At our trash can factory, bottom drainage is not treated as a simple hole. For washable models intended for hose-down cleaning, we engineer a controlled drain system that lets water leave quickly while keeping normal use leakproof. The design starts with the bottom: a shallow 1–2 degree slope directs rinse water to a recessed sump near one corner, so staff do not have to chase standing water. In rotomolded HDPE or injection-molded PP bins, this slope is built into the mold; in metal bins, the base is pressed and sealed to avoid trapped water around seams. The drain itself can be supplied in three configurations. The standard is a threaded 1/2-inch or 3/4-inch port fitted with a tool-free plug and an EPDM gasket. For heavier cleaning, we offer a stainless-steel ball valve with a tethered cap, and for low-cost units we use a push-fit drain plug with a retaining strap. The port is recessed above the floor line so the bin still sits flat and the plug is protected from dragging. A removable plastic or stainless strainer sits behind the drain to catch food scraps, labels, and debris that could clog the line; the strainer can be lifted out and rinsed separately. We also address the cleaning hose problem: water pressure and small pools. The drain sump is sized so a standard hose flow can pass through without backing up, and the sloped floor prevents puddles around the corners. On models with a sealed base cavity, we avoid exposed foam or hollow ribs that can hold dirty water. All penetrations receive gaskets, sealant, or welded collars, and the drain hardware is isolated from the load-bearing base so stepping or dragging does not distort the seal. Quality control includes a fill test and a spray test. We fill the bottom with water, let it stand, then inspect for leaks around the drain and seams; for drain-equipped bins, we open and close the plug repeatedly to confirm the gasket seals. We also run a hose-spray test to check drainage speed and confirm that water exits the intended port. Every unit ships with simple instructions: remove the strainer, open the drain, hose the bin, flush debris toward the sump, replace the strainer, and close the plug firmly. Not every trash can needs bottom drainage. Standard outdoor or street bins may be fully sealed to prevent leachate, and for those we recommend liners or internal washdown rather than bottom holes. For washable bins, drainage is an option chosen by model, material, and cleaning method. The result is a bottom that drains fast during hose cleaning but stays closed, sealed, and leak-resistant during normal waste collection.