Marlo Incorporated RO-25T User Manual (English)

Questions and Answers:

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Carolyn MartinAug 4, 2025
Why is there high total dissolved solids (T.D.S.) in Marlo Incorporated RO-25T product water?
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  umoodyAug 4, 2025
  Several factors can cause high total dissolved solids in the product water. The sediment/carbon prefilter might be clogged, so replace it. Ensure the feed water pressure is above 40 psi. Inspect the R.O. membrane O-ring and brine seal. If the membrane life is unusually short, find and correct the problem, then replace the membrane. Also, verify that the product water and drain water lines are correctly plumbed.
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Christopher HopkinsAug 8, 2025
What to do if there is low pressure at the dispensing faucet of Marlo Incorporated RO-25T Water System?
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  Jerry GriffinAug 8, 2025
  If you're experiencing low pressure, the activated carbon post filter might be plugged, so replace it. Check and adjust the air pre-charge in the holding tank to the 5-7 psi range after emptying the water. Ensure the holding tank valve is fully open. The dispensing faucet itself might be faulty and need repair or replacement. If there has been heavy water use, allow the holding tank to refill; consider adding a second holding tank to increase storage capacity.
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larrysantiagoAug 13, 2025
How to resolve continued high total dissolved solids (T.D.S.) in Marlo Incorporated Water System product water?
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  emorrisAug 13, 2025
  If high total dissolved solids persist, check the following: ensure there is drain flow and clear or replace the drain restrictor if clogged. Also, clear or replace the air gap faucet if the drain orifice is plugged. Repair or replace the A.S.O. valve components if the A.S.O. valve is not closing. If you've recently installed a new activated carbon post filter, flush it with several full tanks of product water. Be aware that an increase in feed water T.D.S. will result in a corresponding increase in product water T.D.S.
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Peggy LamAug 16, 2025
Why does Marlo Incorporated Water System product water have tastes and odors?
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  Yvette MullinsAug 17, 2025
  Tastes and odors in the product water can arise from several causes. The activated carbon post filter may be exhausted, requiring replacement. Foreign matter in the holding tank can also contribute; in this case, clean, flush, and sanitize the system, and replace the filters. Ensure that the product water and waste water lines are not reversed by checking the plumbing. Dissolved gasses in the feed water may also be the cause, pre-treat feed water to remove dissolved gasses.
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Sandra BairdAug 21, 2025
How to stop Marlo Incorporated RO-25T faucet leaks or drips?
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  Robert BatesAug 21, 2025
  If the faucet leaks from the spout, adjust it by turning the tee bar just below the handle to provide a small amount of free play in the handle when shut off. For leaks from the base of the delivery tube, the O-ring is likely bad and needs replacement. If leaks occur from beneath the handle, the O-rings are also likely bad, requiring you to repair or replace the faucet.