1. What is Water Meter Sizing?

Water meter sizing determines the appropriate meter diameter based on peak flow requirements and fixture unit calculations. Proper sizing ensures accurate water measurement and adequate flow capacity for residential needs.

2. How Does the Calculator Work?

The calculator determines meter size based on peak flow rate:

Where:

• Peak Flow Rate — Maximum expected water flow in gallons per minute
• Fixture Units — Total fixture units calculated for the residence

Explanation: The calculator uses industry-standard flow rate thresholds to recommend appropriate meter sizes for residential applications.

3. Importance of Proper Meter Sizing

Details: Correct meter sizing prevents pressure loss, ensures accurate billing, maintains adequate flow for all fixtures, and complies with plumbing codes and water utility requirements.

4. Using the Calculator

Tips: Enter peak flow rate in gallons per minute (gpm) and total fixture units. Both values must be positive numbers. Consult plumbing codes for fixture unit calculations.

5. Frequently Asked Questions (FAQ)

Q1: What are typical fixture unit values?
A: Common values: toilet 4 FU, shower 2 FU, sink 1 FU, dishwasher 2 FU, washing machine 3 FU.

Q2: How do I calculate peak flow rate?
A: Peak flow can be estimated from fixture units using conversion tables or calculated based on simultaneous fixture usage patterns.

Q3: What happens if I undersize the meter?
A: Undersizing can cause pressure loss, reduced flow to fixtures, and potential meter damage from excessive flow rates.

Q4: Are there different meter types?
A: Yes, common types include positive displacement, turbine, compound, and electromagnetic meters, each with different flow characteristics.

Q5: Do local codes affect meter sizing?
A: Yes, always check local plumbing codes and water utility requirements as they may have specific sizing criteria.