Low hot water pressure from the solar water heater

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Low hot water pressure from the solar water heater is a common problem that can affect the comfort and efficiency of the system. There are several reasons that may cause this issue. Let’s look at the possible causes and their solutions.

Main Causes of Low Hot Water Pressure

  1. Salt Build-up
    • Salts from the water accumulate in the pipes or the heat exchanger, reducing the water flow.
    • Especially in areas with hard water, this is a very common cause.
  2. Clogged Networks
    • The piping network can be clogged due to corrosion or rust, restricting water flow.
  3. Cold Water Pressure
    • The pressure of the cold water directly affects the hot water flow. If the cold water pressure is low, then the hot water pressure will also be reduced.
  4. Problems with the Non-Return Valve
    • If the non-return valve is not functioning properly, it may restrict the flow of hot water.
  5. Insufficient Pipe Diameter
    • Small pipe diameter can limit the water flow, especially if the house has increased demand for hot water.
  6. Faults in the Boiler or Water Heater
    • The boiler may have wear or problems with its internal insulation, affecting its performance.
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Possible Solutions

  1. Descaling the System
    • Use special cleaning products to remove salts or call a professional for descaling services.
  2. Check the Piping
    • Check for clogged pipes or leaks and clean or replace worn parts.
  3. Install a Pressure Pump
    • If the cold water pressure is low, installing a pressure pump may solve the problem.
  4. Replace the Non-Return Valve
    • Inspect the non-return valve and replace it if it is faulty.
  5. Upgrade the Piping Network
    • Consider upgrading the piping system with larger diameter pipes or more durable materials.
  6. Regular Maintenance
    • Schedule regular maintenance by a qualified technician for checking and servicing the solar water heater.

Preventing Low Pressure

  • Water Filters: Installing filters can reduce salt accumulation.
  • Frequent Inspection: Regularly check the piping network and boiler for any problems before they worsen.
  • Choosing the Right System: Opt for high-quality solar water heaters with durable materials and reliable valves.

Conclusion

Low hot water pressure is a problem that can be easily resolved once the cause is identified. With proper maintenance and preventive measures, you can ensure the smooth operation of your solar water heater and its optimal performance.

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Thomas Karaferis
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