---
product_id: 48193556
title: "– McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve, Black"
brand: "mcalpine"
price: "₨1230"
currency: SCR
in_stock: true
reviews_count: 13
url: https://www.desertcart.sc/products/48193556-mcalpine-arb-1-anti-cross-flow-and-rodent-barrier-valve
store_origin: SC
region: Seychelles
---

# Rodent-proof barrier Fits horizontal & vertical Stops cross-flow instantly – McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve, Black

**Brand:** mcalpine
**Price:** ₨1230
**Availability:** ✅ In Stock

## Summary

> 🚫🐀 Keep your pipes clean and critters out—install the McAlpine ARB-1 today!

## Quick Answers

- **What is this?** – McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve, Black by mcalpine
- **How much does it cost?** ₨1230 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/48193556-mcalpine-arb-1-anti-cross-flow-and-rodent-barrier-valve)

## 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

- • **Rodent Defense Mode:** Built-in barrier to keep sewer rats and pests out of your space
- • **Certified Reliability:** BS EN 12056-2:2000, CE, and RoHS certified for trusted quality and safety
- • **Flexible Installation:** Versatile design fits both horizontal and vertical pipe setups effortlessly
- • **No More Backflow Blues:** Prevents cross-flow in back-to-back WC pans for hygienic peace of mind
- • **Universal Compatibility:** Works seamlessly with any McAlpine 4"/110mm WC connector with rubber seal

## Overview

The McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve is a durable rubber valve designed to prevent back-to-back WC pan cross-flow and block rodents from entering through WC pipes. It installs easily in both horizontal and vertical orientations and fits any McAlpine 4"/110mm WC connector with a rubber outlet seal. Certified to BS EN 12056-2:2000, CE, and RoHS standards, it offers a reliable, hygienic solution for rodent control and plumbing integrity.

## Description

Prevent cross-flow and deter rodents from entering through WC pipes with this durable, versatile valve. Can be installed horizontally or vertically for effective control.

Review: Easy too fit works - Easy instal and it works . Hopefully no sewer rats anymore.
Review: Good - Done the job & easy to install

## Features

- Prevents cross flow if fitted to back to back WC pans
- Deters rodents from entering the building through WC
- Can be installed horizontally or vertically
- For use where special measures are necessary for control of rodents
- For use with any McAlpine rigid or flexible WC connector with 4"/110mm rubber outlet seal

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009NEBTHW |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 172,807 in DIY & Tools ( See Top 100 in DIY & Tools ) 986 in Rodent Control 53,215 in Hardware |
| Certification | BS EN 12056-2:2000, CE, RoHS |
| Colour | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (439) |
| Date First Available | 8 Oct. 2012 |
| Included Components | 1 x valve |
| Item Package Quantity | 1 |
| Item Weight | 80 g |
| Item model number | ARB-1 |
| Manufacturer | McAlpine |
| Material | Rubber |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part Number | ARB-1 |
| Product Dimensions | 6.4 x 11.3 x 11.3 cm; 80 g |

## Product Details

- **Brand:** Mcalpine
- **Exterior finish:** Black
- **Inlet connection size:** 110 Millimeters
- **Inlet connection type:** Compression
- **Item dimensions L x W x H:** 6.4 x 11.3 x 11.3 centimetres
- **Material:** Rubber
- **Number of ports:** 2
- **Outlet connection size:** 110 Millimeters
- **Outlet connection type:** Push-fit or Compression
- **Specification met:** BS EN 12056-2:2000, CE, RoHS

## Images

![– McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve, Black - Image 1](https://m.media-amazon.com/images/I/51J6ODI3J8L.jpg)

## Questions & Answers

**Q: Would this work with very low water pressure**
A: This device fits in the waste pipe after the toilet pan and is only reliant on the water flushing from the pan to open then the spring hinge closes it. As the water is gravity fed from the pan it makes no difference whether you have low or high water pressure. The only factor is whether your cistern delivers a 7 or 10 litre flush and the amount of waste being flushed. A consideration in fitting the device is that if the drain backs up with effluent then the device is forced closed and the toilet pan will not empty when flushed but this would happen anyway but the device can stop overflow effluent from coming into your pan from elsewhere if your toilet is at low level compared to others on the same drains

**Q: Need one of these for 3" down pipes... Will this fit?**
A: It's for a 4" waste pipe. Replaces the seal on a toilet pan connector.

**Q: Is this product only compatible with mcalpine wc pan connectors?**
A: Nope, for any toilet.

**Q: Does this trap fit externally or internally to the existing outlet? My outlet is flush to the wall of access pit so would need to be an internal fit,**
A: Hi there, this is designed to fit in place of the existing rubber fin seal on the end of many WC pan connectors, It can however fit inside a 110mm pushfit or solvent pipe or fitting wit a decent seal, although please check regs and practicality of your installation, Regards esda-supplies

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy too fit works
*by E***R on 8 May 2025*

Easy instal and it works . Hopefully no sewer rats anymore.

### ⭐⭐⭐⭐⭐ Good
*by M***N on 13 May 2025*

Done the job & easy to install

### ⭐⭐⭐⭐⭐ Did the job perfectly
*by S***2 on 26 May 2023*

Bought two of these in an attempt to stop the smell from the main sewer wafting through the house from time to time from the kitchen and downstairs bathroom outlets. They were easy to fit and I checked the water was flowing before refitting the drain cover. The doors automatically open when the water pressure builds up behind them. It’s been a few days now and I can honestly say there have been no odours whatsoever. Wish I’d bought some of these ages ago.

## Frequently Bought Together

- Mcalpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve, Black
- Anti-Rat Rodent Barrier 110mm Toilet Outlet Drain Waste Soil Sewer Valve
- Flexible Toilet Pan Connector Universal WC Flexi Slinky Waste Soil Pipe 260mm-500mm

---

## 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.sc/products/48193556-mcalpine-arb-1-anti-cross-flow-and-rodent-barrier-valve](https://www.desertcart.sc/products/48193556-mcalpine-arb-1-anti-cross-flow-and-rodent-barrier-valve)

---

*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-16*