# Fitting SiGMA-Li welded tee 20 mm for PE-RT piping PERTT20

**URL:** https://aio.lv/en/product--sigma-li-pertt20--11825319
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** PERTT20
**EAN:** 5902814627723
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-08-01 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-pertt20--11825319

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Welded tee fitting by SiGMA-Li for PE-RT piping systems, nominal size 20 mm (PERTT20). Designed for creating a branch connection in polyethylene of raised temperature (PE-RT) pipe networks. Suitable for hot and cold water distribution, underfloor heating and plumbing installations; provides a permanent welded joint when used with compatible welding tools and procedures.

## Long description

The SiGMA-Li welded tee 20 mm for PE-RT piping PERTT20 is a polyethylene raised temperature (PE-RT) fitting designed to form a permanent branch connection in piping networks. Intended for use with PE-RT pipe systems, this welded tee creates a stable, leak-resistant joint when installed with appropriate welding equipment and recommended procedures. It is compatible with typical applications in hot and cold water distribution, underfloor heating circuits and general plumbing where a welded branching point is required.
Advantages
This welded tee offers a reliable, long-lasting connection that reduces the risk of leaks compared with mechanical fittings when correctly welded. Its geometry supports smooth internal flow and minimizes pressure loss at the branch. Made for PE-RT systems, the fitting is suitable for repeated thermal cycles and maintains dimensional stability under normal operating temperatures of hot- and cold-water installations.
Suitable for
Hot and cold potable water distribution
Underfloor heating manifolds and branch lines
Residential and light commercial plumbing installations
Permanent welded branching in PE-RT pipe networks
Key specifications
Material: PE-RT (polyethylene for raised temperature applications)
Nominal size: 20 mm branch and run diameters
Connection type: welded joint designed for butt or socket fusion using compatible welding tools
Application temperature range: suitable for typical hot and cold water systems (follow system specifications for exact limits)
Flow characteristic: smooth internal profile to reduce turbulence at the branch
How to use
Prepare pipes and fitting according to the welding tool manufacturer’s instructions: cut pipe ends square, remove burrs, and ensure surfaces are clean and free of contaminants. Align the pipe and tee precisely in the welding fixture, heat to the specified temperature for the material and nominal size, then complete the weld following the recommended heating and cooling times. Verify joint integrity visually and, where applicable, by pressure testing the system in accordance with local regulations and project requirements.
Usage recommendations
Use only welding equipment and parameters approved for PE-RT materials and 20 mm fittings. Store the fitting in a dry, shaded place to avoid contamination prior to installation. For systems carrying potable water or operating at higher temperatures, consult system design guidelines and local standards to confirm compatibility and maximum operating conditions.

## FAQ

### How much does the SiGMA-Li welded tee 20 mm PERTT20 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 — 35 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 20.07.2026 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/11825319/67227070_large.webp