# Carlo Poletti A53803T 3/4 inch Fitting for Expansion Tank

**URL:** https://aio.lv/en/product--carlopolett-a53803t--4580797
**Data updated:** 2026-06-10 09:24 (EEST)
**Category:** Heating Radiators
**Manufacturer:** CARLO\_POLETT
**Manufacturer code:** A53803T
**EAN:** 8025459063057
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 14.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--carlopolett-a53803t--4580797

## 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 A53803T is a high-quality 3/4 inch fitting designed specifically for expansion tank connections in heating and plumbing systems. This durable component ensures a secure and leak-proof installation, maintaining optimal pressure and system integrity. It is an essential part for professional HVAC maintenance and reliable expansion tank integration in residential or commercial heating circuits.

## Long description

The Carlo Poletti A53803T is a professional-grade 3/4 inch fitting engineered for the secure connection of expansion tanks within heating and plumbing systems. This component is designed to provide a robust, leak-proof interface that supports the stable operation of pressurized circuits. By ensuring a precise fit, it helps maintain system integrity and prevents common issues associated with improper tank integration in both residential and commercial HVAC setups.
Advantages
This fitting stands out due to its high-quality construction, which ensures long-term durability even under the demanding conditions of heating systems. Its precise 3/4 inch threading allows for a seamless connection, reducing the risk of leaks and pressure drops. The component is built to withstand thermal expansion and contraction, making it a reliable choice for maintaining the overall efficiency and safety of your plumbing infrastructure.
Suitable for
Connecting expansion tanks in residential heating circuits
Integration of expansion vessels in commercial HVAC systems
Professional plumbing and heating maintenance projects
Upgrading or replacing existing expansion tank connections
When it may not be suitable
This fitting is specifically designed for 3/4 inch connections and will not be compatible with systems requiring different pipe diameters or specialized thread types. It is intended for standard heating and plumbing applications and may not be suitable for high-pressure industrial steam systems or aggressive chemical transport lines.
Key specifications
Connection size: 3/4 inch
Application: Expansion tank integration
Compatibility: Heating and plumbing systems
Material: Durable metal alloy
How to use
To install the fitting, ensure the heating system is depressurized and drained to prevent leaks. Apply appropriate thread sealant or tape to the threads to ensure a watertight seal. Screw the fitting onto the expansion tank connection and tighten it securely using a suitable wrench, taking care not to overtighten. Once installed, slowly refill the system and check the connection point for any signs of moisture or leaks before bringing the system to full operating pressure.
What to consider before purchase
Verify that your expansion tank connection requires a 3/4 inch fitting
Ensure the fitting material is compatible with your existing pipework
Check local plumbing codes for installation requirements
Confirm the pressure rating of your system matches the component specifications
Usage recommendations
Regularly inspect the connection point during routine system maintenance to ensure the seal remains intact and free from corrosion or leaks.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.369 kg |

## FAQ

### How much does the Carlo Poletti A53803T 3/4 inch Expansion Tank Fitting cost, and is it available for purchase?

The price is 17.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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/4580797/52285575_large.webp