A Grease Trap Can Keep You Out Of Trouble Kitchen grease is not a pretty sight. If you try to wash oily water down a kitchen sink there is bound to be a drain blockage. This is especially true in winter time when the oil turns into a solid grease ball very quickly. That is when you need a grease trap. Call an expert from Valley Isle Pumping. in Public bookmarkswith grease-trap-interceptors-mauiby 2 users