Check the listing for details. Ebb and Flow Hydroponics Control System Parts, 1/2” Fill Drain, 10 Pack. Condition: New. Listed at 32.50 USD. EBB AND FLOW FILL DRAIN – Ebb and Flow Drain Fittings, an essential part of your hydroponics supplies. Use as repair, replacement, or spare parts for your irrigation systemINCLUDES – 1/2” Fill Drain, 10 Pack. Threaded hydroponic watering system parts.FOR IRRIGATION SYSTEMS – Ideal for use with reservoir and flood table irrigation setups for maximum functionality and efficiency. (Additional fittings may also be purchased separately).DURABLE – Automatic irrigation equipment parts made from heavy-duty and durable plastic that’s designed to last longer than other fittings and offer great value for money.DELIVERS OXYGEN TO ROOTS – With higher oxygen levels in the root zone you will see improved growth from your plants and increased nutrient uptake, allowing you to maximize your yields.