# Transition coupling Unidelta 40mm x 5/4" PE female thread (model 601640)

**URL:** https://aio.lv/en/product--unidelta-601640--11834138
**Data updated:** 2026-03-09 14:46 (EET)
**Category:** Garden Irrigation
**Manufacturer:** Unidelta
**Manufacturer code:** 601640
**EAN:** 8030884000744
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unidelta-601640--11834138

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Unidelta transition coupling model 601640 is a polyethylene (PE) fitting with a 40 mm pipe connection and a 5/4" (1¼") female threaded end. Designed to join PE piping to threaded fixtures or components, it provides a secure mechanical and threaded interface for water and utility lines. Suitable for plumbing, irrigation, and outdoor installations where a PE-to-thread transition is required.

## Long description

Unidelta transition coupling 40mm x 5/4" PE female thread (model 601640) is a polyethylene (PE) fitting designed to connect 40 mm PE pipe to a 5/4" (1¼") female threaded fixture. The coupling provides a secure mechanical connection between PE piping systems and threaded components used in water supply, irrigation networks, and other utility lines where a PE-to-thread transition is required. Constructed from durable PE material, the fitting resists corrosion and is intended for outdoor and underground installations compatible with standard PE pipe dimensions.
Advantages
This Unidelta coupling offers a simple and reliable transition from PE pipe to a threaded connection without the need for additional adapters. Its polyethylene construction ensures chemical resistance and low susceptibility to corrosion compared with metal alternatives. The integrated female thread provides a standardized connection point for compatible threaded valves, hydrants, or fittings, enabling straightforward assembly and maintenance of plumbing or irrigation lines.
Suitable for
Connecting 40 mm PE piping to 5/4" (1¼") threaded valves or fittings
Irrigation systems and garden water distribution
Outdoor water supply lines and utility conduits
Temporary or permanent plumbing transitions between PE and threaded components
Key specifications
Material: Polyethylene (PE)
Pipe connection diameter: 40 mm
Thread type: Female threaded end sized for 5/4" (1¼")
Application: Water and utility lines, irrigation and outdoor plumbing
Installation environment: Suitable for above-ground and buried installations where compatible with local codes
How to use
Prepare the PE pipe by cutting a clean, square end and deburring the inner and outer edges. Insert the 40 mm PE pipe into the coupling to the required depth, ensuring a straight alignment. Secure the mechanical connection according to the coupling's assembly method for Unidelta fittings (for example, with appropriate compression or electrofusion technique if applicable) and tighten the female threaded connection to the mating male-threaded component using suitable thread sealant or tape where recommended for the service. Verify the joint for leaks and perform a pressure test in accordance with local installation standards.
Usage recommendations
Use the coupling only with compatible 40 mm PE pipe and a matching 5/4" male threaded counterpart. Ensure that thread sealants and tightening torques are appropriate for plastic-to-metal or plastic-to-plastic connections to avoid over-stressing the fitting. Follow local plumbing codes and Unidelta installation instructions for depth, backfill, and pressure testing when used in buried applications.

## FAQ

### How much does the Unidelta transition coupling 40mm x 5/4" (601640) cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 23 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 14.07.2026 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 Unidelta 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 Unidelta 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/11834138/67234505_large.webp