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Pressure Troubleshooting

IMPORTANT NOTE: Before performing service on the Home Master™ RO at any time, and for any reason: first switch to the OFF position all under-sink water valves, except for the RO sink spigot which you should switch ON to relieve system pressure and drain away excess water from the lines. Push-pull fittings are nearly impossible to remove when under pressure.

  • Leaks from metal fittings Unscrew fittings and re-tape male fitting. Tape should be wound 5-7 times around male thread. Tape should not cover opening. Use only Teflon tape. Re-tighten fitting securely. Over tightening can crush the tubing insert and cause a water blockage.
  • Leaks from quick connect, push-pull fittings Disconnect fitting by pushing in the tubing with one hand and depressing the ring on the fitting with the other hand. Then pull out tubing while the ring is still depressed. Tubing cannot be pulled out without depressing the fitting ring, and relieving system pressure. Make sure the tubing is cut is straight, the edge is completely smooth, and the tube is rounded. Scratched, gouged, damaged, or oblong tubing end WILL leak. Re-insert the tubing into the push-pull fitting. Push tubing all the way in, then pull back gently, to check fit. Most push-pull fittings take about a ½” of tubing inserted into them.
  • Leaks from plastic fittings Plastic fittings should be firmly finger tightened. Under tightening can result in leaks, over tightening can crush the tubing and result in a water blockage. For plastic fittings only; make sure the plastic tubing has an insert in the tube end, and a feral (o-ring which compresses the tubing around the insert) in the plastic female fitting. Drain tubing does not need an insert.
  • No water from Home Master™ RO System Double check to make sure there is “no water” and not ”slow flow or trickle”. Make sure all valves are set to the ON position. Check for over tightening of fittings. Eliminate possible blockage points by disconnecting each system component and checking for pressure. Have a bowl and towel at hand.
  • No water or ice from refrigerator water center Make sure line from Home Master™ RO to refrigerator has pressure. Make sure refrigerator water center and/or icemaker are turned ON, and refrigerator is plugged in. If water center works, but icemaker does not, then defrost the freezer as the line in may have frozen.
  • Hissing or flowing sounds from Home Master™ RO are normal during the water purification process. Sounds should last for approximately 1 hour per gallon of water used. Sounds should stop once the reserve tank is full. Permeate pump equipped systems will “click” and “whoosh.”
  • Weak pressure at RO sink faucet & Reserve tank filling slowly

NOTE: Seasonal changes in temperature can cause pressure imbalances within the system resulting in slow water production and/or the tank not filling correctly. Oftentimes the imbalance will correct itself on its own within a few days. You may also restore the internal system pressure balance by draining the tank, disconnecting and then reconnecting the tubing, then shutting off the system overnight. Turn it back on, and allow the tank to refill, and then shut it off again when full for another night.

NOTE: The tank will not fill, or not fill completely if there is not sufficient incoming water pressure to overcome the backpressure from the tank. That incoming water pressure is the pressure, to the filters, and after the filters; so if your filters are plugged or restricting the flow, then water pressure to the tank will be less, and therefore will be unable to fill the tank as full or at all. If it’s getting close to the time to change your filters, then that is likely the problem. Change your water filters.

  1. Make sure the reserve tank is full, and has been flushed at least twice (6.5 gallons).
  2. Make sure the angle-stop is wide open. (See Fig.4 on the instructions enclosed with your Home Master.)
  3. Check all tubing for kinks or sharp bends - this can impede the flow of water.
  4. Check reserve tank air pressure. Air valve located on the side of the tank under a cap. Use a bicycle tire pressure gauge. Tank should have 7-7.5 psi and only be tested when empty with the Home Master feed valve closed, the tank valve open and the faucet open.
  5. Check flow to the membrane housing. Turn off the water at the EZ adapter and tank, and open RO faucet valve at the sink to relieve any system pressure. Pull the black tube out of the top of the black membrane housing at the quick connect fitting. (There is only one fitting on the top of the membrane housing, the bottom has two - one white, one grey). Point the tube you have just disconnected into a pitcher and turn on the EZ adapter valve. The water flow from the tube should be fairly strong.
  6. If the flow to the membrane housing is weak (#5), then check the water flow to the sediment filter (red label) from the EZ adapter. Turn off the water at the EZ adapter and tank, and briefly turn on the RO faucet at the sink to relieve any system pressure. Disconnect the tube from the sediment filter fitting after the EZ adapter. Point the tube you have just disconnected into a pitcher and turn on the EZ adapter valve. If it is strong repeat this step for the next carbon filter in line. The flow should be strong. If the flow to the sediment filter is weak (#7), then disconnect the EZ adapter and check the rubber grommets and o-ring for proper seating and to ensure the flow is unimpeded.
  7. If the flow to the membrane housing is strong (#5), then check flow to the reserve tank. Turn off the water at the EZ adapter and tank, and briefly turn on the RO faucet at the sink to relieve any system pressure. Disconnect the tube from the reserve tank ball valve. Point the tube you have just disconnected into a pitcher and turn on the EZ adapter valve. The water flow from the tube should be a thin, but steady trickle. If there is no flow, then disconnect the tubing from the white fitting at the bottom of the membrane housing and turn on the water. If there is flow here, then you have a bad automatic shut off valve. If there is no flow, then unscrew the white fitting and turn on the water. If there is flow now, then you have a bad membrane.

Discoloration of water
The first batch of water produced from your purification system may be discolored due to the presence of carbon from the carbon filters, and a small amount of preservative. This is normal. DO NOT drink the first 6.5 gallons of water. Drinking from an un-flushed system may cause gastrointestinal discomfort, colic and/or diarrhea. Consult a physician if discomfort persists. Running out the first two tanks will effectively flush out the system, and make it ready for use. The tank is full when the hissing stops.

Air bubbles
These tiny bubbles are caused by air in the microscopic pores of the new filters and membrane, and are safe to drink. Allowing the water to stand for a few moments will allow the air bubbles to dissipate if their appearance is troubling.
As the water saturates the new filters and membrane, the air in these pores is displaced by the water. The air escapes as these tiny bubbles. The bubbles will disappear once all of the air has been replaced by water. If your faucet "burps" air, this too, will disappear. The time required for this process varies with different filters, membranes, complete systems, water pressure, water properties and frequency of use. However, in typical installations, it will diminish within 2-4 weeks. This is a very typical process and is nothing to be concerned about. When filling a glass of water allow the faucet to run for a few seconds before placing the glass under the faucet. Using a faucet with an aerator tip such as the Executive standard #919 will also help reduce the presence of the harmless tiny air bubbles. Air bubbles can also be caused by high pressure. This is refered to as cavitation. You may reduce the pressure to the system by closing the feed valve to the system a ¼ turn at a time over a period of weeks until the bubbles are gone.

Learn about Whole House Water Filters with our Whole House Filter Buying Guide.

Learn about Water Softeners in this informational page.

Learn about Reverse Osmosis Systems and view a graphic comparing contaminant and filtration size or shop for a complete Alkaline Water reverse osmosis system.

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