Microline 335 - User Manual

Questions and Answers

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Troy IbarraAug 15, 2025
How to reduce high Total Dissolved Solids (TDS) in Microline Water System product water?
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  Daniel ThompsonAug 15, 2025
  To address high Total Dissolved Solids (TDS) in the product water of your Microline Water System, begin by replacing any clogged sediment/carbon prefilter. Ensure that the feed water pressure is above 40 psig. Inspect the R.O. membrane O–ring for crimping and check the R.O. membrane brine seal to ensure it's properly sealing up into the manifold head. If the membrane life is unusually short, identify and correct the underlying issue before replacing the membrane.
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floresmindyAug 18, 2025
How to get rid of tastes and odors in Microline Water System product water?
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  Seth NortonAug 18, 2025
  To eliminate tastes and odors in the product water of your Microline Water System, start by replacing the exhausted activated carbon post filter. If there's foreign matter in the holding tank, clean, flush, and sanitize the system, and replace the filters. Ensure the product water and drain water lines are correctly plumbed. If dissolved gasses are present in the feed water, pretreat it to remove them. Also, check for an increase in product water TDS, referring to the high TDS section for guidance.
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Karina LynnAug 25, 2025
How to fix low pressure at the dispensing faucet of my Microline Water System?
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  Wayne AndersonAug 26, 2025
  If the Microline Water System's dispensing faucet has low pressure, start by checking the activated carbon post filter for clogs and replace it if necessary. Ensure the air precharge in the holding tank is correctly set by emptying the water and adjusting the air pressure to 5–7 psig. Make sure the holding tank valve is fully open. The dispensing faucet itself might be faulty, requiring repair or replacement. If there's been heavy water use, allow the holding tank to refill, or consider adding a second tank to increase storage capacity. Finally, check for low water production, referring to the 'Low Quantity of Product Water from Holding Tank' section for solutions.
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Louis LyonsAug 28, 2025
What to do if high Total Dissolved Solids (TDS) persists in Microline Water System product water?
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  Derek JohnsonAug 28, 2025
  To address continued high Total Dissolved Solids (TDS) in the product water of your Microline Water System, first ensure that the product water and drain water lines are correctly plumbed. Clear or replace the drain restrictor if it's clogged, and do the same for the drain orifice in the air gap faucet if it's plugged. If the ASO valve isn't closing, repair or replace its components. For a new activated carbon post filter, flush it with several full tanks of product water. Keep in mind that an increase in feed water TDS will lead to a corresponding increase in product water TDS.
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William MaloneAug 31, 2025
What does the amber light mean on my Microline Water System's water quality monitor?
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  Jason HobbsAug 31, 2025
  To resolve an amber light on the optional water quality monitor of your Microline Water System, first try emptying the storage tank and waiting 15 minutes for the system to begin making water before testing the water quality again. If the issue persists, the filters may be plugged, or the membrane may be fouled or exhausted, requiring replacement of the filters and/or membrane.
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Katherine WrightSep 3, 2025
How to stop drain water overflow from the Microline Water System air gap faucet?
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  Matthew MooreSep 4, 2025
  If drain water overflows at the air gap faucet of your Microline Water System, check for and clear any blockage in the air gap. Also, inspect the drain tubing for clogs and clear them. Ensure the drain clamp hole is properly aligned with the hole in the drain pipe. If the drain flow rate is excessive, replace the drain restrictor.
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Faith AndersonSep 7, 2025
Why is my Microline Water System faucet leaking or dripping?
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  Christina MitchellSep 7, 2025
  To address faucet leaks or drips in your Microline Water System: For leaks from the spout, adjust the faucet by turning the tee bar just below the handle to provide a small amount of free play in the handle when shut off. If O–rings are bad, repair or replace the faucet. For leaks from the base of the delivery tube, replace the O–ring. If leaks come from beneath the handle, the O–rings are bad, so repair or replace the faucet.
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Christopher PughSep 12, 2025
What to do about fitting leaks in my Microline Water System?
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  Michael WilsonSep 12, 2025
  Close the feed water saddle valve and relieve pressure before disconnecting any tubing or replacing any fitting. Before replacing a fitting, re–cut the tubing and re–insert it into the fitting to see if that solves the leak. If pipe threads are leaking, remove and retape with Teflon tape.
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Bailey JacksonNov 20, 2025
Why is there a low quantity of product water from my Microline Water System holding tank?
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  jenniferrothNov 20, 2025
  If you're experiencing a low quantity of product water from your Microline Water System's holding tank, several factors could be at play. First, check if the feed water saddle valve is either plugged or closed; if so, open or unclog it. Another potential issue is clogged sediment/carbon prefilter or an activated carbon post filter, which would require filter replacement. Ensure your feed water pressure is above 40 psig. A fouled R.O. membrane could also be the culprit, requiring you to check the feed water operating limits and replace the membrane if needed. Also, check the air precharge pressure in the holding tank, adjusting it to the 5–7 psig range after emptying the tank with the faucet open. A ruptured air bladder in the holding tank necessitates tank replacement. Confirm that the hol...