# Ball valve INVENA MILLENIUM with butterfly handle, internal/external thread 1/2" - ZK-31-015

**URL:** https://aio.lv/en/product--invena-hzk-31-015--11836337
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Kitchen & Bathroom Faucets
**Manufacturer:** INVENA
**Manufacturer code:** H/ZK-31-015
**EAN:** 5907798742288
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 7.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--invena-hzk-31-015--11836337

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Ball valve INVENA MILLENIUM ZK-31-015 features a butterfly (wing) handle and combined internal/external 1/2" thread. Designed for flow shut-off and control in residential and commercial plumbing systems, it suits water supply lines, heating circuits, and general piping where a compact quarter-turn valve with threaded connections is required.

## Long description

Ball valve INVENA MILLENIUM with butterfly handle, internal/external thread 1/2" - ZK-31-015 is a compact quarter-turn shut-off valve designed for use in residential and commercial plumbing systems. The valve features a butterfly (wing) handle for manual operation and combined internal/external 1/2" threaded connections that allow installation between threaded pipe sections or fittings. It is intended for flow shut-off and basic flow control in water supply lines, heating circuits and general piping where a small, easy-to-operate threaded ball valve is required.
Advantages
The valve's quarter-turn ball design provides quick and clear on/off operation while the butterfly handle enables easy manual control in confined spaces. Combined internal and external 1/2" threads increase installation flexibility, permitting connection to different threaded fittings without additional adapters. The compact form factor makes it suitable for tight installation areas and standard household piping.
Suitable for
 Domestic cold and hot water supply lines
 Heating circuit branches and radiator shut-off
 General threaded piping installations in apartments and small commercial premises
Key specifications
 Valve type: ball valve with quarter-turn operation
 Handle type: butterfly (wing) handle for manual operation
 Connection: combined internal and external 1/2" threaded ends
 Application: flow shut-off and basic flow control in water and heating systems
 Design: compact form factor for installations in limited spaces
How to use
Install the valve in the pipeline using the 1/2" threaded ends, ensuring proper sealing with appropriate thread sealant or tape as required by the system. Operate the valve by turning the butterfly handle approximately 90 degrees: perpendicular to the pipe axis for closed position and parallel for open position. Before installation or maintenance, depressurize and drain the section of the system where the valve will be fitted. Perform visual inspection after installation to confirm there are no leaks at the threaded joints.
Usage recommendations
Use the valve for on/off control and occasional throttling only; it is not intended for fine flow regulation. Avoid using excessive force on the butterfly handle to prevent damage to the operating mechanism. Periodically check threaded connections for tightness and inspect for signs of leakage; if used in heating systems, follow system-specific maintenance intervals and water quality recommendations to prevent premature wear.

## FAQ

### How much does the Ball valve INVENA MILLENIUM ZK-31-015 cost, and is it available for purchase?

The price is 9.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 20.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All INVENA products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized INVENA service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11836337/67236002_large.webp