The McAlpine DC1BL-OS is a drain connector designed to connect 4"/110mm pipes to BS 4514. It features a 14mm offset, which allows for a more flexible and adjustable installation. The drain connector also includes an 'O' seal socket, which helps to ensure a secure and leak-proof connection. The offset design of the connector allows for some flexibility in the angle of the pipe, which can be useful in certain installation scenarios. Overall, the McAlpine DC1BL-OS is a high-quality and reliable drain connector that can help to ensure a secure and leak-free connection between 4"/110mm pipes and BS 4514 standard drainage systems. Available in Black and Grey. 14mm Offset. Finned seal spigot for internal connection to 4"/110mm cast iron, plastic or clay. Ideal for low level connections. O' seal socket fits 4"/110mm pipe to BS 4514.