Suction cup with brass disc 3/4"

APM brass disc sucker is suitable for self-priming pumps, drawing water from wells, water tanks or other water sources, where water can be drawn from such a pump.The vacuum cleaner is equipped with a fine stainless steel mesh. The mechanism that opens and closes has a metal disk with a rubber seal. The suction cup is in the closed position, it opens from the water pressure, and then it closes automatically when the pump is stopped. The connecting thread is 3/4"internal.