# Giacomini R91X003 Automatic Air Vent 1/2 inch

**URL:** https://aio.lv/en/product--giacomini-r91x003--4907185
**Data updated:** 2026-06-10 09:32 (EEST)
**Category:** Heating Radiators
**Manufacturer:** GIACOMINI
**Manufacturer code:** R91X003
**EAN:** 4770364168130
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 2.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--giacomini-r91x003--4907185

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 26.06.2026 | free |
| Pickup points | 01.07.2026 | 1.99 EUR |
| Courier delivery to door | 01.07.2026 | 4.99 EUR |

## Summary description

The Giacomini R91X003 is a high-quality automatic air vent designed for heating and cooling systems. With a 1/2 inch connection, it efficiently removes trapped air from radiators and piping circuits, preventing airlocks and improving system performance. This durable component ensures reliable operation and helps maintain optimal pressure levels in residential or commercial hydronic installations.

## Long description

The Giacomini R91X003 automatic air vent is a precision-engineered component designed to maintain the efficiency of hydronic heating and cooling systems. Featuring a 1/2 inch connection, this device is specifically built to automatically discharge trapped air from radiators, manifolds, and piping circuits. By preventing the accumulation of air pockets, it eliminates common issues such as noise, corrosion, and reduced heat transfer, ensuring that your system operates at its peak performance levels consistently.
Advantages
This automatic air vent offers exceptional durability and reliability due to its high-quality construction materials. Its compact design allows for easy installation in tight spaces, while the automatic mechanism ensures continuous operation without the need for manual intervention. By effectively removing air, it helps to stabilize system pressure and prolong the lifespan of pumps and other critical components within the hydronic circuit.
Suitable for
Residential heating systems
Commercial hydronic installations
Radiator air venting
Manifold and piping circuit air removal
When it may not be suitable
This component is designed specifically for water-based heating and cooling systems and is not suitable for use with steam systems or aggressive chemical fluids. It should not be installed in environments where the operating temperature or pressure exceeds the manufacturer's specified limits.
Key specifications
Connection size: 1/2 inch
Function: Automatic air discharge
Application: Heating and cooling systems
Material: High-quality brass alloy
How to use
The Giacomini R91X003 should be installed at the highest points of the heating or cooling circuit or at locations where air is likely to accumulate. Ensure the device is mounted in a vertical position to allow the internal float mechanism to function correctly. Once installed, the cap should be loosened slightly to allow the automatic venting process to begin. No further manual adjustments are typically required during normal operation.
What to consider before purchase
Verify that the 1/2 inch connection size is compatible with your existing piping.
Ensure the installation point is at a high point in the system for maximum efficiency.
Check that the system pressure and temperature are within the recommended operating range.
Usage recommendations
Regularly inspect the air vent for any signs of leakage or debris accumulation to ensure long-term functionality. If the system water quality is poor, consider installing a filter to prevent sediment from interfering with the internal float mechanism.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.26 kg |

## FAQ

### How much does the Giacomini R91X003 Automatic Air Vent 1/2 inch cost, and is it available for purchase?

The price is 3.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 243 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 26.06.2026 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 GIACOMINI 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 GIACOMINI 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/4907185/30576211_large.webp