# KOS Hydro Line Single Bell Push Button, IP44 Hermetic, White

**URL:** https://aio.lv/en/product--kos-120404--12464175
**Data updated:** 2026-05-18 09:41 (EEST)
**Category:** Smart Switches
**Manufacturer:** KOS
**Manufacturer code:** 120404
**EAN:** 5903292352688
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The KOS Hydro Line single bell push button is a hermetic electrical accessory designed for reliable operation in demanding environments. Featuring an IP44 ingress protection rating, it is resistant to moisture and dust, making it ideal for outdoor or high-humidity indoor installations. This durable white unit provides a secure and functional solution for doorbell systems in residential or commercial buildings.

## Long description

The KOS Hydro Line single bell push button is a robust electrical accessory engineered for consistent performance in challenging conditions. With its IP44 hermetic rating, this unit offers reliable protection against splashing water and dust ingress, ensuring long-term functionality in both outdoor settings and high-humidity indoor environments. Its clean white finish and durable construction make it a practical choice for residential and commercial doorbell systems.
Advantages
The primary benefit of this bell push button is its high level of ingress protection, which allows for safe installation in areas exposed to weather or moisture. The materials used in its construction are selected for durability, providing a long service life even when subjected to frequent use. Furthermore, the ergonomic design ensures a tactile and responsive experience for visitors, while the neutral white aesthetic integrates seamlessly with various architectural styles and wall finishes.
Suitable for
Outdoor doorbell installations near entrance doors
High-humidity indoor areas such as porches or covered entryways
Replacement of existing bell push buttons in residential homes
Commercial building entry systems requiring moisture resistance
This product may not be suitable for environments where it will be subjected to direct, high-pressure water jets or complete submersion, as the IP44 rating is intended for splash resistance only. Additionally, it is designed specifically for standard low-voltage doorbell circuits and should not be used for high-voltage industrial switching applications.
Key specifications
Ingress protection rating: IP44
Color: White
Type: Single bell push button
Application: Hermetic, moisture-resistant
To install the KOS Hydro Line bell push button, ensure the power supply to the doorbell circuit is disconnected. Mount the base securely to the wall surface using appropriate hardware, connect the electrical wires to the terminals according to the wiring diagram, and snap the outer cover into place. Test the connection by pressing the button to confirm the chime activates correctly.
What to consider before purchase
Verify that the mounting surface is flat and suitable for screw fixation
Check the compatibility of your existing doorbell chime voltage
Ensure the installation location is protected from direct, heavy rainfall
For optimal performance and longevity, it is recommended to inspect the seal and terminal connections periodically, especially if the unit is installed in an exposed outdoor location. Keep the surface clean from debris to maintain the responsiveness of the button mechanism.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 KOS 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 KOS 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

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