The Everpure BTA-16 PLUS is a 16-gallon buffer tank assembly designed for optimal performance with the 'HF PLUS' (high flow plus) model BWS series reverse osmosis systems. Featuring a 1" inner diameter, this assembly effectively manages reverse osmosis pump operation, ensuring consistent water flow and pressure. Ideal for replacement needs, the BTA-16 PLUS enhances the efficiency and reliability of your water purification system.