Staff Answer
Jul 23, 2026 - 08:30 AM
The gallon per day (gpd) rating on a membrane filter, such as a 50 GPD RO Membrane, specifies how much water it can purify within 24 hours. A 50 GPD membrane filters about 4 ounces of water per minute, so your storage tank refills at this rate. For best results and membrane longevity, your system uses a compatible flow restrictor, which regulates the water sent to the drain, preventing clogging and maintaining efficiency. If you upgrade to a 50 GPD RO Membrane from a different capacity, it’s crucial to also replace the flow restrictor with one matched to the new membrane’s flow rate to ensure proper system function and optimal filtration performance.
