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🚫🐀 Keep your pipes clean and pest-free with McAlpine’s ultimate barrier valve!
The McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve is a durable, black rubber valve designed to prevent cross-flow in back-to-back WC pans 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. Certified to BS EN 12056-2:2000, CE, and RoHS standards, it offers reliable, professional-grade protection for your plumbing system.










| ASIN | B009NEBTHW |
| Best Sellers Rank | 235,438 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,234 in Rodent Control 72,708 in Hardware |
| Brand | Mcalpine |
| Customer Reviews | 4.4 out of 5 stars 448 Reviews |
| Exterior Finish | Black |
| Exterior finish | Black |
| Global Trade Identification Number | 05036484014955 |
| Included Components | 1 x valve |
| Inlet Connection Size | 110 Millimeters |
| Inlet Connection Type | Compression |
| Inlet connection size | 110 Millimeters |
| Inlet connection type | Compression |
| Item Dimensions | 6.4 x 11.3 x 11.3 centimetres |
| Item Type Name | McAlpine ARB-1 Anti Cross-Flow and Rodent Barrier Valve |
| Item dimensions L x W x H | 6.4 x 11.3 x 11.3 centimetres |
| Manufacturer | McAlpine |
| Manufacturer Warranty Description | 1. |
| Material | Rubber |
| Model Number | ARB-1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 110 Millimeters |
| Outlet Connection Type | Push-fit or Compression |
| Part Number | ARB-1 |
| Specification Met | BS EN 12056-2:2000, CE, RoHS |
| Unit Count | 1.0 count |
| Valve Type | Barrier Valve |
K**N
do great job
advised by pest man to buy these and they are great
S**2
Did the job perfectly
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.
D**W
Good quality item that does the job
Simple and easy to fit in the soil pipe just by replacing the existing rubber seal with this item. Can be used vertically or horizontally, no tools needed.
E**R
Easy too fit works
Easy instal and it works . Hopefully no sewer rats anymore.
N**B
Stop the smell from drain gully
Placed this inside the 4" wasted gully pipe which took the waste water from the kitchen sink, washing machine,& dishwasher. it put a stop to the smells that kept coming out of that drain! Was easy to fit & a lot cheaper than digging up the drive to replace the gully. Use silcone grease inserting valve easier, i also smeared silicone grease around the metal string & hinge to keep it operating smoothly.
A**K
watch the size
seemed to fit ok but then we discovered that it either sticks shut or sticks open because the hinge moulding is slightly proud of a 110mm pipe fitting. Had to grind the edges from the moulding to make it fit
S**.
Excellent
Excellent
M**N
Good
Done the job & easy to install
P**O
Al momento sembra troppo bello per essere vero.
Preso per disperazione causa continui riflussi di acque nere. Installato dal pozzetto d'ispezione. Facilissimo da inserire (e questo mi ha stupito) per misure standard. Per sicurezza ho siliconato tutto attorno ma sembrava stabile anche senza. Posizionato in orizzontale, funziona perfettamente. Monitorerò comunque nelle prossime settimane.
S**N
Nützlicher Artikel
Guter Artikel ! Ich habe ihn schon zwei mal gekauft !
C**N
Buen producto
Fácil de instalar
G**R
Avis sur le produit
J’ai utilisé ce clapet pour éviter des mauvaises odeurs dans la douche. Résultat concluant. Seul bémol, les dimensions du clapet ne correspondent pas aux dimensions sur le site. 110 mm au lieu de 120 mm. Donc il a fallu que je bricole une bague.
J**E
Bueno
Bueno
Trustpilot
1 week ago
5 days ago