Quote:
Originally posted by sohal1025
Some people run warm water through their ro, so it ready for top off. That will damage the membrane.
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Where did you hear that? The club had a professional filtration expert out about a year ago to do a speech at a meeting. He stated that they preheat the water going into the RO units to get optimal production. It should be 70-77 degrees if possible. If the water is cooler it will have a higher rejection rate as it makes the pores on the RO membrane close up tighter.
I have a 100ft coil of tubing inside my sump before the RO unit to help bring the input temp up from the underground temps and it also helps cool the tank water.