Kair Equal T-Piece Adaptor 110mm x 54mm for Rectangular Plastic Ducting Rectangular ducting equal T junction with female sockets for use with Kair System 100 Rectangular Ducting. This item can be used to duct in to different areas and join different duct runs together. We recommend using with Kair 110mm x 54mm pipe to ensure optimal fit - Part: DUCVKC249. Made in the UK using Polystyrene/Polypropylene. Max / Min Temperature: +60c / -15c. Compact dimensions. Perfect for flush fitting against ceilings and walls. Suitable to use in compliance with Part F Building Regulations Easy to install, just push-fit together & seal if required using a method of your choice (Popular options include silicone sealant, solvent cement, or tape). Kair System 100 (SYS-100) Rectangular Ducting is designed for short duct runs and it can be easily concealed due to its low profile. It is perfect for installations requiring low extraction rates such as bathrooms, toilets, and utility rooms. It can be flush fitted against ceilings and walls and can be concealed above wall units or inside ceiling voids. Compatible with the extensive Kair rectangular range of fittings, outlets, and grilles.