1. What is a Pool Pump HP Calculator?

Definition: This calculator estimates the required horsepower for a pool pump based on flow rate and total dynamic head.

Purpose: It helps pool owners and professionals select the properly sized pump for efficient water circulation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower required
• \( GPM \) — Flow rate in gallons per minute
• \( TDH \) — Total Dynamic Head in feet
• 3960 — Conversion constant

Explanation: The formula calculates the theoretical horsepower needed to move water at a given flow rate against the system's resistance.

3. Importance of Proper Pump Sizing

Details: Correct pump sizing ensures energy efficiency, proper filtration, and prevents premature pump failure.

4. Using the Calculator

Tips: Enter the desired flow rate (GPM) and the total dynamic head (TDH) of your pool system. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Total Dynamic Head (TDH)?
A: TDH is the total resistance the pump must overcome, including pipe friction, elevation changes, and filter pressure.

Q2: What's a typical flow rate for residential pools?
A: Most residential pools require 40-60 GPM for proper turnover rate.

Q3: Should I round up the calculated HP?
A: Yes, pumps are typically available in standard sizes (0.5 HP, 1 HP, 1.5 HP, etc.), so round up to the nearest available size.

Q4: Does this account for pump efficiency?
A: No, this is theoretical HP. Actual required HP may be higher depending on pump efficiency (typically 50-85%).

Q5: How do I determine my system's TDH?
A: Consult a pool professional or use pressure gauges and flow meters to measure your specific system's resistance.