# Water pump WILO Star-Z 20/4-3 for domestic hot water circulation, model 4081193

**URL:** https://aio.lv/en/product--wilo-4081193--5114477
**Data updated:** 2026-03-07 15:14 (EET)
**Category:** Water Pumps
**Manufacturer:** WILO
**Manufacturer code:** 4081193
**EAN:** 4016322698043
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 393.49 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 325.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wilo-4081193--5114477

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Circulation pump WILO Star-Z 20/4-3 (MPN 4081193) designed for domestic hot water (DHW/CWU) systems. Intended for continuous circulation of hot water to reduce wait time at taps and maintain temperature stability. Key identifiers include model designation 20/4-3 and manufacturer WILO. Suitable for residential and light commercial DHW circulation loops.

## Long description

WILO Star-Z 20/4-3 is a circulation pump designed for domestic hot water (DHW) systems to maintain stable temperature and reduce waiting time at taps. The pump is intended for continuous operation in residential and light-commercial hot water recirculation loops, providing reliable transport of heated water through piping networks to ensure quicker access to hot water and lower water waste.
Advantages
The WILO Star-Z 20/4-3 offers compact dimensions and a robust construction suitable for prolonged operation in hot water circulation systems. It delivers consistent flow rates and pressure heads appropriate for short to medium-length recirculation circuits while minimizing noise and energy consumption under typical domestic loads. The pump design supports straightforward integration into existing DHW loops and enables steady maintenance of set temperatures.
Suitable for
 Domestic hot water recirculation loops in single-family homes
 Small multi-family residential buildings
 Light commercial facilities requiring continuous hot water supply
 Retrofit installations to reduce cold-water waiting times at taps
Key specifications
 Application: Continuous circulation of domestic hot water
 Fluid handled: Hot water for sanitary use
 Nominal diameter and connection compatibility suitable for standard domestic piping
 Designed for continuous operation and regular thermal loads of DHW systems
 Compact footprint for easy installation in tight plant rooms or under sinks
 Low-noise operation appropriate for residential environments
How to use
Install the pump in the recirculation line following local plumbing codes and manufacturer mounting orientation. Ensure correct hydraulic connection with isolation valves and, where required, a check valve to prevent backflow. Provide electrical connection by a qualified electrician in accordance with local regulations and ensure proper earthing. Commission the pump by flushing the system, venting air, and verifying continuous circulation and temperature stability. Regularly inspect seals and connections and test operation after any maintenance or system changes.
Usage recommendations
Use the WILO Star-Z 20/4-3 in systems with appropriate water quality for potable hot water; avoid aggressive fluids or concentrations that may harm internal components. Schedule periodic inspections to check for leaks, noise changes or reduced flow, and follow local guidelines for electrical safety and plumbing practice during installation and servicing.

## FAQ

### How much does the WILO Star-Z 20/4-3 circulation pump cost, and is it available for purchase?

The price is 393.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 01.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can WILO Star-Z 20/4-3 circulation pump be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 WILO 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 WILO 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/5114477/51390323_large.webp