🌊 Pentair SuperFlo® VST 1.5 HP Variable Speed Pool Pump | EC-342001

💧 Cut Your Pool Pump Energy Costs by Up to 80% — The Smart Upgrade That Pays for Itself

📋 Product Overview

The Pentair SuperFlo® VST Variable Speed Pool Pump (EC-342001) is a dependable, energy-efficient pump built for everyday pool owners who want serious savings without the complexity. Powered by a 1.5 HP (2.2 THP) variable speed motor, this pump automatically adjusts its speed to match your pool’s needs — slashing energy costs by up to 80% compared to traditional single-speed pumps.

What sets the SuperFlo VST apart is its dual-voltage flexibility. It automatically recognizes and adapts to 115V or 230V power (50/60 Hz) with no expensive rewiring required. That makes it one of the most installation-friendly variable speed pumps on the market. Designed as a direct drop-in replacement for the Hayward® Super Pump® and existing Pentair SuperFlo models, this pump fits right into your current setup with 1-1/2″ plumbing connections.

Whether you’re building a new pool or upgrading an aging single-speed pump, the SuperFlo VST delivers whisper-quiet operation, ENERGY STAR® certified efficiency, and the proven reliability Pentair is known for — all backed by a 2-year warranty when professionally installed.

⭐ Key Features

✅ Variable Speed Energy Savings — Reduces energy consumption by up to 80% compared to single-speed pumps by moving water more efficiently at lower speeds.

✅ Dual-Voltage Flexibility (115V/230V) — Automatically recognizes and adapts to your existing electrical setup. No costly rewiring needed — one of the only variable speed pumps with this capability.

✅ Ultra-Quiet TEFC Motor — The Totally Enclosed Fan-Cooled (TEFC) permanent magnet motor runs whisper-quiet and resists harsh temperatures, chemicals, and environmental wear for a longer service life.

✅ Simple Digital Control Keypad — Three programmable speed settings plus an override/Quick Clean mode. The intuitive display shows watts, RPM, and remaining program time so you always know what’s happening.

✅ Built-In Real-Time 24-Hour Clock — Set it and forget it. No need for a separate external timer — the onboard clock handles scheduling automatically.

✅ RS-485 Connectivity — Improved interface compatibility with pool automation systems and IoT devices for more flexible remote control options.

✅ Direct Drop-In Replacement — Superior drop-in replacement for the Hayward® Super Pump® and existing Pentair SuperFlo pumps. Standard 1-1/2″ slip connections fit most in-ground pool plumbing.

✅ Improved Mechanical Seal — Engineered for long, leak-free, dependable performance even under continuous operation.

✅ ENERGY STAR® Certified — Meets strict energy efficiency criteria set by the U.S. EPA and Department of Energy. May qualify for local utility rebates.

✅ Eco Select® Brand — Recognized by Pentair as one of their greenest and most efficient product choices.

🔧 Technical Specifications

💰 Usage Costs & Running Expenses

📊 Annual Running Cost Calculation — SuperFlo VST at Low Speed

The biggest advantage of a variable speed pump is running it at lower speeds for longer, which uses dramatically less electricity while still providing excellent filtration.

Energy Rate Used: $0.1778 per kWh — U.S. national average residential electricity rate (Source: Choose Energy February 2026 Electricity Rates Report, based on latest EIA data from November 2025. chooseenergy.com/electricity-rates-by-state/)

Assumptions stated:

• 20,000-gallon in-ground pool (standard residential)
• Pool season: 6 months (180 days) — typical for most of the continental US
• Low-speed filtration: running at approximately 1400 RPM (Preset Speed 2)

At Low Speed (~1400 RPM) — Typical Daily Filtration:

Independent bench testing of the SuperFlo VS at 240V shows approximately 264 watts power draw at 1500 RPM and approximately 188 watts at 1250 RPM. Using a conservative mid-range estimate of ~225 watts (0.225 kW) for low-speed daily filtration:

• ⚡ Power draw: ~0.225 kW (estimated at low-speed operation)
• ⏱ Usage: 12 hours/day × 180 days = 2,160 hours/year
• ✅ Annual cost: 0.225 kW × 2,160 hrs × $0.1778 = approximately $86.50 per year

Bench test power consumption data source: SwimmingPoolSteve.com (240V Pentair SuperFlo bench test with dual suction lines, published November 2025). Note: Actual power consumption varies based on plumbing configuration, pool size, head pressure, and voltage. These figures are from independent bench testing and may differ from your specific installation.

📊 Cost Comparison: Variable Speed vs. Single-Speed Pump

A typical 1.5 HP single-speed pool pump draws approximately 1,200 watts continuously at full speed.

❌ Single-Speed Pump (1.5 HP, ~1,200W):

• Power: 1.2 kW × 2,160 hours/year = 2,592 kWh
• ❌ Annual cost: 2,592 kWh × $0.1778 = $460.85 per year

✅ Pentair SuperFlo VST at Low Speed (~225W):

• Power: 0.225 kW × 2,160 hours/year = 486 kWh
• ✅ Annual cost: 486 kWh × $0.1778 = $86.41 per year

💵 Annual Savings: approximately $374 per year 💰 Energy Reduction: approximately 81%

Single-speed power consumption reference: Trouble Free Pool forum (troublefreepool.com), citing single-speed Pentair on 115V at approximately 10.5A / ~1,200W. Energy rate: $0.1778/kWh, U.S. national average residential rate, EIA data via Choose Energy (February 2026).

