# Radiator valve Herz 1/2" straight (ligeløbende) model 1552321, 1/2 inch connection

**URL:** https://aio.lv/en/product--herz-1552321--12258279
**Data updated:** 2026-04-14 22:30 (EEST)
**Category:** Heating Radiators
**Manufacturer:** Herz
**Manufacturer code:** 1552321
**EAN:** 9004174500404
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 20.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 17.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--herz-1552321--12258279

## 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 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Herz 1/2" straight radiator valve (model 1552321) is a plumbing fitting for connecting and regulating flow to radiators. With a 1/2-inch threaded connection, it provides manual control of hot water flow to the radiator and is suitable for central heating systems. Typical use includes replacement or installation on domestic and commercial radiators where a compact straight valve is required.

## Long description

Herz 1/2" straight radiator valve (model 1552321) is a compact plumbing fitting designed for connecting and regulating the flow of hot water to radiators in central heating systems. The valve features a 1/2-inch threaded straight connection and is intended for manual adjustment of flow, making it suitable for standard radiator installations that require a simple, reliable shut-off and flow control solution.
Advantages
The Herz 1/2" straight radiator valve offers straightforward manual control of radiator flow with a compact straight design that fits tight installation spaces. Constructed for use in hot water central heating systems, it provides stable and predictable operation for balancing room temperatures and isolating radiators during maintenance. Its standardized connection size ensures compatibility with common radiator fittings.
Suitable for
 Domestic and commercial radiators with 1/2" threaded inlet
 Replacement of existing straight radiator valves
 New radiator installations in compact or confined spaces
 Systems requiring manual flow control and isolation for maintenance
When it may not be suitable
This straight manual valve may not be suitable where thermostatic control is required; thermostatic radiator valves or motorized actuators are needed if automatic temperature regulation is desired. It also may not be the right choice for systems with non-standard or larger threaded connections without adapters.
Key specifications
 Connection type: straight threaded connection
 Connection size: 1/2 inch (threaded)
 Function: manual flow control and isolation for radiators
 Application: hot water central heating systems
 Design: compact straight valve body suitable for confined installs
How to use
Install the valve onto the radiator inlet by matching the 1/2" threaded connection and ensuring a tight, leak-free seal with appropriate sealing material (thread tape or joint compound) where required. Use the valve spindle or handle to open or close the flow to the radiator and adjust flow rate manually to balance heating. For maintenance, fully close the valve to isolate the radiator before draining or disconnecting. Installation and adjustment should follow local plumbing codes and best practices; consider using a qualified installer if unsure.
What to consider before purchase
 Confirm radiator inlet thread size is 1/2" to ensure compatibility
 Decide whether manual control meets your needs or if a thermostatic valve is preferred
 Check available space for a straight valve installation versus angled alternatives
 Ensure materials and pressure/temperature ratings match your heating system requirements
Usage recommendations
For reliable performance, install the valve with correct sealing and ensure regular inspection for leaks. Use manual adjustments to balance rooms and fully close the valve before any radiator servicing. Where automatic temperature control is required, pair the radiator with a thermostatic head instead of a manual straight valve.

## FAQ

### How much does the Herz radiator valve 1/2" straight 1552321 cost, and is it available for purchase?

The price is 20.99 € (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 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 Herz 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 Herz 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/12258279/68534309_large.webp