# Hardtube fitting OPTIMUS 12 mm, black — single compression connector for rigid tubing

**URL:** https://aio.lv/en/product--optimus-op-fit-hard-12mm-black-single--11866897
**Data updated:** 2026-03-09 17:44 (EET)
**Category:** Computer Component Accessories
**Manufacturer:** OPTIMUS
**Manufacturer code:** OP-FIT-HARD-12MM-BLACK-SINGLE
**EAN:** 850015187292
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 20.99 €
**Prices and availability valid until:** 2026-08-16 23:59
**Price without VAT (21%):** 17.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--optimus-op-fit-hard-12mm-black-single--11866897

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

OPTIMUS hardtube fitting for 12 mm rigid tubing in black. Single compression-style connector designed to secure and seal hard tubing runs in liquid cooling or custom fluid routing applications. Provides a compact connection point for straight tubing segments, compatible with 12 mm outer-diameter hard pipes. Suitable for PC water-cooling loops, custom cooling systems and other installations requiring a durable, low-profile threaded connector.

## Long description

OPTIMUS hardtube fitting for 12 mm rigid tubing in black is a single compression connector designed to join and seal straight segments of hard tubing in liquid cooling and custom fluid routing applications. The fitting provides a low-profile threaded connection that secures 12 mm outer-diameter rigid pipes, creating a compact point for inline transitions or extensions within water-cooling loops and other closed fluid circuits.
Advantages
This single compression connector combines a simple, compact design with a threaded compression mechanism to deliver a reliable seal for hard tubing. The black finish offers visual uniformity in systems where aesthetics and low reflectivity are desired. The fitting is engineered for mechanical stability and repeated assembly, enabling maintenance or reconfiguration without specialized tools.
Suitable for
PC liquid-cooling loops using 12 mm outer-diameter hard tubing
Custom cooling systems and prototype fluid circuits
Enclosed or space-constrained installations requiring a low-profile connector
Situations where a threaded compression joint is preferred for serviceability
Key specifications
Compatible tube outer diameter: 12 mm rigid hard tubing
Connector type: single compression (single ferrule) threaded connector
Finish: black (matte or low-reflectivity coating)
Recommended application: liquid cooling and custom fluid routing
Mechanical connection: compression seal designed for rigid pipe retention
How to use
Prepare the 12 mm hard tubing by cutting squarely and deburring the end to ensure a flat mating surface. Insert the tube into the fitting until it seats fully against the internal stop, then tighten the compression collar by hand and finish with an appropriate tool if necessary to achieve a secure seal. Do not overtighten; compression fittings are designed to seal by deformation of the ferrule against the tubing and body. Inspect the joint for alignment and test the system at low pressure before returning to normal operating conditions.
Usage recommendations
Use only rigid tubing that matches the specified 12 mm outer diameter and check compatibility with the coolant to avoid chemical interactions. During assembly, ensure tube ends are clean and free of chips to maintain sealing integrity. Periodic inspection during maintenance cycles is advised to confirm continued seal performance.

## FAQ

### How much does the Hardtube fitting OPTIMUS 12 mm — black cost, and is it available for purchase?

The price is 20.99 € (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 03.08.2026 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 OPTIMUS 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 OPTIMUS 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/11866897/67271677_large.webp