# Elbow 45° SiGMA-Li PP 25 mm BOR Plus K4525 — polypropylene pipe fitting

**URL:** https://aio.lv/en/product--sigma-li-k4525--11826778
**Data updated:** 2026-03-09 11:16 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** K4525
**EAN:** 5902814625262
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 2.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-k4525--11826778

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.99 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

SiGMA-Li PP 25 mm 45° BOR Plus K4525 is a polypropylene (PP) elbow pipe fitting designed to change pipe direction by 45 degrees for 25 mm diameter systems. Intended for use in plumbing and heating installations, it provides a corrosion-resistant, lightweight joint for potable water, heating circuits, and general fluid distribution. Suitable for welding or socket connections per system requirements.

## Long description

SiGMA-Li PP 25 mm 45° BOR Plus K4525 is a polypropylene elbow designed to change the direction of a 25 mm pipe run by 45 degrees. It is intended for plumbing and heating systems where a resistant, lightweight plastic fitting is required. The fitting is compatible with systems that use PP socket or weld connections and is suitable for potable water, heating circuits and general fluid distribution. The smooth internal surface reduces flow resistance and deposits, while the polymer construction provides chemical and corrosion resistance compared with metal alternatives.
Advantages
The polypropylene construction ensures low weight and resistance to corrosion and many common chemicals, while maintaining stable dimensions under normal operating temperatures for domestic plumbing and heating. The 45° angle allows more gradual directional changes than 90° elbows, reducing pressure loss and turbulence in the flow. The fitting is compatible with standard 25 mm PP connection methods and can be welded or joined by sockets according to the installation system used. Its smooth bore and uniform wall thickness support reliable flow characteristics and simplified installation.
Suitable for
Potable water distribution in residential and commercial buildings
Central heating circuits and radiator connections
Domestic hot and cold water installations
General fluid distribution in non-aggressive media
Key specifications
Material: polypropylene (PP)
Nominal diameter: 25 mm
Angle: 45° elbow
Connection method: socket/weld compatible with PP systems
Application temperature range: suitable for typical domestic plumbing and heating (check system requirements)
Internal surface: smooth bore to reduce flow resistance
How to use
Select the appropriate joint method for the SiGMA-Li PP 25 mm 45° elbow according to the installation system—socket fusion or welding where applicable. Prepare mating pipe ends by cutting square, deburring and cleaning surfaces to ensure proper fit and reliable joints. Assemble and execute fusion or socket connections following the equipment and material manufacturer instructions and local plumbing standards. After installation, inspect joints and perform pressure testing of the circuit as required to verify leak-free connections.
Usage recommendations
Use fittings made of polypropylene only within the temperature and pressure limits specified by the overall system design; avoid exposure to aggressive chemicals outside PP compatibility and follow local plumbing codes for potable water and heating systems. Store components in a dry, shaded area to prevent UV degradation before installation.

## FAQ

### How much does the Elbow 45° SiGMA-Li PP 25 mm K4525 cost, and is it available for purchase?

The price is 3.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 645 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 10.07.2026 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/11826778/67228223_large.webp