# Straight union with half-nut Herz P701641 16x2 G 3/4 flat sealing

**URL:** https://aio.lv/en/product--herz-p701641--11825525
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Herz
**Manufacturer code:** P701641
**EAN:** 9004174139802
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 6.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--herz-p701641--11825525

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Straight union (union coupling) Herz model P701641 for piping systems, with half-nut design. Connection size 16x2 mm and external thread G 3/4, using a flat sealing surface. Intended for joining copper or plastic pipes in heating and plumbing installations where a sealed threaded connection is required.

## Long description

Straight union with half-nut Herz P701641 16x2 G 3/4 flat sealing is a mechanical coupling designed for creating sealed threaded connections between a 16x2 mm pipe and components with a G 3/4 external thread. Manufactured by Herz for heating and plumbing installations, this union features a half-nut body and a flat sealing surface to ensure a reliable seal when joining copper or compatible plastic pipes to fittings, valves or appliances that accept a G 3/4 thread.
Advantages
The half-nut design allows for secure and compact assembly without requiring rotation of the attached fitting, simplifying installation in confined spaces. The flat sealing surface provides consistent contact pressure for leak-resistant joints when properly installed with the correct gasket or sealing material. Constructed to industry plumbing standards, the union offers dimensional compatibility with 16x2 piping and common G 3/4 threaded connections, aiding straightforward integration into existing heating and plumbing systems.
Suitable for
Joining 16x2 mm copper pipes to fittings or valves with G 3/4 external threads
Connecting plastic pipes (where compatible) to threaded heating system components
Retrofit and repair work in heating and plumbing installations where a flat-sealed union is required
Key specifications
Pipe connection size: 16x2 mm
Threaded end: external G 3/4
Seal type: flat sealing surface (requires appropriate gasket/seal)
Design: straight union with half-nut
Application: heating and plumbing pipe connections
How to use
Prepare the 16x2 mm pipe by cutting squarely and deburring the end to ensure full contact with the union seating. Fit the appropriate gasket or sealing element onto the flat sealing surface according to manufacturer guidance. Slide the union body and half-nut into place, engage the G 3/4 external thread by hand to avoid cross-threading, then tighten to the specified torque or until a firm, leak-free fit is achieved. After assembly, pressure-test the connection following local installation standards and correct any leaks by re-seating or replacing the sealing gasket if necessary.
Usage recommendations
Use a gasket or flat sealing washer compatible with the fluids and temperatures in your system. Avoid over-tightening the union; follow torque recommendations from Herz or general plumbing practice. For plastic pipe installations, verify material compatibility and use proper pipe insert or reinforcement if recommended to maintain a secure mechanical connection.

## FAQ

### How much does the Herz straight union P701641 16x2 G 3/4 cost, and is it available for purchase?

The price is 7.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 13 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 15.07.2026 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 Herz 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 Herz 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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