Unfortunately, the provided references offer very limited information. Based on the single short excerpt, one potential method to increase tap water pressure is by utilizing a system (possibly a pump) suitable for various applications like WC systems, showers, and even electric showers experiencing slow flow.
Because the single provided reference is inadequate to give a comprehensive guide on how to increase tap water pressure, I can't provide a thorough answer to your question. I recommend searching specifically for information on water pressure booster pumps.
