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A Pentair 36 gallon-per-day residential thin film composite (TFC) membrane, for standard sized membrane housings.

36 GPD production membranes have been phased out by Filmtec and Pentair. We currently use and recommend the 50 GPD membrane for our black and white systems. Upgrading is simple, but it requires replacing the drain line flow restrictor with the correct 420ml/min restrictor. We are happy to include this item at no charge for existing customers with our Black & White systems. Please make a comment during checkout that you are upgrading and we will include it.