How often does a grease trap need to be cleaned?

Your water authority's trade waste agreement sets the legal frequency, commonly every 4 to 13 weeks for food businesses depending on trap size and how much grease the kitchen produces. A standard 1,000 litre pump-out costs $190 to $420 plus GST depending on the city, and scheduled contracts run 15 to 25 percent cheaper than one-off call-outs because the contractor can route the truck efficiently. Tip: do not stretch the cycle to save money; an overflowing trap means an emergency pump-out at a 50 to 100 percent premium.

Full ranges, drivers and sources: Grease Trap Cleaning cost guide. See also: Plumber Rates cost, Pest Control cost, Rubbish Removal cost.