In-Line UVC Water Sterilizer — ZXSJ-UVC-3GPM
The higher-flow model in the same series: a stainless-steel UVC-LED sterilizer rated 3 GPM (11.4 LPM) on 3/8" quick-connect tubing. Same housing construction, same flow-actuated operation and the same power adapter as the 1 GPM model — different rated flow, different fittings, and built for systems that feed more than one outlet.
Comparing the two models?
Side-by-side specification — see the comparison.
Feeding several outlets?
Sizing notes and what the flow rating does and does not cover — read the sizing note.
When is the 3 GPM model the right choice?
When the sterilizer has to keep up with more than a single drinking-water tap, or when the installation already uses 3/8" tubing. A single under-sink RO faucet typically draws well under 1 GPM; the 3 GPM model is for systems that serve several draw points from one treatment line, or where a 3/8" line is what is already on the wall.
Both models in this series share the same design: a stainless-steel housing, a flow sensor on the inlet, a UVC-LED emitter chamber and a ring indicator. Nothing about the construction changes between them — the difference is the rated flow and the port size, and both are certified under the same two instruments.
More than one draw point
Where a single treated line feeds two or more taps, the total simultaneous draw is what the sterilizer has to handle, not the flow of one faucet.
3/8" tubing already installed
Matching the existing line avoids adapters and extra joints — every added joint is another potential leak point in a retrofit.
Higher-demand appliances
Equipment that draws treated water at a higher rate than a drinking tap, connected on the same post-treatment line.
3 GPM is a rating for a post-treatment line, not a building supply. This model is not a point-of-entry or whole-house treatment system, and the rated flow should not be read as covering simultaneous demand across a property. If the requirement is building-wide, this is the wrong product category.
ZXSJ-UVC-3GPM against the 1 GPM model
| Parameter | ZXSJ-UVC-3GPM | ZXSJ-UVC-1GPM |
|---|---|---|
| Rated flow rate | 3 GPM (11.4 LPM) | 1 GPM (4 LPM) |
| Water pipe fitting | 3/8" quick-connect | 1/4" quick-connect |
| Housing material | Stainless steel | Stainless steel |
| Power adapter | Identical on both models — 100–240 V~ in, 24.0 V⎈ 1.5 A out | |
| UVC-LED rated life | 15,000 hours (design rating) on both models | |
| Operation | Flow-sensor actuated on both models — starts on flow, stops when flow stops | |
| Indicator | Blue: powered/standby · Green: sterilising · Red: fault | |
| CE certificate | Covered on both — DPCW/01068/06/KA/26 | |
| EPA establishment registration | Covered on both — 105777-CHN-1 (facility registration) | |
| Typical application | Multi-outlet post-treatment line, 3/8" installations | Single under-sink RO tap |
ZXSJ-UVC-3GPM — specification
Values below are as marked on the product label and as stated in the product parameter table for this model. Where a figure is not yet released for publication it is marked as available on request rather than estimated.
| Model number | ZXSJ-UVC-3GPM |
|---|---|
| Product type | In-line UVC-LED sterilizer — post-treatment unit for RO and under-sink purifiers |
| Rated flow rate | 3 GPM (11.4 LPM) |
| Water pipe fitting | 3/8" quick-connect (push-fit), both ports |
| Housing material | Stainless steel |
| Working water pressure | 0.1–0.3 MPa (14.5–43.5 psi) · maximum 0.4 MPa (58 psi) |
| Power adapter | Model HSTF-2401500C · input 100–240 V~ 50/60 Hz 0.8 A max · output 24.0 V⎈ 1.5 A |
| UVC-LED rated life | 15,000 hours — design rating, not a measured figure (see note below) |
| Operation | Flow-sensor actuated. Starts on flow, stops when flow stops. No switch, no timer. |
| Indicator | Ring light — blue: powered/standby · green: sterilising · red: fault |
| Water temperature | Cold water only — 32–100 °F (0–37.8 °C) |
| Intended water | Pre-filtered drinking water. Not for river, lake, well or other unfiltered supply. |
| Net weight, dimensions, carton | Available on request — issued with quotation |
15,000 hours is the design rating for the UVC-LED assembly, taken from the manufacturer's product specification. It is not a tested lifetime figure and we do not present it as one. Real service life depends on drive current, thermal conditions and water quality. Where regulated markets require an evidenced lifetime claim, the LED assembly should be qualified by your own programme before that claim is made in your market.
