They are about 4" / 102mm and fit standard 4" clay / plastic exterior waste pipes. I don't know if they do different sizes as this was all I was looking for. A word of warning: if you are buying this product as pictured for a concrete pipe it is the wrong model. This style is designed for plastic pipes only as it fits exactly using O rings. The other model has a rubber seal - take another look and you'll see the difference. By the way, it is an excellent product if a little expensive in my opinion.

Does this Item come in two parts? There is normally an extension piece

Mine came in one part. V snug fit! stopped our problem. Cant recommend enough!! I do check it roughly every two weeks to ensure its working correctly and check for nibbles.. Nothing so far!!!

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Watertight Rat Barrier - Drain Non Return Valve

Watertight Rat Barrier - Drain Non Return Valve

Product ID: 65232955

🐀Rodent Blocker

🔧Easy Installation

🚫Flood Prevention

Description

🛡️ Secure Your Space, Defend Against the Unwanted!

FLOOD DEFENSE - Protects your property from sewer backflow and flooding.
DURABLE DESIGN - Built to withstand harsh conditions and provide long-lasting protection.
RODENT REPELLENT - Keeps pesky rats and rodents at bay, ensuring a clean space.
HASSLE FREE SETUP - No batteries required, making installation a breeze.
COMPACT EFFICIENT - Sleek design fits seamlessly into your drainage system.

The Watertight Rat Barrier - Drain Non Return Valve is a robust solution designed to prevent flooding from sewers and drains while effectively blocking rodents from entering your property. With no batteries required and easy installation, it’s the perfect addition to safeguard your home.

Specifications

Manufacturer	Watertight
Part Number	PL100110
Manufacturer reference	PL100110
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No

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