What action should be taken if the product water total dissolved solids exceed 1000 psid?

When the total dissolved solids (TDS) in product water exceed 1000 psid, this indicates that the reverse osmosis (RO) system is experiencing issues related to membrane fouling or scaling. Cleaning the RO vessels is the appropriate action because it directly addresses the buildup or blockage that is causing the increase in TDS levels.

Over time, membranes can accumulate sediments, organics, and microorganisms that hinder their ability to effectively filter the water. Cleaning the RO vessels with the proper cleaning solutions can restore their function and efficiency, ultimately reducing the TDS levels back to acceptable ranges. Regular maintenance and cleaning are essential to the longevity of RO membranes and overall system performance.

In contrast, replacing RO vessels could lead to unnecessary costs and delays, as cleaning may often restore functionality without the need for replacement. Similarly, backwashing a multimedia filter or replacing a bag filter does not directly rectify the problem within the RO membranes themselves, as these components serve different functions within the overall water treatment process.