In-Line UVC Water Sterilizer — ZXSJ-UVC-1GPM
A stainless-steel UVC-LED sterilizer that installs in-line on 1/4" tubing. It is a post-treatment unit: it treats water that has already been purified by an RO system or under-sink purifier, and it starts automatically when water flows. 1 GPM (4 LPM), 100–240 V adapter, no tank or plumbing change.
Sourcing, distributing or rebranding?
Pricing, MOQ, sample and OEM terms — see ordering.
Engineering it into a system?
Full specification and operating envelope — jump to specs.
What is the ZXSJ-UVC-1GPM — and what is it not?
It is an in-line UV post-treatment device for point-of-use drinking water. Water enters one fitting, passes the UVC-LED emitter, and leaves the other fitting. It contains no filter media and does not purify water on its own — the purifier upstream does that work, and this unit keeps the water that has already been treated from being recontaminated downstream.
That distinction matters commercially as much as technically. Buyers who expect a standalone purifier will be disappointed by a device with no filter inside it; buyers who want to hold the microbiological quality of treated water steady all the way to the tap are the ones this product is built for.
| This unit is | This unit is not |
|---|---|
| An in-line UVC sterilizer for water that has already been purified | A standalone water purifier — it has no filter element and removes no sediment, chlorine or dissolved solids |
| A point-of-use device for a single outlet: under-sink RO, countertop purifier, drinking-water tap | A whole-house or point-of-entry treatment system — the rated flow does not support building-wide supply |
| A complement to reverse osmosis, installed after the storage tank and before the faucet | A replacement for reverse osmosis — it does not desalinate, soften or remove PFAS |
| Flow-actuated: it runs while water flows and stops when the tap closes | A storage or recirculation device — it holds no water and nothing recirculates through it |
Pre-filter → purifier → storage tank → this unit → faucet. Everything upstream protects the unit (clear, low-hardness water keeps the quartz sleeve clean); everything downstream of it is short by design. If the feed water is unfiltered, the correct fix is upstream treatment, not a different sterilizer.
Treatment on demand — with no switch to remember
A flow sensor on the inlet side detects movement the moment a tap opens. The UVC-LED switches on, the water passes the emitter chamber, and when the flow stops the lamp returns to standby. There is no timer, no schedule and no manual start: the unit is either seeing flow and treating it, or it is idle.
| Stage | What happens |
|---|---|
| Inlet (marked on the housing) | Water that has already been filtered enters here. A flow sensor on this side detects movement the moment a tap opens. |
| Treatment chamber | Water passes the UVC-LED emitter inside the stainless-steel housing. Treatment happens in a single pass at the rated flow rate. |
| Outlet | Treated water leaves towards the faucet. Inlet and outlet are not interchangeable — see the note below. |
What "flow-actuated" means in practice
- Tap closed. No flow, lamp off. The blue ring indicates the unit has power and is in standby.
- Tap opened. The flow sensor triggers, the UVC-LED runs, and the ring turns green.
- Tap closed again. Flow stops, the lamp switches off, the ring returns to blue.
The flow sensor sits on the inlet side. If the tubing is reversed, nothing breaks — but the sensor never sees flow, so the lamp never starts and the ring stays blue. Check the inlet marking on the housing before pushing the tube home.
What the three indicator colours mean
The ring light on the housing is the only routine check the unit asks for. Three states, no display, no app:
Green means the lamp is running — it is not an indication that the delivered UV dose has been reached. Dose depends on water clarity, flow rate and the condition of the quartz sleeve. Where a dosing claim has to be evidenced, it must be measured, not read off the indicator.
ZXSJ-UVC-1GPM — full specification
Values below are as marked on the product label and as printed in the product parameter table. Certification coverage is listed separately, because a certificate number alone tells a buyer nothing about which model it covers.
| Model number | ZXSJ-UVC-1GPM |
|---|---|
| Product type | In-line UVC-LED sterilizer — post-treatment unit for RO and under-sink purifiers |
| Rated flow rate | 1 GPM (4 LPM) |
| Water pipe fitting | 1/4" 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 — see ordering |
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.
1 GPM or 3 GPM — which one fits the system?
Choose on flow rate and on the tubing already installed. A single drinking-water tap rarely exceeds 1 GPM, which is what the 1 GPM model is rated for. The 3 GPM model exists for systems that feed more than one outlet or a higher-demand appliance, and it takes 3/8" tubing rather than 1/4".
| Parameter | ZXSJ-UVC-1GPM | ZXSJ-UVC-3GPM |
|---|---|---|
| Rated flow rate | 1 GPM (4 LPM) | 3 GPM (11.4 LPM) |
| Water pipe fitting | 1/4" quick-connect | 3/8" quick-connect |
| Housing material | Stainless steel | Stainless steel |
| Power adapter | Same adapter 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 | |
| Typical application | Single under-sink RO tap, point-of-use drinking water | Multi-outlet or higher-demand installations |
| CE certificate | Covered — DPCW/01068/06/KA/26 | |
| EPA establishment registration | Covered — 105777-CHN-1 (facility registration) | |
Send the host system details — purifier type, tank size, number of outlets and feed water — and the flow requirement can be narrowed down before sampling. Oversizing does not improve treatment; it only changes the fittings you need to stock.
What ships with the unit
| UV sterilizer | ×1 |
|---|---|
| Power adapter | ×1 |
| PTFE tube | 15 cm (5.9 in) lengths, 1/4" and 3/8" |
| U40 pipe clips | ×2 |
| Tube cutter | ×1 — for the supplied tube material |
| Instruction manual | Included |
- Adapter is region-agnostic. The 100–240 V input means one SKU covers US, EU and UK markets; only the mains plug tail differs.
- Tube and clips are consumables. Stock them as spares if you are supporting installers, since a retrofit joint is where leaks appear first.
- Carton and pallet data — net weight, unit dimensions, carton dimensions and units per carton — are issued on request against a live quotation.
- Branding. The unit ships with the manufacturer's brand and model marking. OEM programmes can be discussed, subject to the certification constraints below.
The CE certificate and the EPA filing name the manufacturer and the model number. Any change to the model designation, the housing marking or the certificate holder's identity can move a unit outside the scope of its existing coverage. Bring rebranding requirements into the conversation early — before artwork is committed.
Request pricing, MOQ and OEM terms
Tell us the host system and the market you are selling into, and the first reply can be specific rather than generic.
- Models: ZXSJ-UVC-1GPM ｜ ZXSJ-UVC-3GPM
- 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, fittings and accessories configurable; model designation and certification scope must be respected
- Documentation pack: certificate copies, parameter table and installation manual issued with quotation
Send an enquiry
Typical response within one business day.
This form is not yet connected to a mail service — the enquiry endpoint will be wired up at launch.
Sources and scope
4 sources
- Product specifications: SKWEIT® UV Water Sterilizer instruction manual, revision 01.03 (model ZXSJ-UVC-1GPM), and the accompanying product parameter table. 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-1GPM. 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), certificate holder Suzhou Purple Core Instant Purification Technology Co.,Ltd.; 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], where ZXSJ is the company prefix, UVC the technology line and the final segment the rated flow. Cited for the model designations used on this page.
Related pages
The higher-flow unit in the same series, its rated envelope and the points where the two differ.
Fitting a UV stage to an existing RO system
Where the stage goes in the chain, what it needs upstream, and the sizing rule for a retrofit.
Under-sink UVC-LED installation
Cabinet layout, fittings and the feed-water conditions the installation assumes.
The documents held for this model — and the open items named on the record.