# CPU Watercool Heatkiller liquid cooling reservoir 0.375 L black/transparent 70×70×198.5 mm

**URL:** https://aio.lv/en/product--watercool-30201--2086925
**Data updated:** 2026-03-07 11:03 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** Watercool
**Manufacturer code:** 30201
**EAN:** 4251312602499
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 129.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 107.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--watercool-30201--2086925

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Watercool Heatkiller is a liquid cooling reservoir for PC cooling loops with a coolant capacity of 0.375 L. The unit measures 70 × 70 × 198.5 mm, weighs 0.78 kg and features a black and transparent finish. Designed for integration into custom liquid-cooling systems, it stores coolant, helps maintain system fill level and supports easy visual inspection of fluid condition.

## Long description

Watercool Heatkiller liquid cooling reservoir 0.375 L black/transparent is a compact reservoir designed for custom PC liquid-cooling loops. With a coolant capacity of 0.375 L and external dimensions of 70 × 70 × 198.5 mm, this reservoir stores coolant, enables straightforward visual inspection of fluid condition through its transparent sections and supports maintaining the system fill level. The unit combines a black housing with a transparent borosilicate glass tube and is part of a modular tube series developed for reliable, low-maintenance operation in high-end custom cooling systems.
Advantages
The borosilicate glass tube offers high chemical and thermal resistance, scratch resistance and low thermal expansion, making it durable and chemically stable in contact with common coolant additives. A large filling mouth with a bayonet catch lid allows tool-free opening and easy refilling, reducing maintenance time. The reservoir is designed to minimize wasted internal volume, providing a relatively large usable coolant reserve for its size. An anti-cyclone inlay and streaming-optimized pump chamber reduce vortex formation and noise while improving air bleeding and flow stability. Manufactured in Germany, the design supports optional mounts, pump adapters and illumination accessories for flexible integration.
Suitable for
Custom PC liquid-cooling loops requiring a compact reservoir with visual fluid inspection
Systems using D5 or DDC pump adapters or standalone reservoir installations
Builds where low maintenance and reduced air vortexing are desired
Key specifications
Coolant capacity: 0.375 L
Dimensions (W × D × H): 70 × 70 × 198.5 mm
Weight: 0.78 kg
Material (tube): borosilicate glass (transparent)
Housing finish: black
Large filling mouth with bayonet catch lid for tool-free opening
Anti-cyclone inlay to reduce vortices and simplify air bleeding
Streaming-optimized pump chamber compatible with pump-adapter versions
Designed for modular mounting options and optional illumination strips
How to use
Install the reservoir in the chosen position according to available mounting options, ensuring secure fastening to prevent movement. If using a pump-adapter version, attach the compatible pump (D5 or DDC type) following the pump manufacturer’s instructions and the reservoir adapter alignment. Fill the reservoir through the large filling mouth using the appropriate coolant for your system, close the bayonet catch lid tool-free, and run the loop to purge air. Monitor fluid level and condition visually through the transparent tube and top up as needed to maintain proper system fill.
Usage recommendations
Use coolant formulations recommended for PC liquid cooling and avoid mixing incompatible additives. When installing, allow sufficient space for the 198.5 mm height and consider available bracket or pedestal options for secure mounting. Periodically inspect the reservoir for sediment or discoloration and perform routine system flushing if contamination is detected.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Coolant capacity | 0.375 L |

### Design

| Feature | Value |
|---|---|
| Product colour | Black, Transparent |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.78 kg |
| Height | 198.5 mm |
| Width | 70 mm |
| Depth | 70 mm |

## FAQ

### How much does the Watercool Heatkiller cooling reservoir 0.375 L cost, and is it available for purchase?

The price is 129.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 08.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Watercool Heatkiller cooling reservoir 0.375 L be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Watercool 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 Watercool 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/2086925/56529029_large.webp