PSI working pressure.
- Are your quick-connect filters compatible with Everpure and 3M systems?
- Yes. Our U-type cartridges are dimensionally compatible with Everpure H-300 and 4FC head units. Our I-type cartridges fit H-104 and 4SI series heads. The bayonet interfaces are manufactured to the same tolerances as the originals. For 3M/Cuno systems using standard housings (not proprietary SQC heads), our open-platform inline cartridges are direct replacements at 30-50% lower cost.
- What is the MOQ for OEM quick-connect inline water filters?
- Minimum order is 500 pieces for standard configurations (existing media, standard white housing, your logo label). For custom media blends or custom housing colors, MOQ is 2,000 pieces. Sample orders of 10-50 pieces are available for product evaluation before committing to production quantities. Lead time is 7-15 working days for standard orders, FOB Ningbo.
- How long do quick-connect inline water filters last?
- Service life depends on water quality and usage volume. For residential use (average family of 4), carbon and sediment cartridges last 6-12 months. For commercial foodservice applications with higher throughput, replacement intervals are typically 3-6 months. UF membrane cartridges last 2-5 years. We recommend monitoring pressure drop across the cartridge as the most reliable indicator of replacement timing.
- Do your inline filters meet NSF certification standards?
- All XZH inline water filter cartridges are manufactured using NSF/ANSI 42 and 53 compatible materials, including FDA-grade housing plastics and NSF-listed coconut shell activated carbon. Our factory holds ISO 9001 certification and can provide third-party lab test reports for chlorine reduction, sediment removal, and material safety. We also support customers through the NSF, WQA, or WRAS certification process for their private-label products.
Related Products
Compatible and complementary filter categories from our factory.
Snap-on Cartridges
Korean-style cassette cartridges, push-click replacement
Quick Connect Water Filter
Drop-in replacement for Everpure & 3M systems
Everpure-Compatible
Drop-in replacement for Everpure bayonet head units
Filtration Systems
Complete residential RO and UF systems
Coffee Machine Filters
Commercial coffee & espresso water filter cartridges
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Sales manager replies within 2 working hours with a formal quote (FOB Ningbo) including MOQ and lead time.
