---
product_id: 98245695
title: "Caleffi 521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor"
brand: "caleffi"
price: "61216 som"
currency: KGS
in_stock: true
reviews_count: 5
url: https://www.desertcart.kg/products/98245695-caleffi-521519ac-mixing-cal-3-way-thermo-mixing-valve-checks
store_origin: KG
region: Kyrgyzstan
---

# temperature & pressure stability 0.75-inch sweat inlet/outlet 3-way thermo mixing precision Caleffi 521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor

**Brand:** caleffi
**Price:** 61216 som
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay in control with flawless temperature flow!

## Quick Answers

- **What is this?** Caleffi 521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor by caleffi
- **How much does it cost?** 61216 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/98245695-caleffi-521519ac-mixing-cal-3-way-thermo-mixing-valve-checks)

## Best For

- caleffi enthusiasts

## Why This Product

- Trusted caleffi brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Low-Lead Brass:** Premium brass construction ensures long-lasting reliability and corrosion resistance.
- • **Integrated Check Valves:** Prevents backflow, enhancing system safety and efficiency.
- • **Compact Yet Robust Design:** At just over 6 inches, it fits tight spaces without compromising performance.
- • **Precision Thermal Control:** Compensates for temperature and pressure fluctuations to keep your system perfectly balanced.
- • **Universal 0.75-Inch Sweat Connections:** Seamlessly integrates with standard plumbing setups for hassle-free installation.

## Overview

The Caleffi 521519AC is a 3-way thermo mixing valve crafted from low-lead brass, designed to maintain consistent temperature by compensating for pressure and temperature fluctuations. Featuring 0.75-inch sweat inlet and outlet connections with integrated check valves, it offers reliable, compact, and easy-to-install performance for professional plumbing systems.

## Description

Caleffi521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor

## Features

- Maintain Temperature
- Compensates for both temperature and pressure fluctuations
- Connection Type: Sweat inlet check valves
- Connection Size: 0.75-Inch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Brass |
| Brand | Caleffi |
| Item dimensions L x W x H | 6.13 x 1.5 x 7.19 inches |
| Exterior Finish | Brass |
| Inlet Connection Size | 0.75 Inches |
| Inlet Connection Type | Sweat |
| Outlet Connection Type | Sweat |
| Number of Ports | 3 |
| Outlet Connection Size | 0.75 Inches |
| Valve Type | check_valve |
| Global Trade Identification Number | 08016615320800 |
| Manufacturer | Caleffi |
| UPC | 801661532080 |
| Part Number | 521519AC |
| Item Weight | 3 pounds |
| Product Dimensions | 6.13 x 1.5 x 7.19 inches |
| Item model number | 521519AC |
| Item Package Quantity | 1 |
| Measurement System | inch |
| Batteries Required? | No |

## Product Details

- **Material:** Brass
- **Brand:** Caleffi
- **Item dimensions L x W x H:** 6.13 x 1.5 x 7.19 inches
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 0.75 Inches
- **Inlet Connection Type:** Sweat
- **Outlet Connection Type:** Sweat
- **Number of Ports:** 3
- **Outlet Connection Size:** 0.75 Inches
- **Valve Type:** check_valve

## Images

![Caleffi 521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor - Image 1](https://m.media-amazon.com/images/I/51uXYUc0yCL.jpg)

## Questions & Answers

**Q: What is the temperatura range in the dial? Image quality is poor so I can't actually see the numbers...**
A: and Temp Range adjusts from 85˚ - 150˚F

## Customer Reviews

### ⭐⭐⭐⭐⭐ Caleffi Mixing Valve - recommended
*by J***N on November 23, 2014*

I have solar hot water and my water tank temperature varies from 125 to about 170 degrees. I have the valve adjusted to maintain a steady temperature of 125 degrees. I'm not sure of the exact temperature range, but I think this valve ranges from just below 120 degrees to just above 130 degrees. Other valves limit the maximum temperature to somewhere just below 125 degrees, which could be a little unacceptable in some circumstances. You'll want to confirm the operating temperature range if you're still shopping around. The competing valves often run a few degrees below their stated maximum so make sure the valve is advertised to go above your target temperature by a few degrees. By measuring the temperature of this valve I have determined that the output water temperature remains steady although the pressure and tank temperature varies quite a bit. I'm very satisfied with the installation and the temperature consistency. The product quality is high and It comes with check valves plus a temperature guage to help you keep an eye on the output temperature.

### ⭐⭐⭐⭐⭐ hence the initial variation at startup (a couple smaller point of use devices wouldlikely work better for me) - but thats not a
*by A***W on November 23, 2016*

Heavy duty, solid design, very well machined (fit and finish). Controls temperature within 7 deg or so with varying water usage including startup (from zero water draw to demand), within a degree or so with constant water draw. This unit might be a bit oversized for my house, hence the initial variation at startup (a couple smaller point of use devices wouldlikely work better for me) - but thats not a fault with the product. Will buy caleffi ptoducts again.

### ⭐⭐⭐⭐⭐ High quality and very accurate
*by S***. on March 23, 2015*

Installed in a system with a boiler serving both an air handler and indirect hot water tank. In my system, this valve serves two benefits: 1. I can raise the storage temperature high enough to kill legionella bacteria; 2. effectively, it takes much longer to empty the hot water tank--so the boiler does not shift priority from heating the home to heating hot water as often. That's particularly useful on cold winter days.The valve itself is made in Italy and seems to be very accurate and responsive to small changes to the dial. This is a get-what-you-pay-for product. Highly recommended.

## Frequently Bought Together

- Caleffi 521519AC Mixing Cal 3-Way Thermo Mixing Valve with checks, Low-Lead Brass with Adaptor
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- Taco 400-4 1/8-Inch-NPT Float Air Hy-Vent

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-17*