Pentair
Pentair 340042 SuperFlo Pump - 1HP, 230V, 2 Speed
Pentair 340042 SuperFlo Pump - 1HP, 230V, 2 Speed
Pentair 340042 SuperFlo 1 HP 230V Two-Speed In-Ground Pool Pump
The Pentair 340042 SuperFlo was a 1 HP, 230V two-speed circulation pump designed for residential in-ground pool systems. It offered high-speed operation for demanding tasks and lower-speed operation for everyday circulation, helping pool owners balance filtration performance with energy use.
Legacy Two-Speed Design
The original pump used separate high and low operating speeds to provide flexible circulation for filtration, vacuuming, heating, and general pool operation.
SuperFlo Equipment Pad Footprint
The SuperFlo platform is known for compact installation dimensions, unionized plumbing connections, and service-friendly access to the strainer basket.
Modern Variable-Speed Upgrade Path
A properly selected variable-speed pump is the preferred modern solution for most replacement installations because it allows the pump speed to match the pool's actual circulation needs.
What the Pentair 340042 Was Used For
The Pentair 340042 was used as the main circulation pump on residential in-ground pools. Its two-speed motor allowed homeowners to run the pump on lower speed for routine filtration and increase speed when higher flow was needed for functions such as vacuuming, heater operation, water features, or stronger skimmer action.
- Residential in-ground pool circulation.
- Standard filtration systems with 230V electrical service.
- Systems using 1-1/2 inch or 2 inch SuperFlo-style plumbing connections.
- Pool equipment pads with compact SuperFlo pump space requirements.
- Older timer-controlled installations using high-speed and low-speed switching.
View Pentair 342002 SuperFlo VST Replacement
Replacement Compatibility Checklist
The Pentair 342002 SuperFlo VST is the best current upgrade path for many 340042 installations, but replacement fitment must be confirmed before ordering.
- Electrical service: Confirm the existing pump is supplied with 230V power. The 340042 was a 230V-only two-speed model.
- Plumbing: Verify the existing suction and discharge plumbing, union spacing, and pipe orientation.
- Equipment-pad clearance: Confirm enough space is available for the replacement pump body and service access.
- Timer or automation: The original two-speed switch or timer should not be used to control variable pump speeds. The replacement pump needs constant power and should be programmed through its keypad or compatible automation.
- Hydraulic needs: Confirm whether the system includes a heater, salt system, spa spillover, water feature, suction cleaner, or other feature that requires a specific minimum flow rate.
Pentair 340042 SuperFlo Specifications
| Manufacturer | Pentair |
|---|---|
| Manufacturer Part Number | 340042 |
| Product Type | Two-Speed In-Ground Pool Circulation Pump |
| Motor Rating | 1 HP |
| Service Factor | 1.25 |
| Total Horsepower | 1.25 THP |
| Voltage | 230V |
| Speed Configuration | Two-Speed |
| Full Load Amps | 6.0 / 2.3 Amps |
| Plumbing Connections | 1-1/2" internal slip / 2" external slip union-style connections |
| Recommended Replacement | Pentair 342002 SuperFlo VST Variable-Speed Pump |
| Replacement Status | Discontinued complete pump; modern variable-speed replacement path available |
Important Installation Guidance
A variable-speed pump does not operate like a two-speed pump. The original 340042 relied on external high/low-speed wiring, while the SuperFlo VST uses onboard programming to set circulation speeds and schedules.
- Disconnect power at the breaker before servicing or replacing a pool pump.
- Confirm the replacement pump is wired for the correct incoming voltage.
- Do not use an old two-speed switch to change speeds on a variable-speed pump.
- Use the replacement pump's keypad, internal timer, or compatible automation system for speed control.
- Start with a lower filtration speed and raise RPM only when more flow is required.
- Verify adequate flow for heaters, salt chlorine generators, suction cleaners, and water features after installation.
- Inspect unions, O-rings, valves, and plumbing for leaks before returning the system to normal operation.
Pump sizing is based on system hydraulics, not the motor horsepower label alone. A qualified installer should verify compatibility when replacing a legacy two-speed pump with a variable-speed model.
Frequently Asked Questions
Is the Pentair 340042 still available?
What replaces the Pentair 340042?
Can I keep using my old two-speed timer?
Does the 342002 replacement fit the same plumbing?
Why is a variable-speed pump better than another two-speed pump?
