diy 75 gpd ro system

If you’re looking to build a DIY 75 GPD (Gallons Per Day) reverse osmosis (RO) system, here’s a general guide to help you get started:

Materials you will need:

  1. Pre-filtration system: Sediment filter (5 microns) and activated carbon filter.
  2. Reverse osmosis membrane: 75 GPD or higher.
  3. RO housing: Typically a 2.5″ x 21″ housing with appropriate fittings.
  4. RO pressure vessel: A pressure vessel capable of withstanding the operating pressure.
  5. RO pump: A pump capable of providing sufficient pressure for the RO system.
  6. Tubing: Food-grade tubing for connecting various components.
  7. Faucet: A dedicated faucet for dispensing the purified water.
  8. Pressure gauge: A pressure gauge to monitor the system’s operating pressure.
  9. Flow restrictor: A flow restrictor to control the water flow through the membrane.
  10. Miscellaneous: Mounting brackets, fittings, wrenches, Teflon tape, etc.

Step-by-step instructions:

  1. Determine the location: Select a suitable location to install your RO system, preferably near a water source, drain, and electricity outlet.
  2. Install pre-filtration: Connect the sediment filter and activated carbon filter to remove larger particles, sediment, and chlorine/chloramine from the water supply. Follow the instructions provided with the filtration system.
  3. Install the RO membrane: Install the RO membrane into the RO housing. Ensure the membrane is seated properly and securely.
  4. Connect the components: Use food-grade tubing to connect the pre-filtration system to the RO housing. Connect the outlet of the RO housing to the pressure vessel, and then connect the pressure vessel to the faucet.
  5. Install the RO pump: Install the RO pump in the system’s configuration, ensuring it’s capable of providing the required pressure for the desired water production rate.
  6. Install the flow restrictor: Install the flow restrictor on the RO membrane housing. The flow restrictor helps regulate the water flow through the membrane, ensuring optimal performance.
  7. Check for leaks: Go through all the connections and ensure they are tight and secure. Use Teflon tape on threaded fittings to prevent leaks.
  8. Test the system: Turn on the water supply and check for any leaks. Monitor the system’s operating pressure using a pressure gauge. Adjust the flow restrictor if needed to achieve the desired water production rate.
  9. Install the dedicated faucet: Install a dedicated faucet for dispensing the purified water. Follow the manufacturer’s instructions for faucet installation.
  10. Flushing and system maintenance: Flush the system for a few minutes to remove any residual impurities and ensure the water is clean. Regularly replace filters and perform maintenance as recommended by the manufacturer.

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