Aqua Systems PureChoice AQPC-435

Questions and Answers

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Mike GriffinAug 23, 2025
Why does drain water overflow at Aqua Systems PureChoice AQPC-435 Water Filtration Systems faucet?
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  Frank GuzmanAug 23, 2025
  If your Aqua Systems Water Filtration System's drain water is overflowing at the dispensing faucet, it could be due to several reasons. The air gap might be blocked, so clear the air gap. The drain tubing might be clogged, so clear the tubing. The drain clamp hole might be misaligned, so align it with the hole in the drain pipe. Lastly, there might be an excessive drain flow rate, in which case you should replace the drain restrictor.
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Andrew CollinsAug 27, 2025
How to remove bad taste from Aqua Systems Water Filtration Systems?
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  Kevin ThomasAug 27, 2025
  If you notice tastes and odors in the product water from your Aqua Systems Water Filtration System, several factors could be responsible. The in-line or activated carbon prefilter might be exhausted, requiring replacement. There could be foreign matter in the holding tank, so clean, flush, and sanitize the system, and replace the filters. Ensure that the product water and drain water lines are not reversed by correcting the plumbing. Dissolved gasses in the feed water can also cause this issue, requiring pretreatment of the feed water to remove them. Finally, an increase in product water TDS can contribute to tastes and odors, so refer to the high TDS in the product water section for guidance.
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Jody HickmanAug 31, 2025
How to fix Aqua Systems Water Filtration Systems faucet leak?
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  Jeremy BurkeAug 31, 2025
  If your Aqua Systems Water Filtration System faucet leaks or drips from the base of the delivery tube, the O-ring is likely bad and needs to be replaced.
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christopher58Sep 3, 2025
What to do if Aqua Systems PureChoice AQPC-435 fitting leaks?
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  Tina HamiltonSep 3, 2025
  To address fitting leaks in your Aqua Systems Water Filtration System, first close the feed water saddle valve and relieve the pressure before disconnecting any tubing or replacing any fitting. Before replacing a fitting, try re-cutting the tubing and re-inserting it into the fitting to see if that resolves the leak. If pipe threads are leaking, remove the fitting and reapply Teflon tape.
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Randy BennettSep 7, 2025
What causes high TDS in Aqua Systems Water Filtration Systems?
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  Mr. Leroy GarciaSep 7, 2025
  If you're experiencing high total dissolved solids (TDS) in the product water of your Aqua Systems Water Filtration System, it could be due to several reasons. The sediment prefilter or activated carbon prefilter might be clogged, so replace the filters. Ensure that the water pressure is above 40 psig. The R.O. membrane O-ring might be crimped, so check the O-ring. The R.O. membrane brine seal might not be sealing up into the manifold head, so check the brine seal. The R.O. membrane might be expended, so if the membrane life is unusually short, find and correct the problem, then replace the membrane.
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Steven SmithNov 11, 2025
How to troubleshoot low water quantity from Aqua Systems PureChoice AQPC-435 Water Filtration Systems holding tank?
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  tina57Nov 11, 2025
  If you're experiencing a low quantity of product water from your Aqua Systems Water Filtration System holding tank, several factors could be at play. Start by checking if the feed water saddle valve is either plugged or closed; if so, open or unclog it. Next, examine the sediment prefilter or activated carbon prefilter for clogs and replace them if needed. Ensure that your feed water pressure is above 40 psig. The R.O. membrane might be fouled, so inspect and correct the cause of fouling, replacing the membrane if necessary. Also, a plugged in-line activated carbon post filter could be the culprit, requiring replacement. Check that the air precharge pressure in the holding tank is within the 5–7 psig (35–48 kPa) range after emptying the tank and opening the faucet. A ruptured air bladder i...
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Kristina SanchezNov 14, 2025
Why is TDS high in Aqua Systems PureChoice AQPC-435 product water?
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  Timothy RodgersNov 14, 2025
  If you're experiencing high total dissolved solids (TDS) in the product water of your Aqua Systems Water Filtration System, several factors could be contributing. Start by checking the sediment prefilter or activated carbon prefilter for clogs and replace the filters if necessary. Ensure that the water pressure is above 40 psig. Inspect the R.O. membrane O-ring to ensure it is not crimped and check the brine seal. If the membrane life is unusually short, identify and correct the problem before replacing the membrane. Also, ensure that the product water and drain water lines are correctly plumbed. Check the drain restrictor for clogs and clear or replace it if needed. Similarly, inspect the drain orifice in the dispensing faucet for blockages and clear or replace it. If the ASO valve is not...
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Vanessa BuckNov 19, 2025
What to do if low pressure at Aqua Systems PureChoice AQPC-435 Water Filtration Systems dispensing faucet?
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  James JimenezNov 19, 2025
  If you are experiencing low pressure at the dispensing faucet of your Aqua Systems Water Filtration System, the following issues could be the cause. The in-line activated carbon post filter might be plugged and needs replacement. The air precharge in the holding tank could be too low; to fix this, empty the water from the holding tank and, with the faucet open, adjust the air pressure to be within the range of 5–7 psig (35–48 kPa). The holding tank valve might be partially closed, so ensure it is fully open. The dispensing faucet itself could be out of adjustment or faulty, requiring repair or replacement. If there has been heavy water use, the holding tank might be depleted; allow it time to refill, or consider adding a second holding tank to increase storage capacity. It's also possible ...

Summary

Introduction to the RO System

Filtration Technologies Explained

Details the Sediment, Activated Carbon, and RO Membrane filtration stages for water purification.

System Components Overview

Describes the function of the In-Line Activated Carbon Post Filter and Automatic Shutoff Valve.

System Specifications

Preparation for Installation

Major System Components

Lists all the parts that comprise the Reverse Osmosis Drinking Water System.

Recommended Installation Tools

Provides a comprehensive list of tools required for the system's setup.

Site Selection Guidelines

Discusses optimal locations for system components considering access and environmental factors.

Installation Steps

Faucet Installation

Instructions for drilling and mounting the dispensing faucet on sinks or countertops.

Water Supply and Drain Connections

Guides for connecting to water supply (saddle valve) and drain (drain clamp).

Manifold and Tank Installation

Covers mounting the main RO manifold and positioning the holding tank.

System Start Up and Sanitization

Initial startup procedures, including sanitizing the system with bleach.

Operation and Maintenance

Normal Operation Procedures

Explains how the system functions during regular use and tank refilling.

Filter Replacement and Maintenance

Details recommended intervals and procedures for changing filters, including the post-filter.

Troubleshooting Common Issues

Exploded View and Parts List