This listing is for a (12) pack of automatic cup style drinker with built in floats. This model is for mounting the drinker directly to you waterer, whether it be a bucket, pail, large pipe etc. Simply drill a 3/8″ hole into your bucket and thread on your drinker. Drinker cup is a breeze to clean as it is a quick disconnect orange cup. This unit will provide many seasons of trouble free use and can be used for many different birds. Cup utilizes a float system that automatically shuts off the water source when the cup is done being filled by pecking. You can design your own drinker system and add as many cups to buckets or large pipes as you wish up to 210 drinkers per system. Drinkers work under low pressure at 5 psi or less. If you are wanting to hook your water system to garden hose pressure that is fine, but you will need a regulator in order for you to do so. We sell the regulator for reducing the pressure in our ebay store.