# Ultrafine (Nano) Bubble Generators for Washing Machines and Faucets

Source: https://www.ningboware.com/products/ultrafine-bubble-generator/
Publisher: Cixi Zhonghe Sanitary Ware Factory (ZHONGHE), Cixi, Ningbo, Zhejiang, China. Contact: steven@ningboware.com
Updated: 2026-10-16

ZHONGHE makes its own ultrafine (nano) bubble generators in two types: a washing-machine adapter that fits between the machine's water inlet and its inlet hose (G3/4), and a faucet type that fits on the end of a faucet. Both use the structure of Japanese utility model registration No. 3246521, whose certificate names ZHONGHE as the right holder. They have no model codes and sit outside the 96-model online catalog; they are supplied OEM/ODM, with MOQ and pricing confirmed per project.

![Washing-machine ultrafine bubble generator, adapter type: a metal fitting with a thread at the top for the inlet hose and a knurled nut at the bottom that goes onto the washing machine's water inlet](https://www.ningboware.com/assets/ufb-generator-washing-machine-adapter.jpg)

*Washing-machine adapter: the inlet hose goes on the thread at the top; the knurled nut at the bottom goes onto the machine's water inlet.*

## Key facts

| Item | Detail |
| --- | --- |
| Types | Washing-machine adapter type; faucet type |
| Structure | Japanese utility model registration No. 3246521 (non-submerged ultrafine bubble generating device); the certificate names ZHONGHE as the right holder |
| Washing-machine adapter | Fits between the machine's water inlet and the inlet hose; G3/4; about 36 mm high, about 32 mm wide, about 87 g; brass or stainless steel body |
| Faucet type | Fits on the end of the faucet; about 24 mm wide, about 70 mm high; chrome-plated brass body; basin-faucet arm and kitchen-faucet adapters available |
| Model codes | None: not part of the 96-model online catalog |
| Bubble measurement | Measurement records exist (one for each type) and are provided with their measurement conditions during discussions. |
| Effect claims | None |
| MOQ and price | Confirmed per project |

## Washing-machine adapter type

An adapter that goes onto the washing machine's own water inlet; the inlet hose is then refitted on top of it.

| Item | Detail |
| --- | --- |
| Where it fits | Between the washing machine's water inlet and the inlet hose |
| Connection | G3/4 |
| Size and weight | About 36 mm high, about 32 mm wide; about 87 g |
| Body material | Brass or stainless steel, depending on the specification |
| Gasket | Supplied; it goes in when the adapter is fitted to the inlet |
| Installation | Three steps, no tools: (1) take the inlet hose off the washing machine's water inlet; (2) fit the adapter onto the machine's water inlet with the gasket in place; (3) refit the inlet hose onto the top of the adapter. |
| Fit | Whether it fits depends on each machine's water inlet and inlet hose, so confirm by model. On older machines a worn inlet may leak, or the adapter may not fit. |

## Faucet type

A generator that fits on the end of the faucet. Like the washing-machine adapter, it uses the structure of utility model No. 3246521.

![Faucet-type ultrafine bubble generator, a chrome-plated cylinder with dimension lines marking about 24 mm wide and about 70 mm high](https://www.ningboware.com/assets/ufb-generator-faucet-straight.jpg)

*Faucet type, about 24 mm wide and about 70 mm high (dimension lines on the photo).*

![Faucet-type generator fitted to the basin-faucet arm adapter](https://www.ningboware.com/assets/ufb-generator-faucet-arm-adapter.jpg)

*On the basin-faucet arm adapter (about 100 × 47 × 60 mm).*

![Faucet-type generator fitted to the kitchen-faucet adapter](https://www.ningboware.com/assets/ufb-generator-faucet-kitchen-adapter.jpg)

*On the kitchen-faucet adapter.*

| Item | Detail |
| --- | --- |
| Size | About 24 mm wide, about 70 mm high |
| Material and finish | Brass body, chrome-plated |
| Supplied with | A rubber ring and an adapter |
| Fitting | Male-thread faucets (about 22 mm) take it directly; female-thread faucets (about 24 mm) take it with the supplied adapter. Check the thread at the end of the target faucet. |
| Matching adapters | A basin-faucet arm adapter (about 100 × 47 × 60 mm) and a kitchen-faucet adapter |

## The white water, and the bubbles you cannot see

ISO 20480-1 calls bubbles under 100 µm across fine bubbles: those from 1 µm up to 100 µm are microbubbles, and those under 1 µm are ultrafine bubbles, which retail copy often calls nano bubbles.

![Water from a ZHONGHE bubble generator caught in a clear glass; the water looks milky white](https://www.ningboware.com/assets/fine-bubble-white-water.jpg)

*Water from a ZHONGHE generator, caught in a glass. The white look comes mainly from light scattered by micro-bubbles; ultrafine bubbles are invisible to the eye, so whiteness does not show how many ultrafine bubbles there are.*

Video: https://www.ningboware.com/assets/video/zhonghe-ultrafine-bubble-generator-demo.mp4 — Demo of ZHONGHE's ultrafine bubble generator: the water in the beaker turns white. The white look comes mainly from light scattered by micro-bubbles; it is not a measurement, and no bubble count, size or effect is claimed.

