# ARCO adapter Combi 3/8"F x 3/4"M COMBI89 — plumbing threaded connector

**URL:** https://aio.lv/en/product--arco-combi89--11362998
**Data updated:** 2026-03-07 19:59 (EET)
**Category:** Kitchen & Bathroom Faucets
**Manufacturer:** ARCO
**Manufacturer code:** COMBI89
**EAN:** 8428519037065
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--arco-combi89--11362998

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

ARCO Combi adapter (model COMBI89) is a threaded plumbing connector featuring a 3/8" female (F) to 3/4" male (M) configuration. Designed for joining pipes, hoses or fittings with differing thread sizes, it provides a mechanical transition between 3/8" and 3/4" threaded components. Suitable for household and light commercial plumbing, repair and installation tasks.

## Long description

ARCO adapter Combi 3/8"F x 3/4"M COMBI89 is a threaded plumbing connector that provides a secure mechanical transition between a 3/8-inch female thread and a 3/4-inch male thread. Manufactured by ARCO, this adapter is intended for use in household and light commercial plumbing systems where components with different thread sizes need to be joined without modifying existing piping or fittings. The compact design allows integration in confined spaces and supports common plumbing materials such as metal and reinforced hose connections.
Advantages
The adapter offers a simple and reliable method to connect mismatched threaded components, avoiding the need for cutting or rethreading pipes. Its threaded interface ensures repeatable mechanical engagement and easy disassembly for maintenance. The compact form factor minimizes additional bulk in piping runs and helps maintain a neat installation. Because it converts between two widely used thread sizes, it reduces the need to source specialty fittings during repair or installation work.
Suitable for
 Connecting a 3/8" threaded outlet or fitting to a 3/4" threaded hose or pipe
 Temporary or permanent plumbing repairs in kitchens, bathrooms, and utility rooms
 Light commercial installations where mixed thread sizes are present
 Workshop or maintenance settings for testing or assembling plumbing assemblies
Key specifications
 Thread connection: 3/8" female to 3/4" male
 Type: Threaded adapter / connector
 Application: Plumbing connections for pipes, hoses and fittings
 Typical use environment: Household and light commercial
 Form factor: Compact inline adapter
How to use
Ensure both mating threads are clean and free of debris or old sealant before installation. Apply an appropriate thread sealant or PTFE tape to the male thread if a watertight joint is required. Hand-start the adapter onto the female thread to avoid cross-threading, then tighten with an appropriate wrench until the connection is secure; avoid excessive torque that could damage threads. When connecting to a hose, make sure any hose ferrules or fittings are correctly aligned and tightened to manufacturer recommendations. After installation, inspect for leaks under normal operating pressure and retighten if necessary.
Usage recommendations
Use compatible sealants for the materials being joined and verify thread type and pitch before installation. For pressurized systems, test the connection at working pressure and check periodically for leaks. Replace the adapter if threads show wear or damage.

## FAQ

### How much does the ARCO Combi adapter 3/8"F x 3/4"M COMBI89 cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 36 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 03.07.2026 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 ARCO 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 ARCO 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/11362998/65846024_large.webp