# Compression coupler REHAU RAUTITAN 25×16 mm PPSU straight fitting

**URL:** https://aio.lv/en/product--rehau-11600421001--11824991
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** REHAU
**Manufacturer code:** 11600421001
**EAN:** 4007360376888
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rehau-11600421001--11824991

## 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 compression coupler REHAU RAUTITAN designed for connecting 25 mm to 16 mm pipes. Made from PPSU (polyphenylsulfone) for chemical and thermal resistance, the fitting features a push-in/compression connection with sealing elements and a threaded nut for secure installation. Suitable for potable water and heating systems in residential and commercial plumbing.

## Long description

Compression coupler REHAU RAUTITAN 25×16 mm PPSU straight fitting is a transition fitting designed to join a 25 mm pipe to a 16 mm pipe in potable water and heating systems. Manufactured from PPSU (polyphenylsulfone), the straight fitting offers chemical and thermal resistance suitable for domestic and commercial plumbing installations. The connector uses a push-in/compression principle with elastomeric sealing elements and a threaded nut to secure a reliable joint without soldering or adhesive.
Advantages
The PPSU construction provides long-term resistance to elevated temperatures and common plumbing chemicals while retaining mechanical strength. The compression/push-in system allows quick assembly and disassembly for repairs or modifications, and the threaded nut ensures a tight mechanical clamp for leak-free operation when installed according to instructions. The compact straight design facilitates space-saving routing in manifolds, distribution lines and behind fixtures.
Suitable for
 Connecting 25 mm to 16 mm plastic or composite pipes in potable water systems
 Transition fittings in domestic and light commercial heating circuits
 Repairs, retrofits and branch connections in confined installation spaces
Key specifications
 Material: PPSU (polyphenylsulfone) body for thermal and chemical resistance
 Connection type: compression / push-in with threaded nut and sealing elements
 Pipe sizes: 25 mm to 16 mm transition
 Geometry: straight coupler for inline connections
 Application: potable water and heating systems in residential and commercial buildings
How to use
Ensure pipe ends are cut square, deburred and free of dirt or mechanical damage. Slide the threaded nut and any required support sleeve over the pipe where applicable, then insert the pipe into the fitting until it seats against the internal stop. Tighten the threaded nut by hand and then to the manufacturer’s recommended torque using an appropriate wrench to compress the sealing elements. After assembly, pressurize the system and inspect the joint for leaks; if necessary, retighten within permitted torque limits. For disassembly, depress any release mechanism if present and unscrew the nut to withdraw the pipe.
Usage recommendations
Use the fitting only with compatible pipe materials and within the system’s rated temperature and pressure ranges. Follow local plumbing codes and the REHAU installation guidelines for sealing, torque values and support spacing to ensure long-term performance. Avoid exposure to aggressive solvents or prolonged UV if the fitting is installed in unprotected outdoor locations.

## FAQ

### How much does the REHAU RAUTITAN straight coupler 25×16 mm PPSU 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 — 131 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 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/11824991/67226824_large.webp