# Thermostatic radiator valve pack FERRO ZTM21 GT20 1/2" angled

**URL:** https://aio.lv/en/product--ferro-ztm21--5297720
**Data updated:** 2026-03-07 15:14 (EET)
**Category:** Heating Radiators
**Manufacturer:** FERRO
**Manufacturer code:** ZTM21
**EAN:** 5902194940948
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ferro-ztm21--5297720

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

FERRO ZTM21 thermostatic radiator valve pack with GT20 angled 1/2" connection. The set is designed for temperature regulation on radiators, offering thermostatic control at the valve inlet. Suitable for use in residential and commercial heating systems where compact angled connections are required. Includes valve components compatible with standard 1/2" radiator fittings.

## Long description

FERRO ZTM21 thermostatic radiator valve pack with GT20 angled 1/2" connection provides thermostatic control at the valve inlet for radiator heating circuits. The set is intended for temperature regulation in residential and commercial heating systems where a compact angled connection is required. Components are compatible with standard 1/2" radiator fittings and designed to integrate with common central heating installations.
Advantages
The FERRO ZTM21 GT20 angled valve pack enables automatic temperature control at the radiator, reducing overheating and improving comfort. Its angled 1/2" connection saves space and simplifies installation in confined locations. The components are manufactured to suit standard radiator fittings, offering reliable mechanical compatibility and straightforward replacement of existing angled valves. The thermostatic function allows proportional control of flow based on the sensed temperature, contributing to energy-efficient operation when used with compatible thermostatic heads.
Suitable for
 Domestic radiator temperature control in apartments and houses
 Commercial heating systems with compact installation requirements
 Replacement of existing angled 1/2" radiator valves
 Hydronic systems where thermostatic inlet regulation is preferred
Key specifications
 Connection type: angled
 Thread size: 1/2" compatible with standard radiator fittings
 Control type: thermostatic valve pack for inlet temperature regulation
 Application: radiator heating circuits in residential and commercial buildings
 Compatibility: designed for use with standard thermostatic heads and valves
How to use
Install the FERRO ZTM21 GT20 angled valve pack in place of the existing radiator valve or as part of a new radiator installation, ensuring the angled 1/2" connection aligns with the radiator and pipework. Tighten connections according to plumbing best practices and bleed the radiator after installation to remove trapped air. Attach a compatible thermostatic head to enable automatic temperature regulation; set the desired temperature on the head and allow the valve to modulate flow based on sensed room conditions. Regular inspection and occasional maintenance of connections and moving parts will help sustain reliable operation.
Usage recommendations
Use with compatible thermostatic heads and follow manufacturer guidance for installation torques and sealing methods. For system commissioning, balance radiators and purge air from the system to ensure correct thermostatic performance. In hard water areas or aggressive water chemistry, consider system treatment to reduce potential valve wear.

## FAQ

### How much does the Thermostatic radiator valve FERRO ZTM21 GT20 1/2" cost, and is it available for purchase?

The price is 17.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 46 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 06.07.2026 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 FERRO 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 FERRO 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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