Thank you for your question. This video shows how to connect a small grease trap with a capacity of 5 GPM, mainly used in home kitchens. It does not require ventilation. At the same time, in any grease trap, including ours, it is recommended to use biological products for decomposing fat regularly. We recommend using these tablets. www.amazon.com/dp/B076PB2C5J Why tablets? When using liquids and powders, bacteria and enzymes are washed out faster by water flow. Due to their large mass, the tablets remain in place and continue to work for 2 weeks. The tablets have a high concentration. They are made in the USA and consist of bacteria specially selected for more effective decomposition of fats and oils. As for the scheme for connecting larger grease traps using ventilation. Please watch it here. kzbin.info/www/bejne/aJDceIawfMeGsK8

We don't have a vent in ours. But we are in a mall kiosk. But now we are getting the funk smell when we drain our sinks.

@@splatz0ne Thank you for your question. An unpleasant odor is caused by food and fat residues accumulated in the sewer system. The only effective way to decompose organic matter and, as a result, eliminate the smell is biological products. We recommend using tablets TM Beseder made in the USA. If you use a grease trap, we recommend checking the tightness of the pipes and the quality of the rubber seals and locks of your grease trap. If you use a grease trap TM Beseder, write to us by email and we will send you a rubber seal for free.