# Fitting SiGMA-Li welded reducing tee 20x16 PE-RT for plumbing and heating

**URL:** https://aio.lv/en/product--sigma-li-perttr2016t--11825208
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** PERTTR2016T
**EAN:** 5902837600055
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-perttr2016t--11825208

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Welded reducing tee SiGMA-Li 20x16 in PE-RT material, designed for connecting pipes with 20 mm main run and 16 mm branch. Suitable for hot and cold water distribution, underfloor heating and plumbing systems. Provides a leak-resistant welded joint when used with appropriate welding/heat fusion equipment. Intended for professional installation in residential and commercial projects.

## Long description

The SiGMA-Li welded reducing tee 20x16 PE-RT is a pressure pipe fitting designed for joining a 20 mm main run with a 16 mm branch in plumbing and heating systems. Made from PE-RT material, this reducing tee is intended for hot and cold water distribution and underfloor heating installations. The fitting is produced for welded/heat-fusion connection methods and provides a monolithic, leak-resistant joint when correctly welded to compatible PE-RT pipes.
Advantages
The welded reducing tee offers reliable hydraulic continuity and reduced risk of leaks compared with mechanical compression joints when installed using proper fusion equipment. PE-RT construction provides good thermal stability and flexibility, allowing easier routing and bending during installation. The reducing profile enables a compact branch connection where a transition from a 20 mm main line to a 16 mm service line is required, saving space in manifolds and concealed installations.
Suitable for
Hot and cold water distribution systems in residential and commercial buildings
Underfloor heating networks where a 20 mm feed must supply 16 mm loops
Plumbing risers and concealed installations requiring compact branch connections
Key specifications
Main pipe connection diameter: 20 mm
Branch pipe connection diameter: 16 mm
Material: PE-RT (polyethylene of raised temperature resistance)
Connection method: welded/heat-fusion joint
Application: potable water and heating circuits
Suitable temperature range: suitable for typical domestic hot water and underfloor heating temperatures when used within system design limits
How to use
Prepare pipe ends by cutting square and removing any burrs, then clean and align pipes to the reducing tee. Use appropriate welding or heat-fusion equipment specified for PE-RT to perform the joint according to equipment and system manufacturer instructions. Ensure correct heating time and fusion pressure to obtain a homogeneous weld. After cooling, verify the joint integrity by pressure testing the system in accordance with applicable installation standards and local regulations.
Usage recommendations
Use the SiGMA-Li reducing tee only with compatible PE-RT pipes and approved heat-fusion tools; avoid mechanical fittings on fusion ends. Follow local plumbing codes and manufacturer guidance for maximum operating temperatures and pressures, and perform pressure tests after installation to confirm leak-free joints.

## FAQ

### How much does the SiGMA-Li welded reducing tee 20x16 PE-RT cost, and is it available for purchase?

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 60 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 15.07.2026 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/11825208/67226990_large.webp