# Reducer coupling SiGMA-Li MZR2516 25x16 PEX plumbing fitting

**URL:** https://aio.lv/en/product--sigma-li-mzr2516--11825232
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SiGMA-Li
**Manufacturer code:** MZR2516
**EAN:** 5902814623770
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 8.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sigma-li-mzr2516--11825232

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

SiGMA-Li MZR2516 is a 25x16 reducer coupling designed for PEX plumbing systems. The fitting connects 25 mm to 16 mm PEX pipes, enabling reliable diameter reduction in water supply and heating installations. Suitable for use in residential and commercial piping, it ensures secure joints in pipe repair, branching, or system modifications.

## Long description

SiGMA-Li MZR2516 25x16 reducer coupling is a PEX plumbing fitting engineered to join 25 mm and 16 mm cross-linked polyethylene (PEX) pipes. The coupling provides a reliable transition between two pipe diameters in water supply and heating systems, allowing for diameter reduction without complex adaptors. Manufactured for typical residential and light commercial installations, this fitting is intended for use where a secure, durable joint between different PEX sizes is required.
Advantages
The reducer coupling is compact and designed to create leak-resistant connections when installed according to PEX system standards. Its simple geometry minimises flow disturbance at the diameter change and supports mechanical strength across the joint. The fitting is compatible with standard PEX installation tools and methods, enabling straightforward replacement, repair, or reconfiguration of piping runs.
Suitable for
Reducing PEX pipe diameter from 25 mm to 16 mm in potable water lines
Connecting supply lines to fixtures or branches requiring smaller pipe sizes
Heating system circuits where section downsizing is necessary
On-site repairs and modifications in residential and commercial plumbing
Key specifications
Material compatibility: cross-linked polyethylene (PEX)
Connection sizes: 25 mm to 16 mm
Function: reducer coupling for diameter transition
Typical applications: potable water and heating distribution
Design: compact inline reducer for pipe-to-pipe joining
How to use
Prepare the PEX pipe ends by cutting square and deburring. Slide the appropriate PEX connection method (such as crimp, clamp, or push-fit compatible components) onto each pipe end following the manufacturer's guidance for the chosen system. Fully insert the 25 mm and 16 mm pipes into the respective ends of the reducer coupling until they reach the stop. Complete the connection using the recommended tool and technique for your PEX system to ensure a secure, sealed joint. After installation, verify alignment and perform pressure testing according to local plumbing codes.
Usage recommendations
Use the reducer coupling only with compatible PEX pipe and fittings, and follow accepted installation practices. Confirm that operating temperatures and pressures of the system fall within the limits of the PEX piping and associated fittings. For long runs or installations subject to mechanical stress, allow for proper support and expansion allowances to maintain joint integrity.

## FAQ

### How much does the Reducer coupling SiGMA-Li MZR2516 25x16 cost, and is it available for purchase?

The price is 10.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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 16.07.2026 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/11825232/67227009_large.webp