---
product_id: 54101670
title: "Caleffi 525040 1/2\" Mechanical Shock Arrestor Prevents Plumbing Water Hammer"
brand: "caleffi"
price: "72368CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Caleffi"
url: https://www.desertcart.sn/products/54101670-caleffi-525040-1-2-mechanical-shock-arrestor-prevents-plumbing-water
store_origin: SN
region: Senegal
---

# Max operating pressure 10 bar Durable PTFE sealing thread 1/2 inch chrome-plated brass case Caleffi 525040 1/2" Mechanical Shock Arrestor Prevents Plumbing Water Hammer

**Brand:** caleffi
**Price:** 72368CFA
**Availability:** ✅ In Stock

## Summary

> 🔇 Stop the Knock, Start the Calm

## Quick Answers

- **What is this?** Caleffi 525040 1/2" Mechanical Shock Arrestor Prevents Plumbing Water Hammer by caleffi
- **How much does it cost?** 72368CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/54101670-caleffi-525040-1-2-mechanical-shock-arrestor-prevents-plumbing-water)

## 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

- • **Precision PTFE Sealing:** Advanced PTFE thread sealing guarantees leak-free installation and maintenance ease
- • **Pressure-Ready Performance:** Handles up to 10 bar operating pressure, perfect for modern plumbing systems
- • **Built to Last with Premium Brass:** Robust 1/2 inch chrome-plated brass casing ensures long-term durability and corrosion resistance
- • **Silence Your Pipes, Elevate Your Space:** Eliminates disruptive water hammer noise for a peaceful home environment
- • **Effortless Installation, Instant Results:** Fits seamlessly into existing plumbing setups, delivering quiet pipes in under 30 minutes

## Overview

The Caleffi 525040 Mechanical Shock Arrestor is a high-quality 1/2 inch chrome-plated brass device designed to prevent plumbing water hammer noise. Rated for a maximum operating pressure of 10 bar and featuring PTFE sealing threads, it ensures a durable, leak-free installation. Ideal for professionals and DIY enthusiasts alike, it delivers quiet, knock-free pipes quickly and reliably.

## Description

Shop Caleffi 525040 1/2" Mechanical Shock Arrestor Prevents Plumbing Water Hammer. Free delivery on eligible orders of £20 or more.

Review: Excellent product - Excellent product does what it states on the box
Review: Very Happy. - Took approx 30 mins to fit, and now we are free of the pipe knock. The Caleffi Anti Shock device is well made, has a bit weight to it, and feels solid. I was concerned about the weight causing problems with the pipework, but when all was tightened up it was OK. Our pipe knock started after we had a new toilet fitted by a professional plumber (wish I did it myself and saved some money as he obviously did not take precautions of fastening the pipework down correctly before they were buried beneath dry-board). Now all is silent as it was before. I could not fit it directly to the toilet supply line due to space restrictions, so I fitted it below the sink which is approx 3 to 4 feet away, on the far side of the supply pipe from the toilet. It has just been fitted and like I have said is working great, but if in the future it starts to knock again I will update.

## Features

- Water shock musher
- 1/2 inch chrome-plated br case
- Max. Operating pressure: 10 bar
- PTFE sealing thread

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C9WB9J8 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 227,774 in DIY & Tools ( See Top 100 in DIY & Tools ) 690 in Bathroom Sink Taps |
| Customer Reviews | 4.2 4.2 out of 5 stars (44) |
| Date First Available | 9 April 2013 |
| Finish | Polished |
| Item Package Quantity | 1 |
| Item Weight | 490 g |
| Item model number | K11489 |
| Manufacturer | CALEFFI |
| Material | Messing |
| Number of handles | 1 |
| Part Number | 525040 |

## Product Details

- **Brand:** Caleffi
- **Finish type:** Polished
- **Manufacturer:** CALEFFI
- **Material:** Messing
- **Thread size:** 1/2"

## Images

![Caleffi 525040 1/2" Mechanical Shock Arrestor Prevents Plumbing Water Hammer - Image 1](https://m.media-amazon.com/images/I/61NOvHOsR9L.jpg)

## Questions & Answers

**Q: I've had one of these for 2-3 years for hammering from my washing machine. The hammering has started again. Can these start to fail after a while?**
A: Larger types have balloons inside which expand this relieves the back pressure(water hammer), this type is different it could have a spring and valve arrangement because of its small size, but does the same job. Its possible the internals blocked/broken.

**Q: can this be fitted to a water tank fitted with a ball valve**
A: Sorry no idea we have its fitted to the house stop tap and still had to turn the waters pressure down . Its has helped it  . We had water hammer really bad.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent product
*by C***S on 17 November 2024*

Excellent product does what it states on the box

### ⭐⭐⭐⭐⭐ Very Happy.
*by G***N on 24 December 2019*

Took approx 30 mins to fit, and now we are free of the pipe knock. The Caleffi Anti Shock device is well made, has a bit weight to it, and feels solid. I was concerned about the weight causing problems with the pipework, but when all was tightened up it was OK. Our pipe knock started after we had a new toilet fitted by a professional plumber (wish I did it myself and saved some money as he obviously did not take precautions of fastening the pipework down correctly before they were buried beneath dry-board). Now all is silent as it was before. I could not fit it directly to the toilet supply line due to space restrictions, so I fitted it below the sink which is approx 3 to 4 feet away, on the far side of the supply pipe from the toilet. It has just been fitted and like I have said is working great, but if in the future it starts to knock again I will update.

### ⭐⭐⭐⭐ Maintenance free and still working well after more than a year.
*by T***E on 18 August 2015*

We had serious hammer in the pipe to our header tank even though we have a 4 bar pressure limiting valve. On bad days it could last for several minutes before ending, unless a tap was opened. I fitted a suppressor next to the tank in the shape of a dome which could be pressurised with a bicycle pump. It killed the hammer completely while filled with air, but the air tended to be absorbed after a month or two, so it needed regular re-pressurising. This device instead uses a sprung piston to dampen the hammer. The result is that it does not kill it instantly, but often there is a "groan" which lasts about 10 seconds as the spring does its work. But it needs no maintenance and after more than a year is still working effectively.

## Frequently Bought Together

- Caleffi 525040 1/2" Mechanical Shock Arrestor Prevents Plumbing Water Hammer
- Shelly H&T Temperature and Humidity Status, Configuration with App Shelly, White

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sn/products/54101670-caleffi-525040-1-2-mechanical-shock-arrestor-prevents-plumbing-water](https://www.desertcart.sn/products/54101670-caleffi-525040-1-2-mechanical-shock-arrestor-prevents-plumbing-water)

---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-13*