Measurement records exist (one for each type) and are provided with their measurement conditions during discussions. Bubble counts and sizes change with water pressure, water temperature, water quality and the measuring method, so no figure is published or guaranteed; evaluate samples against your own standard.

If a bubble count is printed on retail packaging, measure it on the actual product and print the measuring conditions next to it. In Japan, the Fine Bubble Industries Association guideline asks for the number concentration per mL, the mean diameter and the measuring conditions together.

## The structure: Japanese utility model No. 3246521

Both types use the structure of Japanese utility model registration No. 3246521, "non-submerged ultrafine bubble generating device", registered on 19 April 2024; the certificate names ZHONGHE as the right holder. The registration record and the original certificate are listed under [document records](/company/#document-records).

A utility model certificate is a registration record, not a product performance test, and its current rights status is checked per project. Internal shapes and dimensions are not published. How ZHONGHE designs bubble-generating structures is described under [bubble development](/design-manufacturing/#bubble-development).

## What ZHONGHE does not claim

ZHONGHE makes no cleaning, deodorizing, laundry-result or water-feel claims for these generators; any claim on the buyer's packaging rests on the buyer's own evaluation and evidence.

The generators are described by what they are and how they fit: type, connection, size, material and installation. No bubble count, bubble size or effect is stated for them on this site.

## OEM/ODM route

| Item | Detail |
| --- | --- |
| Products | Washing-machine adapter type; faucet type, with the basin-faucet arm adapter and the kitchen-faucet adapter |
| Brand and packaging | Logo and packaging options are confirmed per project |
| Material choice | Washing-machine adapter body in brass or stainless steel, chosen by specification; the faucet type has a chrome-plated brass body |
| MOQ and price | MOQ and pricing are confirmed per project, based on the specification and quantity. No retail or single-unit orders. |
| Design changes | Changes to the fitting or the appearance are reviewed together with the internal structure; see [design and manufacturing](/design-manufacturing/#bubble-development) |
| Samples | Sample terms follow the site's [commercial terms](/oem-odm/) and are confirmed per project |
| How to inquire | There is no model code, so the RFQ list cannot hold these products. Send a normal inquiry: the inquiry button on this page pre-selects the product category |

Inquiry (product category pre-selected): https://www.ningboware.com/contact/?category=Ultrafine%20bubble%20generators%20(washing%20machine%20%2F%20faucet)

## FAQ

### Where does the washing-machine nano bubble generator fit?

Between the washing machine's own water inlet and its inlet hose: it is an adapter with a G3/4 connection, fitted with a gasket in three steps without tools. Whether it fits depends on each machine's water inlet and inlet hose, so confirm by model. On older machines a worn inlet may leak, or the adapter may not fit.

### Which faucets does the faucet-type bubble generator fit?

Male-thread faucets of about 22 mm take it directly, and female-thread faucets of about 24 mm take it with the supplied adapter. A basin-faucet arm adapter (about 100 × 47 × 60 mm) and a kitchen-faucet adapter are also available. Check the thread at the end of the target faucet.

### Does ZHONGHE publish bubble counts or bubble sizes for these generators?

No. Bubble counts and sizes change with water pressure, water temperature, water quality and the measuring method, so no figure is published or guaranteed. Measurement records exist (one for each type) and are provided with their measurement conditions during discussions. White-looking water does not show ultrafine bubbles: the whiteness comes mainly from light scattered by micro-bubbles.

### Do these generators clean, deodorize or improve laundry?

ZHONGHE makes no cleaning, deodorizing, laundry-result or water-feel claims for these generators; any claim on the buyer's packaging rests on the buyer's own evaluation and evidence. Evaluate samples against your own standard before writing any retail copy.

### How do I ask for a quotation without a model code?

Use the inquiry form with the product category "Ultrafine bubble generators (washing machine / faucet)"; the inquiry button on the product page selects it for you. These products are not in the 96-model catalog, so they cannot be added to the RFQ list. MOQ and pricing are confirmed per project, based on the specification and quantity. No retail or single-unit orders.

## Related pages

- Micro and nano bubble shower heads: https://www.ningboware.com/shower-heads/micro-nano-bubble-shower-heads/
- Bubble development: https://www.ningboware.com/design-manufacturing/#bubble-development
- Utility model registration record: https://www.ningboware.com/company/#document-records
- OEM/ODM route: https://www.ningboware.com/oem-odm/
- Product catalog: https://www.ningboware.com/products/
- Send an inquiry: https://www.ningboware.com/contact/?category=Ultrafine%20bubble%20generators%20(washing%20machine%20%2F%20faucet)