# Herz bypass body for two-pipe heating system model 1718914

**URL:** https://aio.lv/en/product--herz-1718914--11700130
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Heating Radiators
**Manufacturer:** Herz
**Manufacturer code:** 1718914
**EAN:** 9004174743108
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 15.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--herz-1718914--11700130

## 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 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Bypass body for a two-pipe (two-pipe) heating system from Herz, model 1718914. Designed to be installed in hydronic heating circuits to provide controlled bypass flow between supply and return lines. Used to stabilize differential pressure, protect valves and balance system hydraulics in radiators, manifolds and boiler connections. Suitable for professional HVAC installations and repairs.

## Long description

Herz bypass body for two-pipe heating system model 1718914 is a purpose-built hydraulic component intended for hydronic heating circuits. It provides a controlled bypass flow between supply and return lines to stabilise differential pressure and maintain proper circulation. The unit is suitable for installation in radiator branches, manifold assemblies and boiler connections where protection of control valves and balanced system hydraulics are required.
Advantages
The bypass body ensures stable system pressure by allowing excess flow to return to the circuit, reducing the risk of valve chatter and premature wear in thermostatic and motorised valves. Its compact design simplifies integration into existing two-pipe layouts and supports reliable hydraulic balance without complex adjustments. Constructed for professional HVAC use, the component contributes to efficient heat distribution and reduces strain on the circulation pump under varying load conditions.
Suitable for
Two-pipe hydronic heating systems in residential and commercial buildings
Protection and stabilisation of thermostatic and motorised radiator valves
Hydraulic balancing of manifolds and multi-branch radiator circuits
Boiler return line bypass to prevent excessive differential pressure
Key specifications
Type: bypass body for two-pipe heating systems
Function: controlled bypass flow between supply and return
Application: radiator circuits, manifolds, boiler connections
Compatibility: designed for use in closed hydronic heating loops
Installation: inline connection between supply and return lines
How to use
Install the bypass body inline between the supply and return pipes at a location recommended by the system designer or installer, typically near manifolds or the boiler return. Ensure pipework is depressurised and drained before fitting. Secure connections with appropriate fittings and check for correct orientation according to flow direction. After installation, refill and vent the system, then verify that differential pressure and valve operation are within expected ranges. Commission the circuit by observing flow conditions across different load scenarios and adjust associated balancing valves if present.
Usage recommendations
Integrate the bypass body during initial installation or retrofit as part of a professional hydraulic balancing procedure. Use alongside correctly sized control valves and follow local codes for pressure and temperature limits. Periodic inspection during routine system maintenance is advised to confirm leak-free connections and proper operation.

## FAQ

### How much does the Herz bypass body 1718914 for two-pipe heating cost, and is it available for purchase?

The price is 18.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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 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

https://aio.lv/img/cache/product/11700130/67083259_large.webp