# Head Gasket TetraTec EX 400/700 – replacement seal for TetraTec EX series models

**URL:** https://aio.lv/en/product--tetratec-28008--12069363
**Data updated:** 2026-03-12 21:48 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** TetraTec
**Manufacturer code:** 28008
**EAN:** 4004218167285
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 8.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetratec-28008--12069363

## 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

Replacement head gasket for TetraTec EX 400/700 external filter models. This sealing gasket fits the EX series head assembly to ensure proper watertight connection between the filter head and body, preventing leaks and maintaining correct pressure and flow. Suitable for maintenance and repair of TetraTec EX 400 and EX 700 units in home and hobby aquariums.

## Long description

Replacement head gasket for TetraTec EX 400 and EX 700 external aquarium filters. This sealing gasket is designed for the EX series head assembly to restore a watertight connection between the filter head and the filter body, helping to prevent leaks and to maintain correct pressure and flow through the unit. The part is suitable for routine maintenance and repair of home and hobby aquariums using TetraTec EX 400 or EX 700 filters.
Advantages
The gasket provides a precise seal shaped to match the EX series head geometry, reducing the risk of water escaping at the head-to-body joint. It is made from flexible sealing material that tolerates repeated assembly and disassembly, enabling straightforward maintenance. Using the correct replacement gasket helps maintain filter performance and consistent flow rates by preventing pressure loss caused by imperfect sealing.
Suitable for
 Replacing worn or damaged head gaskets on TetraTec EX 400 external filters
 Replacing worn or damaged head gaskets on TetraTec EX 700 external filters
 Routine maintenance to prevent leaks and pressure loss in home and hobby aquariums
 Repairing filter head assemblies after disassembly for cleaning or inspection
Key specifications
 Compatibility: designed to fit TetraTec EX 400 and EX 700 external filter head assemblies
 Function: sealing gasket for head-to-body connection to prevent leaks
 Material: flexible sealing elastomer suitable for aquarium use
 Form: pre-moulded shape matching EX series head geometry for reliable sealing
How to use
Turn off and unplug the filter, then disconnect input and output hoses. Open the filter head according to the manufacturer’s instructions and remove the old gasket. Clean the sealing surfaces of the head and body to remove debris and residue, then position the replacement gasket in the head recess ensuring correct orientation and full seating. Reassemble the head onto the filter body, reconnect hoses, and restore power. Check for leaks and normal flow before leaving the filter unattended.
Usage recommendations
Use only genuine replacement gaskets matched to the EX series to ensure correct sealing. Inspect the gasket during routine maintenance and replace it if you observe cracking, permanent deformation, or persistent leaks. Ensure sealing surfaces are clean and dry before fitting the gasket to maximize lifetime and effectiveness.

## FAQ

### How much does the Head Gasket TetraTec EX 400/700 cost, and is it available for purchase?

The price is 9.99 € (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 TetraTec 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 TetraTec 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/12069363/67554313_large.webp