High vs. Low-Pressure Gas Systems: What Pool Builders Need to Know
Choosing between a high-pressure and low-pressure gas system is a critical decision for pool builders. The right system ensures that pool heaters, fire features, and outdoor kitchens operate efficiently without gas shortages or costly rework. This guide explains the differences between the two systems and how to determine which is best for your project.
1. Understanding the Differences
✅ Low-Pressure Gas Systems (Standard Residential)
Delivers gas at 7 inches of water column (WC) (~0.25 psi)
Typically used for most residential applications
Requires larger pipe sizes to compensate for lower pressure
✅ High-Pressure Gas Systems
Delivers gas at 2 psi or higher, requiring regulators to step down pressure
Allows for smaller pipe sizes due to increased pressure
Commonly used when multiple high-BTU appliances are installed
2. Which System Works Best for Pool Heaters and Fire Features?
Pool Heaters:
Most pool heaters under 400,000 BTUs operate on a standard low-pressure system
If the heater is far from the meter, a high-pressure system may be needed to avoid upsizing the pipe
Fire Features:
Fire pits, fire bowls, and outdoor fireplaces can demand more BTUs than pool heaters
Many require high-pressure gas for consistent flames and performance
Undersized lines can cause weak flames or appliance malfunctions
3. Cost Considerations for Upgrading to a High-Pressure System
✅ Advantages of High-Pressure Gas:
Allows for smaller pipe diameters, reducing material costs
Provides better performance for long gas runs
Supports multiple appliances without gas pressure drops
🚧 Potential Costs to Consider:
May require regulators at each appliance to step down pressure
Not all gas meters are rated for high-pressure, requiring a meter upgrade
Some jurisdictions have permit restrictions on high-pressure systems
4. Working with a Plumber to Get the Right Setup
✅ Before Construction Begins:
Verify gas pressure availability with the gas company
Determine total BTU demand of all gas appliances
Confirm local code requirements for high-pressure installations
✅ During Installation:
Use the correct pipe sizing charts for high- vs. low-pressure systems
Ensure regulators and shut-off valves meet code requirements
Perform pressure testing before backfilling trenches
Pool Builder Gas System Selection Checklist
✅ Confirm gas pressure availability with the gas company
✅ Determine total BTU demand for pool heaters and fire features
✅ Choose between high-pressure or low-pressure based on appliance needs
✅ Verify local codes and permit requirements
✅ Ensure correct pipe sizing for pressure type
✅ Install regulators where needed for high-pressure setups
✅ Perform pressure tests before backfilling
✅ Work with a licensed plumber to ensure compliance
Need expert guidance on choosing the right gas system? Contact Wildflower Plumbing & Gas at (512) 292-1966 or email info@wildflowerplumbing.com for expert assistance!