# Straight coupling with union SiGMA-Li PERTZPŚ2034 — 20 x 3/4 for PE-RT pipelines

**URL:** https://aio.lv/en/product--sigma-li-pertzps2034--11825450
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** PERTZPŚ2034
**EAN:** 5902814622445
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-pertzps2034--11825450

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

Straight coupling with union from SiGMA-Li, model PERTZPŚ2034, designed for connecting 20 mm PE-RT pipes to a 3/4‑inch threaded fitting. The metal/plastic union-style coupling provides a secure mechanical connection for plumbing and heating systems using PE-RT piping. Suitable for domestic and light commercial installations requiring a reliable transition to threaded fixtures.

## Long description

Straight coupling with union SiGMA-Li PERTZPŚ2034 — 20 x 3/4 is a union-style transition fitting designed to connect 20 mm PE-RT tubing to a 3/4-inch threaded fixture. The coupling combines metal and engineering-grade plastic components to provide a mechanically secure connection between flexible PE-RT pipeline and threaded valves, manifolds or appliances. It is intended for plumbing and low-temperature heating systems where a robust, leak-resistant transition from polymer pipe to threaded hardware is required.
Advantages
The metal/plastic union design allows straightforward assembly and disassembly without damaging the pipe, while the union nut provides a tight seal under normal operating pressures. Compatibility with 20 mm PE-RT pipes makes the coupling suitable for common domestic and light commercial installations. Durable materials resist corrosion and mechanical wear, and the fitting is designed for reliable performance when joining polymer piping to standard 3/4-inch threaded connections.
Suitable for
 Connecting 20 mm PE-RT pipe to 3/4-inch threaded valves and fixtures
 Domestic plumbing systems including potable water lines
 Low-temperature underfloor heating and radiator circuits
 Serviceable connections where periodic disassembly may be needed
Key specifications
 Pipe compatibility: PE-RT, 20 mm outer diameter
 Threaded end: 3/4-inch male/female threaded fitting (union connection)
 Construction: combined metal and engineering plastic components
 Connection type: union-style mechanical coupling for push-on/insert pipe with compression/united sealing
 Intended use: plumbing and low-temperature heating systems
How to use
Prepare the PE-RT pipe by cutting it square and deburring the end. Slide the union nut and any internal sealing components onto the pipe according to the manufacturer's orientation. Insert the pipe fully into the coupling until it seats against the internal stop. Tighten the union nut by hand and then with a suitable wrench to the recommended torque; avoid over-tightening. Connect the 3/4-inch threaded end to the mating threaded fixture using appropriate sealing material on the thread if required by the installation practice. After assembly, pressurize the system and inspect for leaks at the union and threaded connection points.
Usage recommendations
Use with 20 mm PE-RT pipe only and follow pipe manufacturer guidelines for bending radius and support. Do not exceed the operating temperature and pressure limits applicable to PE-RT piping systems. If repeated disassembly is expected, inspect sealing surfaces and replace any elastomeric seals showing wear. When connecting to potable water systems, ensure components and any thread sealant comply with local regulations.

## FAQ

### How much does the Straight coupling SiGMA-Li PERTZPŚ2034 20x3/4 cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 53 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 22.07.2026 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/11825450/67227157_large.webp