# Compression socket fitting SiGMA-Li PERTM16T — welded/heat-fused coupling for 16 mm PE-RT pipe

**URL:** https://aio.lv/en/product--sigma-li-pertm16t--11824999
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Kitchen & Bathroom Faucets
**Manufacturer:** SiGMA-Li
**Manufacturer code:** PERTM16T
**EAN:** 5902837600116
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-25 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-pertm16t--11824999

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Welded socket coupling SiGMA-Li PERTM16T designed for joining 16 mm PE-RT (polyethylene of raised temperature resistance) pipes. This fitting provides a permanent, leak-resistant connection by heat fusion/welding, suitable for potable water and heating installations that use PE-RT piping. Typical uses include underfloor heating, radiator circuits and domestic water supply pipelines.

## Long description

Welded socket coupling SiGMA-Li PERTM16T is a compression/socket fitting engineered for creating permanent, heat-fused joints on 16 mm PE-RT (polyethylene of raised temperature resistance) pipes. Designed for systems that require reliable, leak-resistant connections, this coupling is suitable for potable water and low-temperature heating circuits where PE-RT piping is specified. The fitting forms a continuous polymer bond with the pipe through heat fusion, eliminating mechanical seals and providing a smooth internal bore for minimal flow resistance.
Advantages
The welded/heat-fused design ensures a durable, tamper-resistant joint that resists seepage and reduces the risk of joint failure compared with mechanical compression alternatives. Compatibility with 16 mm PE-RT pipe delivers a consistent fit and predictable thermal behaviour in heating and water supply systems. The coupling's smooth internal profile keeps hydraulic losses low and supports hygienic potable water transport when installed according to standards.
Suitable for
Underfloor heating manifolds and circuits using 16 mm PE-RT pipe
Radiator loop connections in low-temperature heating systems
Domestic potable water supply lines with PE-RT piping
Repair or extension of existing PE-RT installations where a permanent fused joint is required
Key specifications
Pipe compatibility: 16 mm PE-RT (polyethylene of raised temperature resistance)
Connection method: heat fusion / welded socket coupling
Intended media: potable water and low-temperature heating fluids
Joint type: permanent, fusion-welded connection with smooth internal bore
How to use
Prepare the PE-RT pipe by cutting squarely and ensuring the ends are clean and free of debris. Heat the pipe end and the internal surface of the coupling according to the heat-fusion procedure recommended for PE-RT materials and the heating equipment being used. Insert the pipe fully into the coupling to the correct depth and allow the joint to cool under minimal movement to achieve a uniform fusion bond. Follow local codes and the heat-fusion equipment manufacturer's instructions for temperatures, heating times and safety precautions.
Usage recommendations
Use certified heat-fusion tools suitable for PE-RT to ensure consistent joint quality. Verify compatibility of the coupling with the specific PE-RT pipe variant in the installation, and allow adequate cooling time before pressurising the system. For potable water applications follow applicable sanitary and installation standards.

## FAQ

### How much does the SiGMA-Li PERTM16T welded coupling for 16 mm PE-RT 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 — 137 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 14.07.2026 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/11824999/67226832_large.webp