Comes with a 16 inch flexible brush, you can push a brush into the easily for cleaning The clear PVC U shaped pipe and openable blue caps makes you easily inspect sediment builds to block the and easily opens it for cleaning Make of PVC, which is enduring; Besides, it is very and can work well on your 3 / 4inch PVC drain line for your central air conditioning, furnaces condensate, and HVAC systems The standard condensate adopts a gradient design to effectively drains condensate in a variety of HVAC systems The U shape pipe filled with water is enough to stop the suction from pulling water back into the air conditioners, stopping the backflow of condensed water, so that the water can be drained smoothly, Manufacturer: Kaeltsyn