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. To use the McAlpine DC1BL-OS, first ensure that the 4"/110mm pipe you are connecting to is to BS 4514 standards. Then, insert the pipe into the 'O' seal socket on the drain connector, making sure that it is securely seated. 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