Steve Moxon blog

​Water hardness can make everyday tasks a hassle. It leaves soap scum on your shower walls, creates stubborn stains on your dishes, and dries out your skin and hair. The solution? A water softener. But with so many options available, figuring out the right size for your home can be tricky.

Grains of Hardness and Grain Capacity: Breaking Down the Essentials

Water hardness is measured in grains per gallon (GPG). The higher the GPG, the harder your water.

• Typical hardness levels:
  • Soft: 0-3 GPG
  • Slightly hard: 3-6 GPG
  • Moderately hard: 6-12 GPG
  • Hard: 12-18 GPG
  • Very hard: 18+ GPG

Water softeners have a grain capacity, which indicates how many grains of hardness they can remove before needing to regenerate.

Factors Affecting Water Softener Size

Several factors influence the size of water softener you need:

• Number of people in your household: More people mean more water usage.
• Average daily water consumption: This includes showering, laundry, dishwashing, and other water-related activities.
• Water hardness level: The higher the hardness, the larger the softener you'll need.

How to Calculate Grain Capacity

Here's a general formula to estimate the grain capacity you need:

Number of people in household x Average daily water usage (gallons) x Water hardness (GPG) x 7 = Grain capacity

Example: A family of four uses 80 gallons of water per day, with a water hardness of 15 GPG.

They would need a softener with a grain capacity of at least 33,600.

Common Size Recommendations:

• 1-2 people: 20,000-30,000 grains
• 3-4 people: 30,000-40,000 grains
• 5+ people: 40,000+ grains

Additional Considerations:

• Iron content: If your water has high iron levels, you may need a larger softener.
• Water usage patterns: If you have periods of high water usage (e.g., frequent guests, laundry days), consider a larger softener.
• Space constraints: Ensure you have adequate space for the softener and its brine tank.

Consulting a Professional for Accurate Recommendations

For the most accurate sizing recommendations, consult a water treatment professional. They can test your water hardness and assess your specific needs.

Remember, choosing the right size water softener is essential for ensuring its effectiveness and efficiency. By understanding the factors involved and following these guidelines, you can select the perfect fit for your home.

Sources:

• Linkedin
• Medium
• Reddit

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