# Straight Adapter SiGMA-Li MZPZ1634 16x3/4" male thread for PEX piping

**URL:** https://aio.lv/en/product--sigma-li-mzpz1634--11825069
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** MZPZ1634
**EAN:** 5902814622025
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-mzpz1634--11825069

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

SiGMA-Li MZPZ1634 is a straight adapter for PEX piping with a 16 mm body and 3/4" male (G) threaded end. Designed for connecting PEX tubes to threaded fittings, it ensures a direct mechanical transition between flexible plastic piping and standard threaded components. Suitable for potable water and heating installations where PEX-to-thread connections are required.

## Long description

SiGMA-Li MZPZ1634 is a straight adapter designed for PEX piping with a 16 mm body and a 3/4" male (G) threaded end. It provides a direct mechanical transition between flexible PEX tubes and standard threaded fittings, enabling reliable connections in potable water and heating systems where a PEX-to-thread interface is required. The adapter is intended for inline installation and for use with common PEX connection methods compatible with the adapter's 16 mm dimension.
Advantages
The straight adapter offers a compact form factor that simplifies connection of 16 mm PEX tubing to 3/4" threaded components without the need for additional adaptors. Its design provides a secure mechanical joint suitable for domestic water supply and heating circuits. Installation is straightforward and intended for compatibility with standard plumbing practices for PEX systems, reducing assembly time and potential leak points when fitted correctly.
Suitable for
Connecting 16 mm PEX tubing to 3/4" threaded valves, manifolds or appliances
Domestic potable water distribution systems
Residential and light commercial heating circuits using PEX piping
Situations requiring conversion from flexible plastic piping to standard threaded fittings
Key specifications
Pipe connection diameter: 16 mm (for PEX tubing)
Thread type and end: 3/4" male (G) threaded connection
Configuration: straight inline adapter for direct transition
Typical applications: potable water and heating systems
Material characteristics: suitable for use with PEX piping (follow installer and material compatibility guidelines)
How to use
Prepare the PEX tube by cutting it square and removing any burrs or deformation. Slide or insert the prepared 16 mm PEX tube onto the adapter according to the selected PEX connection method (crimp, clamp, or push-fit) compatible with the adapter and tube. Tighten the 3/4" male threaded end into the receiving female threaded fitting using appropriate sealing method on the thread (for example, PTFE tape or compatible thread sealant) where required by local codes. Verify the assembly for correct seating and secure fastening before pressurizing the system. Follow all applicable installation standards and manufacturer recommendations for PEX connections and threaded joints.
Usage recommendations
Use the adapter only with PEX tubing of the specified 16 mm dimension and with compatible connection fittings. Ensure thread sealing conforms to local plumbing codes and that materials used in contact with potable water meet regulatory requirements. Inspect fittings after initial pressurization and periodically during service for signs of leakage or loosening.

## FAQ

### How much does the SiGMA-Li MZPZ1634 straight PEX adapter 16x3/4" cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 59 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 29.07.2026 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/11825069/67226889_large.webp