# Connector straight with union nut 16×3/4 for PE-RT pipes SiGMA-Li

**URL:** https://aio.lv/en/product--sigma-li-pertzps1634--11824978
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** PERTZPŚ1634
**EAN:** 5902814622438
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-08-07 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-pertzps1634--11824978

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

Straight connector with union nut for PE-RT piping systems, designed for 16 mm PE-RT pipe and 3/4" threaded fittings. Manufactured by SiGMA-Li, this fitting provides a mechanical junction between PE-RT tubing and threaded components. Suitable for plumbing, underfloor heating and hot water distribution where secure, threaded connections are required.

## Long description

Connector straight with union nut 16×3/4 for PE-RT pipes SiGMA-Li is a mechanical fitting designed to join 16 mm PE-RT tubing to 3/4" threaded components. The fitting provides a straight, compact transition between plastic pipe and metal or threaded elements in plumbing and heating installations. Constructed for applications that require a reliable threaded union, this connector suits systems where PE-RT pipe must interface with valves, manifolds, or other threaded fixtures.
Advantages
This straight connector offers a secure mechanical connection between 16 mm PE-RT pipe and 3/4" threaded fittings without the need for heat or adhesives. Its union nut design enables straightforward assembly and disassembly for maintenance or replacement. Designed for compatibility with common domestic plumbing and underfloor heating installations, the fitting maintains a compact footprint and consistent flow path, reducing pressure loss at the transition point.
Suitable for
Domestic plumbing connections where 16 mm PE-RT pipe meets 3/4" threaded valves or fittings
Underfloor heating manifolds and branch connections using PE-RT tubing
Hot water distribution circuits requiring a threaded union to metal components
Service and maintenance points that need easy disconnection of PE-RT lines
Key specifications
Pipe compatibility: PE-RT, 16 mm outside diameter
Thread size: 3/4" standard threaded connection
Connection type: straight mechanical connector with union nut
Application temperature range: suitable for typical plumbing and underfloor heating service temperatures
Flow orientation: inline straight-through design to minimize flow restriction
How to use
Prepare the PE-RT pipe by cutting a straight, square end and ensure the outer surface is clean and free of burrs. Slide the union nut and any compression or sealing components onto the pipe as required by the fitting design, then insert the pipe fully into the connector body until it seats. Tighten the union nut by hand and finish to the recommended tightening torque with a suitable wrench to create a leak-tight threaded union with the 3/4" fitting. Follow standard plumbing practices and verify alignment before final tightening.
Usage recommendations
Use compatible sealing elements and follow manufacturer's torque guidance where available. Confirm that the selected connector meets system pressure and temperature requirements, and perform a pressure test after installation. For repeated disassembly, inspect sealing surfaces and replace seals if wear or deformation is present.

## FAQ

### How much does the Straight connector SiGMA-Li 16×3/4 for PE-RT 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 — 30 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 27.07.2026 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/11824978/67226812_large.webp