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header-product Valve Top-Therm QSD25 DN 25 — anti-freeze safety valve for heating systems
79.49 €

Valve Top-Therm QSD25 DN 25 — anti-freeze safety valve for heating systems

Top-Therm QSD25 DN 25 anti-freeze valve Photo 1
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Valve Top-Therm QSD25 DN 25 — anti-freeze safety valve for heating systems

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Valve Top-Therm QSD25 DN 25 — anti-freeze safety valve for heating systems

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Short description

Top-Therm QSD25 DN 25 is an anti-freeze safety valve designed for heating systems. Model QSD25 (DN 25) provides protection against freezing by releasing or admitting fluid as system conditions require. Suitable for installation in residential or commercial boiler and radiator circuits to prevent pipe or component damage during low-temperature conditions.
Available for order: 31 pcs.
Warranty: 2 Years
SKU: 11854390
Manufacturer: Top-Therm
free shipment

Cheapest delivery:

Venipak Locker LV

Pick-up points

Venipak Locker LV

Cost

1.89 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
15.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
20.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
Parcel couriers
Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Latvijas Pasts nodaļa
20.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
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3 mth. х 26.5 €

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All payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
36 months installment: from 2.21 euros per month
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Product information

Description

Top-Therm QSD25 DN 25 is an anti-freeze safety valve engineered for heating systems to reduce the risk of pipe and component damage under low-temperature conditions. Designed for use in boiler and radiator circuits, this DN 25 valve operates by releasing or admitting fluid automatically as system pressure and temperature change, helping maintain circulation and prevent freezing without manual intervention.

Advantages

The Top-Therm QSD25 DN 25 offers automatic protection against freezing through reliable pressure- and temperature-responsive operation. Its compact DN 25 form factor fits standard residential and commercial heating installations and requires minimal maintenance due to a straightforward mechanical design. The valve contributes to system longevity by preventing burst pipes and damage to heat exchangers and radiators during cold periods.

Suitable for

  • Residential boiler circuits and radiator loops
  • Commercial heating installations with DN 25 connections
  • Systems requiring passive anti-freeze protection in low ambient temperatures

Key specifications

  • Nominal diameter: DN 25
  • Function: anti-freeze / safety valve for heating systems
  • Operating principle: automatic pressure/temperature-responsive opening and closing to admit or release fluid
  • Installation type: in-line connection suitable for standard heating circuits
  • Typical applications: boiler and radiator circuits in residential and commercial systems

How to use

Install the valve in the heating circuit at a location recommended by the heating system designer or installer, ensuring correct flow orientation and secure connections to DN 25 pipework. The device works automatically: under low-temperature or altered pressure conditions it will release or admit fluid as required to prevent freezing. Regular visual checks and periodic inspection during service intervals are recommended to confirm correct operation and tight connections.

Usage recommendations

Ensure installation is performed by a qualified technician familiar with local regulations and heating system layouts. Verify compatibility with system fluids and operating pressures before fitting. During commissioning and winter months, include the valve in routine maintenance checks to confirm functionality and to prevent obstruction from debris or corrosion.

Description

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Customer reviews

Customer questions

FAQ

How much does the Top-Therm QSD25 DN 25 anti-freeze valve cost, and is it available for purchase?

The price is 79.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 31 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, Installment. All transactions are 100% secure and encrypted.

Can Top-Therm QSD25 DN 25 anti-freeze valve be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Top-Therm QSD25 DN 25 anti-freeze valve online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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 Top-Therm 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 Top-Therm 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.