# Anode rod Biawar 21 x 510 mm 3/4" for water heaters (model 22171)

**URL:** https://aio.lv/en/product--biawar-22171--11825918
**Data updated:** 2026-03-09 11:15 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Biawar
**Manufacturer code:** 22171
**EAN:** 5901862141052
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--biawar-22171--11825918

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.99 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Magnesium anode rod Biawar model 22171, 21 x 510 mm with 3/4" thread, designed to protect water heaters and storage tanks from corrosion by sacrificing magnesium to prevent tank rust. Suitable for replacement in compatible boilers and electric water heaters with a 3/4" connection. Practical for routine maintenance and extending appliance service life.

## Long description

Magnesium anode rod Biawar 21 x 510 mm with 3/4" thread is designed to provide electrochemical protection for water heaters and storage tanks. The rod reduces internal corrosion by acting as a sacrificial anode: magnesium preferentially oxidizes instead of the steel tank, slowing rust formation and helping to preserve the heater’s inner surface. This model is intended for replacement during routine maintenance of compatible boilers and electric water heaters that accept a 3/4" anode connection.
Advantages
The Biawar magnesium anode offers a uniform composition and a length suitable for many standard-sized water heaters, enabling effective protection across a significant portion of the tank’s interior surface. Its threaded 3/4" connection allows straightforward installation or replacement without specialized tools in most cases. By sacrificing magnesium rather than the tank, the rod helps extend the service life of the water heater and reduces the frequency of more invasive repairs or tank replacement.
Suitable for (tasks / use cases)
Replacement of depleted anode rods in electric water heaters with a 3/4" connection
Routine maintenance to reduce corrosion inside storage tanks and boilers
Protecting domestic hot water systems in residential buildings
Key specifications
Material: magnesium sacrificial anode
Diameter: 21 mm
Length: 510 mm (total rod length)
Thread size: 3/4" male thread for standard heater fittings
Compatibility: intended for use in water heaters and storage tanks designed to accept a 3/4" anode
How to use
Shut off the water supply and power to the heater before beginning work. Drain sufficient water from the tank to lower the water level below the anode opening. Unscrew the old anode rod from the heater and remove it for inspection; if heavily corroded or depleted, replace it with the Biawar anode. Apply a suitable sealant or tape on the 3/4" thread if required by the heater manufacturer, then screw in the new anode rod until hand-tight and finish with a wrench if necessary. Refill the tank, restore power, and check for leaks around the connection.
Usage recommendations
Inspect the anode rod at regular intervals (typically annually) and replace it when more than 50% consumed or when heavy corrosion is visible. Water chemistry and heater usage affect consumption rate; soft or aggressive water may require more frequent inspection. Follow the heater manufacturer’s safety and maintenance guidelines when installing the anode.

## FAQ

### How much does the Anode rod Biawar 21x510 mm 3/4" (22171) cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 15.07.2026 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 Biawar 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 Biawar 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/11825918/67227520_large.webp