---
product_id: 64335025
title: "McAlpine CONVALVE in-Line Vertical Non-Return Valve - White"
brand: "mcalpine"
price: "201.79 DT"
currency: TND
in_stock: true
reviews_count: 7
category: "Mcalpine"
url: https://www.desertcart.tn/products/64335025-mcalpine-convalve-in-line-vertical-non-return-valve-white
store_origin: TN
region: Tunisia
---

# BS 6798:2009 & Building Regs compliant Prevents wastewater backflow 19/23mm inlet/outlet precision fit McAlpine CONVALVE in-Line Vertical Non-Return Valve - White

**Brand:** mcalpine
**Price:** 201.79 DT
**Availability:** ✅ In Stock

## Summary

> 🚿 Keep your boiler safe and your home worry-free with McAlpine CONVALVE!

## Quick Answers

- **What is this?** McAlpine CONVALVE in-Line Vertical Non-Return Valve - White by mcalpine
- **How much does it cost?** 201.79 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/64335025-mcalpine-convalve-in-line-vertical-non-return-valve-white)

## Best For

- mcalpine enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Only 60g and 12x5x15 cm—easy to handle and install without bulk
- • **Precision Engineering:** 19/23mm inlet and outlet ensure a snug, leak-proof connection every time
- • **Ultimate Backflow Barrier:** Stops wastewater from contaminating your condensing boiler—protect your investment
- • **Regulation-Ready Reliability:** Built to meet BS 6798:2009 and Approved Document H standards—no compromises
- • **Seamless Vertical Integration:** Fits perfectly in vertical pipe sections for hassle-free installation

## Overview

The McAlpine CONVALVE is a compact, vertical non-return valve designed to prevent wastewater backflow into condensing boilers. Featuring 19/23mm inlet and outlet fittings, it ensures a secure, leak-proof installation. Compliant with BS 6798:2009 and Building Regulations Approved Document H, this lightweight valve safeguards your heating system with easy vertical pipe integration.

## Description

Shop McAlpine CONVALVE in-Line Vertical Non-Return Valve - White. Free delivery on eligible orders of £20 or more.

Review: Perfect - My boiler had broken down and the issue was the condensate being attached to the soil stack and we had a blockage which then climbed up through the condensate pipe and into the boiler, this little device has stopped this every happening again, easy to install just cut out small bit of pipe and fit it on just like you would with any compression waste fitting ( has to be fitted in a vertical piece of pipe ) easy fix
Review: Check pipe size - Easy fit, simple design, nice unit

## Features

- Vertical Non-Return valve
- 19/23mm Inlet and Outlet
- Prevents waste water from sanitary pipework entering a condensing boiler
- Receives the discharge from a condensing boiler
- Conforms to BS 6798:2009 and Building Regulations Approved Document H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005CTSE48 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 390,212 in DIY & Tools ( See Top 100 in DIY & Tools ) 3,382 in Central Heating System Accessories 15,868 in Pumps & Plumbing Equipment |
| Colour | White |
| Customer Reviews | 4.3 4.3 out of 5 stars (47) |
| Date First Available | 2 May 2013 |
| Included Components | trap; fittings; |
| Item Package Quantity | 1 |
| Item Weight | 60 g |
| Item model number | CONVALVE |
| Manufacturer | McAlpine |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part Number | CONVALVE |
| Product Dimensions | 12 x 5 x 15 cm; 60 g |

## Images

![McAlpine CONVALVE in-Line Vertical Non-Return Valve - White - Image 1](https://m.media-amazon.com/images/I/51nrV9nkqiL.jpg)
![McAlpine CONVALVE in-Line Vertical Non-Return Valve - White - Image 2](https://m.media-amazon.com/images/I/61k2Oq2NwyL.jpg)

## Questions & Answers

**Q: When should I use an anti-syphon or resealing trap?**
A: Generally, the waste pipe or discharge pipe from an appliance is beyond the limitations of an unvented waste pipe. Usually more critical on the basin and bidet Wastes.

**Q: What is the difference between an anti-syphon trap and a re-sealing trap?**
A: A re-sealing is designed to allow air to pass through the water seal under negative pressure but will retain sufficient water. An anti siphon trap has a small mechanical valve which opens under negative pressure.

**Q: Why does water not run away in my shower?**
A: If it is not due to the obvious reason of a blockage caused by a buildup of debris, the problem could be due to back pressure within the discharge pipe.

**Q: What is the maximum thickness of bath that your bath fillers can be installed on?**
A: The maximum thickness of the bath is 20mm and unfortunately, we do not make an extension ferrule to extend that length.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by M***Y on 15 October 2022*

My boiler had broken down and the issue was the condensate being attached to the soil stack and we had a blockage which then climbed up through the condensate pipe and into the boiler, this little device has stopped this every happening again, easy to install just cut out small bit of pipe and fit it on just like you would with any compression waste fitting ( has to be fitted in a vertical piece of pipe ) easy fix

### ⭐⭐⭐⭐⭐ Check pipe size
*by D***S on 11 July 2023*

Easy fit, simple design, nice unit

### ⭐⭐⭐⭐⭐ Effectively stops water backflow.
*by M***M on 26 October 2020*

I use this with a cellar pump to stop backflow into a cellar water sump. It works perfectly.

## Frequently Bought Together

- McAlpine CONVALVE in-Line Vertical Non-Return Valve
- Monument 15mm Olive Cutter
- McAlpine TUN5-CL Tunvalve Straight Through (Clear)

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**Shop now:** [https://www.desertcart.tn/products/64335025-mcalpine-convalve-in-line-vertical-non-return-valve-white](https://www.desertcart.tn/products/64335025-mcalpine-convalve-in-line-vertical-non-return-valve-white)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-04*