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Underground Square Bottle Gully Adaptors are 110mm in size. They fit standard underground drainage systems. If you’re installing underground drainage, it’s important to make sure you have the correct underground drainpipes and drainage pipe fittings for your project. Designed for durability, they offer a secure connection. Easy to install, they ensure efficient water flow. Made from robust materials, they resist damage. Ideal for various plumbing projects. Suitable for residential or commercial use. Ensure a reliable connection with these adaptors.. Underground Square Bottle Gully Adaptors - 110mm JTM UGS019