# Reducer SiGMA-Li R4025 40x25 mm pipe fitting

**URL:** https://aio.lv/en/product--sigma-li-r4025--11826680
**Data updated:** 2026-03-09 11:16 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** R4025
**EAN:** 5902814626443
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-r4025--11826680

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 31.07.2026 | free |
| Pickup points | 05.08.2026 | 1.89 EUR |
| Courier delivery to door | 05.08.2026 | 4.99 EUR |

## Summary description

SiGMA-Li R4025 is a pipe reducer for connecting 40 mm to 25 mm diameter pipes. The fitting provides a transitional coupling between two pipe sizes, enabling secure fluid or conduit connections in plumbing, heating, or irrigation systems. Compatible with standard pipe installation methods, it is used where diameter reduction is required for flow control or system integration.

## Long description

SiGMA-Li R4025 40x25 mm pipe fitting is a reducer designed to join a 40 mm diameter pipe to a 25 mm diameter pipe. The fitting provides a smooth transition between two pipe sizes for plumbing, heating, irrigation, and other fluid or conduit systems. Manufactured for compatibility with standard installation methods, this reducer supports stable mechanical connection and consistent flow when a change of diameter is required.
Advantages
The reducer ensures reliable mechanical coupling between different pipe diameters while minimizing turbulence and pressure loss at the junction. Its geometry is optimized to provide a compact connection that occupies minimal space in piping runs. The fitting is suitable for common installation techniques and assists in maintaining a secure seal when used with appropriate joining materials and methods.
Suitable for
Plumbing systems where a diameter change is required
Heating and radiator connections with mixed pipe sizes
Irrigation networks adapting main lines to branch lines
Retrofitting and repair works that involve size transitions
Key specifications
Connection sizes: 40 mm to 25 mm
Function: concentric reducer for diameter transition
Application areas: plumbing, heating, irrigation, conduit routing
Installation: compatible with standard pipe joining methods
Form factor: inline reducer compatible with compact installations
How to use
Prepare both pipe ends by cleaning and, if required by the material, deburring or chamfering to ensure full insertion. Position the reducer so the larger end receives the 40 mm pipe and the smaller end receives the 25 mm pipe. Secure the joint following the chosen installation method (for example, solvent welding, mechanical coupling, compression fitting, or suitable adhesive/sealant) and verify alignment. After assembly, test the connection under working conditions to confirm there are no leaks and that flow is as expected.
Usage recommendations
Use joining materials and methods that match the pipe material and operating conditions. Verify pressure and temperature limits of the connected system and ensure compatibility of seals and adhesives. For long-term reliability, inspect reducer joints periodically and re-tighten or replace seals if signs of wear or leakage appear.

## FAQ

### How much does the Reducer SiGMA-Li R4025 40x25 mm cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 131 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 31.07.2026 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 SiGMA-Li 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 SiGMA-Li 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/11826680/67228152_large.webp