What Is a Constant Pressure System?
A variable-frequency drive (VFD) monitors pressure and speeds the pump motor up or down to hold a set pressure, even with multiple fixtures running.
When a VFD Upgrade Makes Sense
- Simultaneous showers, laundry, irrigation, and dishwashers
- Homes with pressure swings or frequent cycling
- Wells with variable recovery where gentler ramp-up prevents collapse
- Adding ADUs, barns, or guest suites
Benefits vs. Conventional Systems
- Steady pressure at taps
- Less wear from reduced hard starts
- Energy smart—pump only works as hard as needed
- Often uses a smaller tank
Installation & Tuning
- Load calculation and setpoint selection
- Pump compatibility and wiring review
- Controller selection sized to motor HP
- Tank pairing and setpoint tuning
- Protection programming (dry-run, voltage, surge)
VFD vs. Bigger Pump vs. Storage + Booster
| Goal | VFD | Bigger Pump | Storage + Booster |
|---|---|---|---|
| Steady household pressure | Best | Helps, may still swing | Excellent |
| Energy use | Low at low demand | Higher | Moderate |
| Aquifer protection | Good (gentle ramp) | Risk of over-pumping | Good |
| Cost/complexity | Moderate | Moderate | Higher |
FAQs
Will I still need a pressure tank? Yes, usually smaller than traditional systems.
Is a VFD noisy? Controllers are quiet; soft starts can reduce pump noise.
What pressure setpoint is best? We balance desired feel (50–70 PSI) with plumbing limits and efficiency.
Call (281) 378-7020 to discuss constant pressure options.