The NTI Boiler 6000085281 Cleaning Gasket is a replacement sealing component designed for compatible TFT VM153 and MID boiler systems. It creates a secure seal between mating surfaces during assembly, helping prevent water or combustion-related leaks and maintain proper equipment operation. This gasket is used during boiler servicing, cleaning, and maintenance to restore sealing integ... https://www.partshnc.com/nti-boiler-6000085281-cleaning-gasket-tft-vm153-mid