# Straight coupler Conex 18 x 3/4" brass F041020303--

**URL:** https://aio.lv/en/product--conex-f041020303--11818125
**Data updated:** 2026-03-09 11:05 (EET)
**Category:** Power Tools Accessories
**Manufacturer:** Conex
**Manufacturer code:** F041020303--
**EAN:** 5030068140122
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 9.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--conex-f041020303--11818125

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Conex straight coupler in brass with nominal size 18 x 3/4" (model F041020303--) for connecting pipes or fittings with 18 mm and 3/4-inch threads. Durable brass construction suitable for plumbing installations, providing a threaded transition between metric and imperial dimensions. Used in water supply, heating and general plumbing repairs.

## Long description

The Conex straight coupler in brass with nominal size 18 x 3/4" is a threaded adapter designed to join an 18 mm pipe or fitting to a 3/4-inch threaded connection. Constructed from brass, the coupler provides mechanical strength and corrosion resistance appropriate for water supply, heating circuits and general plumbing repairs. Its metric-to-imperial thread transition allows compatibility between systems that use different thread standards.
Advantages
The brass construction ensures durability and resistance to corrosion in typical plumbing environments. Threaded connections provide a secure mechanical joint without the need for soldering or compression fittings, enabling straightforward installation and removal. The compact straight coupler design minimizes flow restriction while maintaining a reliable seal when installed with appropriate sealing material.
Suitable for
Joining 18 mm copper, PEX or compatible pipes to 3/4" threaded fittings
Repairs and modifications in domestic water supply systems
Connecting components in heating systems and radiators
Temporary or permanent plumbing transitions between metric and imperial thread standards
Key specifications
Material: brass
Connection type: straight, threaded
Nominal sizes: 18 mm to 3/4 inch thread
Application: potable water, heating, general plumbing
Mounting: inline coupling between compatible threaded parts
How to use
Prepare mating threads by cleaning any debris and applying an appropriate pipe thread sealant or PTFE tape to the male thread to ensure a watertight joint. Hand-start the coupler on the male thread to avoid cross-threading, then tighten with a suitable wrench until secure. Do not overtighten to prevent damage to threads or fittings. Verify alignment of connected pipes to avoid stress on the joint and test the assembled connection under working pressure to confirm there are no leaks.
Usage recommendations
Use compatible pipe materials and thread forms; ensure thread sealant is suitable for potable water if used on drinking-water systems. Inspect threads for wear or damage before installation and replace the coupler if deformation is present. For installations involving higher temperatures or pressures, consult system specifications to confirm brass fittings are appropriate.

## FAQ

### How much does the Conex straight coupler 18 x 3/4" F041020303-- cost, and is it available for purchase?

The price is 11.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 75 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 15.07.2026 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 Conex 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 Conex 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/11818125/67220084_large.webp