# Check valve Tetra CV 4 — inline non-return valve for aquarium plumbing

**URL:** https://aio.lv/en/product--tetra-05059--12064101
**Data updated:** 2026-03-12 21:43 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 05059
**EAN:** 4004218608085
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 6.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-05059--12064101

## 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

Tetra CV 4 check valve is an inline non-return valve designed for aquarium plumbing to prevent backflow and protect pumps and filters. Compatible with standard tubing used in aquaria, it allows unidirectional water flow and helps avoid siphoning after power loss. Simple to install in return or drain lines and suitable for hobby and professional aquatic systems.

## Long description

The Tetra CV 4 — inline non-return valve for aquarium plumbing is a compact check valve designed to prevent reverse flow in aquarium systems. It permits unidirectional water movement through standard aquarium tubing and helps protect pumps and filters from backflow and potential damage after power outages or during maintenance. The valve is intended for straightforward in-line installation and integrates with common return or drain lines used in both hobby and professional aquatic setups.
Advantages
This check valve offers reliable prevention of siphoning and backflow, reducing the risk of water damage and equipment stress. Its compact inline form factor allows installation directly within tubing runs without bulky fittings. The valve is constructed for durability and compatibility with standard aquarium hoses, providing consistent one-way flow while requiring minimal maintenance.
Suitable for
Preventing backflow in return lines of freshwater and marine aquariums
Protecting external pumps and filters from siphoning after power loss
Use in sump systems, canister filter return lines, and external overflow drains
Key specifications
Inline check valve design for installation within tubing
Compatible with standard aquarium tubing inner diameters common to small to medium systems
Unidirectional flow allowing water to pass in one direction only
Compact, streamlined body suitable for concealed or neat plumbing runs
Low resistance to flow to minimize impact on pump performance
How to use
Install the Tetra CV 4 in the return or drain line so that the arrow or flow direction marking on the valve aligns with the intended water movement. Ensure tubing is cut cleanly and pushed fully onto the valve barbs for a secure fit; use hose clamps if needed for additional security. Position the valve above the waterline where possible to reduce the chance of trapping air, and check for leaks after powering the system. Regularly inspect the valve for debris accumulation and confirm that it operates freely during routine maintenance.
Usage recommendations
For reliable operation, select tubing that matches the valve barbs and avoid sharp bends immediately before or after the valve. Periodically remove and rinse the valve if you notice reduced flow or any debris; do not use aggressive chemicals that could degrade the valve materials. When integrating into critical systems, consider placing the valve in an accessible location for easier inspection and maintenance.

## FAQ

### How much does the Check valve Tetra CV 4 cost, and is it available for purchase?

The price is 7.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 70 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 Tetra 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 Tetra 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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