# Onnline PAW HEATBLOC BASIC31 Pump Group DN 25 without Mixer and Pump

**URL:** https://aio.lv/en/product--onnline-4636011--12467839
**Data updated:** 2026-05-18 09:38 (EEST)
**Category:** Heating Radiators
**Manufacturer:** Onnline
**Manufacturer code:** 4636011
**EAN:** 4251401515433
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 75.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 62.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--onnline-4636011--12467839

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Onnline PAW HEATBLOC BASIC31 is a DN 25 pump group designed for efficient heating system distribution. This model is supplied without a mixer and without a circulation pump, allowing for flexible configuration based on specific installation requirements. It provides a reliable solution for managing heating circuits, ensuring optimal flow control and thermal insulation within professional HVAC systems.

## Long description

The Onnline PAW HEATBLOC BASIC31 is a professional-grade DN 25 pump group engineered for efficient heat distribution in hydronic heating systems. This unit serves as a robust foundation for managing heating circuits, providing essential shut-off and flow control capabilities. Designed for versatility, this model is supplied without a mixer and without a circulation pump, offering installers the freedom to select and integrate components that best suit the specific hydraulic requirements of the project.
Advantages
The primary benefit of the Onnline PAW HEATBLOC BASIC31 is its modular and flexible design, which allows for custom configuration of the heating circuit. The unit features high-quality thermal insulation that minimizes heat loss, contributing to the overall energy efficiency of the HVAC system. Its compact construction simplifies installation in tight spaces, while the durable materials ensure long-term reliability and consistent performance in demanding professional heating applications.
Suitable for
Residential and commercial heating system distribution
Systems requiring flexible pump and mixer selection
Hydronic heating circuits with DN 25 piping
Professional HVAC installations where thermal efficiency is critical
When it may not be suitable
This pump group is not suitable for systems that require integrated mixing valves for temperature control, as this model is designed without a mixer. It is also not appropriate for applications requiring a pre-installed circulation pump, as the unit is delivered as a base assembly only.
Key specifications
Nominal diameter: DN 25
Configuration: Without mixer and without circulation pump
Application: Heating system distribution
Thermal insulation: Integrated high-efficiency housing
How to use
To use the Onnline PAW HEATBLOC BASIC31, mount the unit onto the heating manifold or wall bracket according to the system layout. Select a compatible circulation pump that meets the flow and head requirements of your specific heating circuit and install it into the designated space. Connect the supply and return piping to the DN 25 ports, ensuring all seals are properly tightened to prevent leaks. Once the components are installed, verify the integrity of the connections and proceed with system filling and air purging.
What to consider before purchase
Ensure the DN 25 size matches your existing piping infrastructure
Verify that you have a compatible circulation pump available for installation
Confirm whether your system requires a mixing valve, as this model does not include one
Check the space requirements for the compact housing dimensions
Usage recommendations: Always perform a pressure test after installation to ensure all connections are secure. It is recommended to use professional-grade sealing materials and to follow the specific technical guidelines provided by the circulation pump manufacturer to ensure optimal system performance.

## FAQ

### How much does the Onnline PAW HEATBLOC BASIC31 Pump Group DN 25 cost, and is it available for purchase?

The price is 75.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 32 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 14.07.2026 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 Onnline PAW HEATBLOC BASIC31 Pump Group DN 25 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Onnline 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 Onnline 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/12467839/68770305_large.webp