# Differential valve for central heating FERRO ZR1 1" for radiator and boiler systems

**URL:** https://aio.lv/en/product--ferro-zr1--11836181
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Heating Radiators
**Manufacturer:** FERRO
**Manufacturer code:** ZR1
**EAN:** 5901095641282
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ferro-zr1--11836181

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

FERRO ZR1 differential valve for central heating, 1" connection. Designed to balance pressure differences and protect radiator and boiler circuits in domestic heating installations. Suitable for use in hot-water central heating to reduce hydraulic noise, prevent unwanted flow and improve system stability. Simple inline installation in return or supply piping.

## Long description

FERRO ZR1 differential valve for central heating with a 1" connection is designed for use in domestic hot-water heating systems to balance pressure differences between radiator and boiler circuits. The valve reduces hydraulic noise, prevents unwanted flow through radiators or bypass lines and improves overall system stability. It is suitable for inline installation in either return or supply piping and is compatible with standard residential heating components.
Advantages
The differential valve provides automatic pressure balancing across heating circuits, limiting flow when differential pressure drops below a set threshold and allowing flow when needed. Its compact inline design enables straightforward integration into existing pipework without major modifications. By stabilizing flow and pressure, the valve contributes to quieter operation and can reduce wear on pumps and control valves. The device is made for hot-water central heating and is compatible with common radiator and boiler system layouts.
Suitable for
Balancing pressure between boiler and radiator circuits in residential central heating
Reducing hydraulic noise and preventing unwanted cross-flow in radiators
Protecting pumps and thermostatic control valves from rapid pressure fluctuations
Inline fitting in return or supply piping of hot-water heating systems
Key specifications
Connection size: 1 inch
Application: hot-water central heating systems
Function: automatic differential pressure balancing
Mounting: inline installation in supply or return pipework
Compatibility: designed for standard residential radiator and boiler circuits
How to use
Install the differential valve inline in the chosen section of the supply or return pipe according to the flow direction indicated on the valve body. Ensure piping is depressurized and drained before fitting. Secure proper thread sealing and torque to avoid leaks, then restore system pressure and check for correct operation. The valve operates automatically to limit or permit flow based on differential pressure; no electrical connection or manual adjustment is required for basic operation. Regular inspection during routine system maintenance is recommended to confirm free movement and absence of debris.
Usage recommendations
Use the FERRO ZR1 differential valve in systems with appropriate pipe and pump sizing to achieve intended pressure differential ranges. During commissioning, verify system pressure and pump settings to ensure the valve functions within its designed operating conditions. If sediment or water quality issues are present, consider installing filters or strainers upstream to prolong valve life.

## FAQ

### How much does the Differential valve FERRO ZR1 1" cost, and is it available for purchase?

The price is 14.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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 08.07.2026 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

https://aio.lv/img/cache/product/11836181/67235870_large.webp