Today on BRStv, we have new episode of BRStv Investigates. In this series we explore popular reefing theories, products, methods, and what the manuals are missing, with a focus on putting them to the test! This week we are going to examine the general advice that you need 50 PSI for an RO/DI system to operate properly. We will take a look at where this information come from and put it to test, what happens if you go under or over that from two angles, rejection and resulting TDS in the product water, as well as water production or how fast water is produced. I think we are going to uncover something interesting. We are going to test the RO/DI system we have hooked up to the BRS160. For this test we removed anything that has any potential to impact results and running strait RO without an auto shut off valve which at high enough flow rates could potentially impact product water production flow rates. To control the pressure I am using a Watts pressure reducing valve and Aquatec booster pump to get us into the higher ranges. We used all brand new filters with a GE rosave.z depth sentiment filter, BRS universal carbon blocks and 75 GPD DOW membrane. So follow along as we test out and answer today's question, provide some helpful insight, and help make reefing just bit more fun and easy for you and your tank. *Legal Stuff* The purpose and content of this video is to provide general information regarding the products and their applications as presented in the video. Aquatic sales solutions, inc. And its officers, directors, employees and agents disclaim all express or implied warranties, in any way, related to the products and their application as presented in this video, make no representation or warranty regarding the products and the application as presented in this video and shall not be liable for any direct or indirect losses or damages of any type, including but not limited to punitive damages, or from personal injury or death resulting from or in any manner related to the video, and the products in and contents of the video. The viewer expressly agrees that aquatic sales solutions, inc. And its officers, directors, employees and agents shall not be liable for any damages or losses related to the products in and content of the video and hereby agrees to hold the foregoing harmless from any such losses or damages.