# Straight PEX Fitting SiGMA-Li MZPW251 — 25 x 1 mm female threaded connector

**URL:** https://aio.lv/en/product--sigma-li-mzpw251--11824987
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** MZPW251
**EAN:** 5902814623688
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 10.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-mzpw251--11824987

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

SiGMA-Li MZPW251 is a straight PEX connector designed for joining 25 mm piping with a 1 mm (25 x 1) female threaded interface. Intended for use in plumbing and heating systems, this fitting provides a secure transition between PEX tubing and threaded components such as valves or fixtures. Suitable for domestic and light commercial installations where PEX-to-thread connections are required.

## Long description

SiGMA-Li MZPW251 is a straight PEX fitting engineered to connect 25 mm cross-linked polyethylene (PEX) piping to a 1 mm female threaded component. The connector creates a watertight transition between PEX tubing and threaded valves, adapters or fixtures, and is intended for plumbing and heating systems in residential and light commercial applications. The body and connection surfaces are designed to align with standard PEX installation practices and to provide a compact, inline joint that preserves flow characteristics.
Advantages
The straight PEX fitting offers a reliable mechanical seal suitable for pressurized potable water and heating circuits when installed according to recommended methods. Its straight design minimises pressure drop and makes alignment straightforward during installation. The female threaded interface allows direct attachment to threaded components without additional adapters, reducing installation time and potential leak points. Materials and dimensions are selected to match common 25 mm PEX pipe sizes for consistent fit and performance.
Suitable for
Connecting 25 mm PEX tubing to 1 mm female threaded valves and fixtures
Domestic potable water distribution systems
Underfloor heating manifolds and heating circuits in light commercial settings
Repair or retrofit where a PEX-to-threaded connection is required
Key specifications
Compatibility: 25 mm cross-linked polyethylene (PEX) pipe
Thread type: female threaded connection with 1 mm nominal thread size
Geometry: straight inline fitting for axial connections
Application: potable water and heating installations
Installation method: mechanical compression/insert style suitable for standard PEX joining techniques
How to use
Prepare the PEX pipe by cutting squarely and deburring the end. Slide any required ferrule or compression sleeve onto the pipe, then insert the supplied or compatible PEX insert until the pipe seats fully. Engage the fitting body onto the prepared pipe according to the manufacturer's joining procedure and tighten the female threaded connection to the mating component with appropriate tools, ensuring not to exceed recommended torque values. After assembly, check the connection for leaks by pressurising the system and visually inspecting the joint.
Usage recommendations
Use this fitting only with compatible 25 mm PEX tubing and threaded components of matching thread form. Follow local plumbing codes and manufacturer installation instructions. Where accessible, apply thread sealant or tape on the threaded interface as required by the specific valve or fixture manufacturer. Verify system pressure and perform a leak test before concealing the installation.SiGMA-Li MZPW251 — 25 x 1 mm female threaded connector

## FAQ

### How much does the SiGMA-Li MZPW251 PEX straight fitting 25 x 1 cost, and is it available for purchase?

The price is 12.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 13.07.2026 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

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