# Giacomini R157AY053 3-Way Thermostatic Mixing Valve, 25 mm, 60°C, Kvs 3.2

**URL:** https://aio.lv/en/product--giacomini-r157ay053--4619819
**Data updated:** 2026-06-10 09:24 (EEST)
**Category:** Kitchen & Bathroom Faucets
**Manufacturer:** GIACOMINI
**Manufacturer code:** R157AY053
**EAN:** 8009902291082
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 77.99 €
**Prices and availability valid until:** 2026-08-05 23:59
**Price without VAT (21%):** 64.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--giacomini-r157ay053--4619819

## Delivery options

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

## Summary description

The Giacomini R157AY053 is a high-quality 3-way thermostatic mixing valve designed for precise temperature control in heating and plumbing systems. Featuring a 25 mm connection, a fixed temperature setting of 60°C, and a Kvs value of 3.2, this valve ensures efficient flow regulation. It is rated for a maximum operating pressure of 10 bar, providing reliable performance and durability for professional installation requirements.

## Long description

The Giacomini R157AY053 is a high-performance 3-way thermostatic mixing valve engineered for precise temperature regulation in heating and plumbing systems. Specifically designed as an anti-condensation valve for solid fuel boilers, this unit maintains optimal operating temperatures to ensure system efficiency and longevity. With a robust construction and a fixed temperature setting of 60°C, it provides consistent performance under demanding conditions.
Advantages
This thermostatic mixing valve offers exceptional reliability by preventing cold return water from entering the boiler, which effectively mitigates the risk of condensation and corrosion. Its high-quality design ensures stable flow regulation with a Kvs value of 3.2, contributing to the overall energy efficiency of the heating circuit. The durable brass construction and 10 bar pressure rating make it a dependable choice for professional heating installations requiring long-term operational stability.
Suitable for
Solid fuel boiler heating systems
Anti-condensation protection for boilers
Domestic and commercial heating circuits
Temperature control in hydronic systems
This valve may not be suitable for systems requiring adjustable temperature settings, as it is factory-set to a fixed 60°C. It is also not intended for use in high-flow industrial applications that exceed the specified Kvs 3.2 capacity or for systems requiring pipe connections other than the 25 mm (1 inch) standard.
Key specifications
Type: 3-way thermostatic mixing valve
Connection size: 25 mm (1 inch)
Fixed temperature setting: 60°C
Flow coefficient: Kvs 3.2
Maximum operating pressure: 10 bar
Operating temperature range: 5°C to 100°C
How to use
The valve should be installed by a qualified professional in accordance with the heating system's hydraulic schematic. It is typically positioned on the return line to the boiler to facilitate the mixing of hot supply water with cooler return water. Ensure that the flow direction matches the markings on the valve body to guarantee correct thermostatic operation. Once installed, the system should be bled of air to ensure the internal thermal element functions accurately.
What to consider before purchase
Verify that the 60°C fixed temperature setting aligns with your boiler manufacturer's requirements.
Ensure the 25 mm (1 inch) connection size is compatible with your existing piping.
Confirm that the Kvs 3.2 flow capacity is sufficient for your system's hydraulic load.
Check that the maximum operating pressure of 10 bar is within the limits of your installation.
Usage recommendations: Regularly inspect the valve during routine maintenance to ensure it remains free of debris or scale buildup, which could affect the sensitivity of the internal thermostatic element.

## Specifications

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |
| Maximum pressure | 10 bar |
| Assembly required | No |

## FAQ

### How much does the Giacomini R157AY053 3-Way Thermostatic Mixing Valve cost, and is it available for purchase?

The price is 77.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 Friday 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 Giacomini R157AY053 3-Way Thermostatic Mixing Valve 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 GIACOMINI 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 GIACOMINI 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/4619819/59048405_large.webp