# Alkotest MK20 PEX elbow 20x20 mm for Sigma-LI piping (MK20)

**URL:** https://aio.lv/en/product--alkotest-mk20--11822709
**Data updated:** 2026-03-09 11:11 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Alkotest
**Manufacturer code:** MK20
**EAN:** 5901171120182
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.99 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 9.08 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alkotest-mk20--11822709

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

Alkotest MK20 is a PEX elbow fitting designed for Sigma-LI piping systems. Sized 20x20 mm, this 90° connector provides a compact joint for changing pipe direction in plumbing and heating installations. Suitable for use with PEX tubing in residential and light commercial applications, it enables secure, space-saving turns in water and heating circuits.

## Long description

Alkotest MK20 PEX elbow 20x20 mm for Sigma-LI piping (MK20) is a 90° PEX fitting engineered to change direction in plumbing and heating circuits where space is limited. The compact 20x20 mm dimensions make it suitable for tight installations and for use with Sigma-LI compatible PEX tubing in residential and light commercial systems. The elbow provides a sealed joint designed for reliable water and heating flow redirection.
Advantages
The elbow offers a compact footprint and straightforward installation, reducing the need for additional space when routing pipes. Constructed to fit PEX tubing, it ensures a stable connection for potable water and heating circuits with minimal risk of leaks when installed correctly. Its 90° geometry simplifies layout changes and allows cleaner pipe runs in corners and junctions.
Suitable for
 Changing pipe direction in residential PEX water supply systems
 Routing heating circuit pipes in compact or confined spaces
 Plumbing installations using Sigma-LI compatible PEX tubing
 Light commercial water and heating distribution
Key specifications
 Angle: 90° elbow for directional change
 Connection type: PEX-compatible push or compression connection for 20 mm pipes
 Size: 20 x 20 mm nominal dimensions
 Application: potable water and heating systems
 Compatibility: designed for Sigma-LI PEX piping systems
How to use
Prepare the PEX tubing by cutting squarely and deburring the end. Insert the prepared pipe into the elbow until it seats fully according to the Sigma-LI system guidance. Secure the connection using the recommended method for the system (crimp, clamp, or push-fit as appropriate). Verify alignment and ensure the elbow is oriented for a 90° turn. After assembly, pressurize the system and inspect the joint for leaks before completing insulation or concealment.
Usage recommendations
Use with PEX tubing of the specified diameter and follow Sigma-LI installation guidelines. Avoid excessive bending near the connection and allow space for tool access when applying clamps or crimps. Conduct a pressure test after installation and periodically inspect accessible joints for integrity.

## FAQ

### How much does the Alkotest MK20 PEX elbow 20x20 mm cost, and is it available for purchase?

The price is 10.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 187 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 29.07.2026 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 Alkotest 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 Alkotest 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/11822709/67224762_large.webp