Certification coverage for this model
| Instrument | Reference | Holder / status |
|---|---|---|
| CE conformity certificate (LVD + EMC) | DPCW/01068/06/KA/26 |
INTERCERT Global sp. z o.o. (Warsaw). Certificate holder: Suzhou Purple Core Instant Purification Technology Co.,Ltd. |
| EPA establishment registration | 105777-CHN-1 |
United States Environmental Protection Agency. This is a facility registration, not a product certification. |
| Not held | — | We hold no NSF certification, no FCC certification, no RoHS declaration and no UN38.3 report for this product, and we make no claim to the contrary. |
The certificates and the EPA filing carry a trade name that differs from the brand under which this model is sold. The certificate holder is Suzhou Purple Core Instant Purification Technology Co.,Ltd.; the manufacturer is the same company and the model number is identical, so the coverage applies to the model listed above. Original certificate copies are available to buyers on request.
What the 3 GPM rating does and does not cover
A flow rating is a single number, and it is easy to read more into it than it says. The rating describes the flow at which the unit is specified to treat water — it is not a promise about pressure drop across a shared line, and it does not stack with other treatment stages.
| The rating covers | The rating does not cover |
|---|---|
| Water passing this unit at up to 3 GPM (11.4 LPM) at the specified pressure and clarity | Simultaneous draw across a property — this remains a point-of-use device, not a point-of-entry system |
| Pre-filtered water, cold, within the stated feed water envelope | Unfiltered or hard water — scale on the quartz sleeve reduces UV transmission regardless of flow rating |
| A single treatment line downstream of a purifier or storage tank | Flow losses elsewhere in the system, or the capacity of the purifier feeding this unit |
Buying a larger rated flow than the system needs does not produce better water — it only changes the fittings you have to stock and the line size you have to run. Size to the actual simultaneous draw, then check that the feed water is inside the operating envelope. If those two conditions are met, the rating is doing its job.
Request pricing, MOQ and OEM terms
Send the host system details and the market you sell into, and the first reply can address the sizing question directly.
- Models: ZXSJ-UVC-3GPM ｜ ZXSJ-UVC-1GPM
- Certification: CE conformity certificate DPCW/01068/06/KA/26 · EPA Establishment No. 105777-CHN-1 (facility registration)
- Samples: available for evaluation before a volume commitment
- OEM / ODM: available on programme terms — packaging and accessory configuration; model designation and certification scope must be respected
- Documentation pack: certificate copies, parameter table and installation manual issued with quotation
Send an enquiry
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Sources and scope
4 sources
- Product specifications: SKWEIT® UV Water Sterilizer instruction manual, revision 01.03, and the accompanying product parameter table (both models in the series). Cited for: rated flow rate, working pressure, fittings, adapter specification, operation, indicator states and carton contents.
- Product label data: as marked on the housing of model ZXSJ-UVC-3GPM. Cited for: model number, maximum flow rate, power adapter input and output, water pressure range, pipe fitting and exterior material.
- Certification status: CE conformity certificate DPCW/01068/06/KA/26 (INTERCERT Global, Warsaw); EPA Establishment registration No. 105777-CHN-1. Cited for: certification coverage of this model. EPA Establishment registration is a facility registration and is not a product certification.
- Model numbering: SKWEIT® product model numbering rules — format
ZXSJ-UVC-[flow rating]. Cited for the model designations used on this page.
Related pages
The lower-flow unit, its rated envelope and the points where the two differ.
Why a well supply needs pre-treatment before a disinfection stage does its work.
What is documented for this model, and what is still listed as outstanding.