# REHAU plumbing straight coupling RAUTITAN PPSU 25×20 mm

**URL:** https://aio.lv/en/product--rehau-11600431001--11825028
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** REHAU
**Manufacturer code:** 11600431001
**EAN:** 4007360375805
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-08-11 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rehau-11600431001--11825028

## 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

Straight coupling by REHAU for RAUTITAN piping systems, made of PPSU. Designed to join 25 mm to 20 mm pipe sections, providing a durable mechanical connection for potable water and heating installations. Suitable for use in plumbing, radiator, and underfloor heating applications where a reliable transition between pipe diameters is required.

## Long description

REHAU plumbing straight coupling RAUTITAN PPSU 25×20 mm is a reducer coupling designed for RAUTITAN piping systems. Manufactured from PPSU, it creates a mechanical connection between 25 mm and 20 mm pipe sections and is intended for potable water and heating installations. The coupling provides a compact transition between different pipe diameters and is compatible with RAUTITAN fittings and pipes used in plumbing, radiator and underfloor heating systems.
Advantages
The PPSU material offers high mechanical strength, chemical resistance and dimensional stability at elevated temperatures, ensuring reliable performance in hot water and heating circuits. The straight reducer design enables a smooth hydraulic transition with minimal flow disturbance. The coupling is produced to match RAUTITAN system tolerances, which simplifies installation and reduces the need for additional sealing components. Its compact form factor is suitable for confined installation spaces.
Suitable for
 Joining 25 mm to 20 mm RAUTITAN pipes in potable water systems
 Transitions in radiator and convector connections
 Connections within underfloor heating manifolds and branch runs
 Plumbing repairs and retrofit works where diameter reduction is needed
Key specifications
 Material: PPSU (polyphenylsulfone)
 Connection type: straight reducer mechanical coupling for RAUTITAN system
 Pipe diameters: 25 mm to 20 mm
 Application: potable water and heating installations
 Temperature resistance: suitable for hot water and heating temperatures (system-dependent)
 Compatibility: designed for RAUTITAN piping components
How to use
Prepare both pipe ends by cutting squarely and removing burrs or sharp edges. Verify that pipe dimensions and fittings correspond to RAUTITAN system specifications. Insert the 25 mm and 20 mm pipe ends into the respective sides of the coupling until they reach the stop or required insertion depth. Follow RAUTITAN installation guidance to secure the mechanical connection—this may involve pressing, crimping or inserting according to the system's recommended assembly method. After assembly, perform a pressure test according to applicable regulations and project requirements to confirm leak-free operation.
Usage recommendations
Use this coupling only within RAUTITAN systems and with compatible RAUTITAN pipes and installation tools. Observe system installation manuals and building codes for maximum operating pressures and temperatures. For long-term reliability, avoid exposing the coupling to aggressive chemicals outside normal potable water and heating media, and ensure proper support and alignment of connected pipe runs to prevent mechanical stress.

## FAQ

### How much does the REHAU RAUTITAN PPSU straight coupling 25×20 mm cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 65 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 REHAU 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 REHAU 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/11825028/67226857_large.webp