# Aqua-Computer Deckel for ULTITUBE Reservoir (model 34121) - Replacement Top Cap

**URL:** https://aio.lv/en/product--aqua-computer-34121--3877947
**Data updated:** 2026-03-11 11:44 (EET)
**Category:** Computer Component Accessories
**Manufacturer:** Aqua-Computer
**Manufacturer code:** 34121
**EAN:** 4260473312703
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.49 €
**Prices and availability valid until:** 2026-07-08 23:59
**Price without VAT (21%):** 15.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--aqua-computer-34121--3877947

## 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 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Replacement top cap designed by Aqua-Computer for the ULTITUBE reservoir, model 34121. Serves as the removable deckel (lid) for the coolant expansion/reservoir container, providing a secure closure and service access. Suitable for use in custom water-cooling loops where the original ULTITUBE cap needs replacement or spare part. Compatible with ULTITUBE series reservoirs.

## Long description

The Aqua-Computer Deckel for ULTITUBE Reservoir (replacement top cap) is a purpose-made lid designed to fit ULTITUBE series coolant expansion and reservoir containers. It provides a secure closure for the reservoir while allowing easy removal for maintenance and filling. The part is intended as a direct replacement or spare for systems that use the original ULTITUBE top cap and is compatible with the corresponding reservoir geometry and mounting interface.
Advantages
This replacement top cap is engineered to match the original ULTITUBE fit and function, ensuring a reliable seal and straightforward service access. Manufactured to the brand's specifications, it preserves the reservoir's intended performance and ease of maintenance. The design supports repeated removal and reinstallation without compromising the interface between cap and container.
Suitable for
 Replacement of a damaged or lost ULTITUBE reservoir top cap
 Keeping a spare part for custom water-cooling loop maintenance
 Systems requiring original-fit components to maintain leak-free coolant containment
Key specifications
 Form: removable top cap designed for reservoir closure
 Compatibility: fits ULTITUBE series reservoirs with matching interface
 Function: provides secure seal and service access for filling and maintenance
 Durability: suitable for repeated removal and reinstallation during servicing
How to use
To replace the existing top cap, ensure the cooling loop is depressurized and coolant level is below the opening. Unscrew or unclip the original cap according to the reservoir's removal procedure, align the replacement Deckel with the reservoir interface, and seat it firmly until the cap engages. After installation, check the seal visually and perform a leak test by pressurizing or refilling the loop and observing the joint during operation.
Usage recommendations
Inspect sealing surfaces for debris or damage before installation and clean with a lint-free cloth. Replace O-rings or seals if worn. Use the part only with compatible ULTITUBE reservoirs and follow standard water-cooling maintenance procedures to avoid leaks or contamination.

## FAQ

### How much does the Aqua-Computer Deckel for ULTITUBE 34121 cost, and is it available for purchase?

The price is 18.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 Aqua-Computer 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 Aqua-Computer 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

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