# Carlo Poletti A55400BSEN 1/2" to 3/4" Flat Reduction Fitting with O-Ring

**URL:** https://aio.lv/en/product--carlopolett-a55400bsen--12503147
**Data updated:** 2026-06-10 09:25 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** CARLO\_POLETT
**Manufacturer code:** A55400BSEN
**EAN:** 8025459103111
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--carlopolett-a55400bsen--12503147

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The Carlo Poletti A55400BSEN is a high-quality flat reduction fitting designed for plumbing and heating systems. It features a 1/2" to 3/4" connection size and includes an integrated O-ring for a secure, leak-proof seal. This durable component ensures reliable performance in various hydraulic applications, providing a precise transition between different pipe diameters.

## Long description

The Carlo Poletti A55400BSEN is a professional-grade flat reduction fitting engineered for seamless integration into plumbing and heating systems. This component facilitates a precise transition between a 1/2-inch outer thread and a 3/4-inch external thread, ensuring compatibility across various hydraulic setups. Constructed from high-quality brass, the fitting is built to withstand the rigors of constant pressure and temperature fluctuations, providing a robust solution for pipe diameter adjustments.
Advantages
The primary benefit of this reduction fitting is its integrated O-ring, which guarantees a secure, leak-proof seal without the need for excessive additional sealing materials. Its durable brass construction offers excellent resistance to corrosion and mechanical wear, ensuring a long service life in demanding environments. The flat design allows for compact installations, making it an ideal choice for tight spaces where standard fittings might be too bulky.
Suitable for
Connecting pipes of different diameters in heating systems
Plumbing installations requiring a transition from 1/2 inch to 3/4 inch
Hydraulic applications where a secure, leak-proof connection is essential
When it may not be suitable
This fitting is not intended for use in high-pressure industrial steam systems or applications involving highly corrosive chemical fluids that may degrade brass. It is also not suitable for connections requiring non-standard thread types or sizes outside of the specified 1/2 inch to 3/4 inch range.
Key specifications
Material: Brass
Connection 1: 1/2 inch outer thread
Connection 2: 3/4 inch external thread
Sealing: Integrated O-ring
How to use
To install the fitting, ensure that the pipe ends are clean and free of debris. Thread the 1/2-inch side into the corresponding female connection and the 3/4-inch side into the larger female port. Tighten the fitting using an appropriate wrench, taking care not to overtighten, as the integrated O-ring is designed to provide a seal with moderate torque. Verify that the connection is properly aligned to prevent cross-threading.
What to consider before purchase
Verify the thread sizes of your existing pipes to ensure compatibility
Check the space constraints of your installation area
Ensure the system pressure and temperature are within the operational limits of brass fittings
Usage recommendations
Always inspect the O-ring for any signs of damage or debris before installation to ensure a perfect seal. It is recommended to use a calibrated wrench to avoid applying excessive force that could damage the threads or the fitting body.

## FAQ

### How much does the Carlo Poletti A55400BSEN Reduction Fitting 1/2" to 3/4" cost, and is it available for purchase?

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 01.07.2026 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 CARLO\_POLETT 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 CARLO\_POLETT 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/12503147/68842793_large.webp