DEMA 801GAP User Manual (English)

Questions and Answers:

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Ralph BuchananAug 2, 2025
How to fix DEMA Dispenser proportioner not drawing chemical properly?
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  Donald WalkerAug 2, 2025
  If your DEMA Dispenser's proportioner isn't drawing chemical properly, first ensure you have at least 20 PSI of water supply pressure. If the pressure is too low, consult a plumber to increase it. Also, check the foot valve and proportioner metering tip for dirt or chemical buildup; soak them in hot water to clean. Mineral deposits on the air gap nozzle can also cause this issue; soak the nozzle and inlet screen in hot water or a product like CLR to remove the deposits. Finally, if you have the 4 GPM bucket fill side with a slow water stream, remove the flow disc assembly from the lower section of the water valve assembly, if installed.
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Dr. Andrea PhillipsAug 7, 2025
Why are the threaded connections leaking water on my DEMA Dispenser?
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  Melissa Fowler MDAug 7, 2025
  If the threaded connections on your DEMA Dispenser are leaking water, first, shut off the water supply. Then, carefully tighten the female hose coupling on the blend center to the inlet water supply line. Be careful not to overtighten. Also, check if backflow prevention devices and/or proportioners are too loose and tighten them with tools if necessary, again being careful not to overtighten.
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browndanielleAug 12, 2025
What to do if DEMA Dispenser water valve is leaking?
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  Stephen BlairAug 12, 2025
  If your DEMA Dispenser's water valve is leaking, start by shutting off the water supply. Hand-tighten the enclosing hose nut, but avoid overtightening it with any tools. Also, check the valve o-ring connections; during valve reassembly, these seals may have been pushed out of place or be missing.
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jamesjohnsonAug 16, 2025
Why is my DEMA Dispenser “Air Gap” proportioner dripping or spraying water?
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  David PrinceAug 17, 2025
  If the "Air Gap" proportioner of your DEMA Dispenser is dripping or spraying a mist of water, it's likely due to mineral deposits on the air gap nozzle. Soak the nozzle and inlet screen in hot water or a product like CLR to clean and remove these deposits.