🏊 Year-Round Pool Scenario (Warmer Climates)

For pool owners in Florida, Arizona, Texas, or Southern California who run their pump year-round:

• ⏱ Usage: 10 hours/day × 365 days = 3,650 hours/year

❌ Single-Speed (1.2 kW):

• ❌ Annual cost: 1.2 × 3,650 × $0.1778 = $778.85 per year

✅ SuperFlo VST at Low Speed (~0.225 kW):

• ✅ Annual cost: 0.225 × 3,650 × $0.1778 = $146.04 per year

💵 Annual Savings: approximately $632 per year

🎯 Real World Examples & Applications

🏊‍♂ Standard Residential Pool Upgrade

The SuperFlo VST is purpose-built for everyday in-ground pools up to approximately 20,000 gallons. If you’re replacing a tired single-speed pump — especially a Hayward Super Pump or older Pentair SuperFlo — this is a direct bolt-in swap. Standard 1-1/2″ slip connections match existing plumbing, and the dual-voltage motor means no rewiring costs. Expect dramatically quieter operation from day one.

🔄 Hayward Super Pump® Replacement

One of the most common upgrades in the industry. The SuperFlo VST is specifically designed as a superior drop-in replacement for the Hayward Super Pump. Same footprint, same connections, but with variable speed savings and modern digital controls. Many pool owners report the pump practically pays for itself within 1-3 years through energy savings alone.

🏠 DIY-Friendly Installation

The easy-access wiring compartment and automatic voltage detection (115V or 230V) make this one of the most straightforward variable speed pump installs available. The intuitive keypad with three preset speeds gets you up and running quickly. The built-in 24-hour clock eliminates the need for a separate timer.

☀ Seasonal Pool Operation (Northeast, Midwest)

Pool owners who run their system 5-6 months per year benefit significantly from variable speed technology. Running at low speed during the day for basic filtration and stepping up to a higher speed for vacuuming or when running water features gives you both savings and performance when you need it.

🌊 Pools with Water Features

The Quick Clean / Override mode at 3450 RPM delivers full power when you need it for water features, waterfalls, or spa spillovers. Then the pump drops back to an energy-sipping low speed for standard filtration — giving you the best of both worlds.

💡 Cost Savings Examples

📍 Scenario 1: Replacing a 1.5 HP Single-Speed Pump (6-Month Season)

• ❌ Old single-speed pump annual cost: ~$461/year
• ✅ SuperFlo VST annual cost at low speed: ~$86/year
• 💵 Annual savings: ~$374/year
• 📈 3-Year savings: ~$1,122
• ⏱ Payback period: Approximately 3-4 years (based on pump purchase price, not including potential utility rebates)

Calculation basis: 12 hrs/day, 180 days/year, $0.1778/kWh (EIA national average). Single-speed at 1,200W vs. variable speed at ~225W low-speed operation.

📍 Scenario 2: Year-Round Pool Owner (Florida, Arizona, Texas)

• ❌ Old single-speed pump annual cost: ~$779/year
• ✅ SuperFlo VST annual cost at low speed: ~$146/year
• 💵 Annual savings: ~$633/year
• 📈 3-Year savings: ~$1,899
• ⏱ Payback period: Under 2.5 years

Calculation basis: 10 hrs/day, 365 days/year, $0.1778/kWh. Same power consumption assumptions.

📍 Scenario 3: High Electricity Rate States (California, Connecticut, Massachusetts)

In states where residential rates exceed $0.30/kWh, the savings are even more dramatic:

• ❌ Old single-speed pump annual cost at $0.30/kWh: 2,592 kWh × $0.30 = $777.60/year
• ✅ SuperFlo VST at low speed at $0.30/kWh: 486 kWh × $0.30 = $145.80/year
• 💵 Annual savings: ~$631/year

Rate reference: States with average residential rates above $0.30/kWh include California ($0.3191), Connecticut ($0.3030), and Massachusetts (per Choose Energy February 2026 report, based on EIA data).

⚠ Important Note: All cost calculations above use estimated power consumption figures from independent bench testing (SwimmingPoolSteve.com) and verified energy rates (EIA via Choose Energy). Your actual savings will vary based on your specific pool size, plumbing configuration, local electricity rates, daily run time, and installation conditions. Pentair’s official claim of “up to 80% energy savings” is based on comparison to a single-speed pump running 12 hours per day at $0.16/kWh in a 20,000-gallon pool.

📥 Downloads & Resources

📄 SuperFlo VST Variable Speed Pump Brochure (English) — Complete product overview with performance curves and features Download PDF from Pentair

🏆 Why Choose the Pentair SuperFlo VST?

✅ Proven Variable Speed Savings — Pentair pioneered variable speed pool pump technology. The SuperFlo VST delivers real, measurable energy savings backed by ENERGY STAR certification and independent testing.

✅ No Rewiring Hassle — Automatic 115V/230V voltage detection means you can upgrade from your old pump without the added cost and complexity of new electrical work.

✅ Whisper-Quiet Operation — The TEFC permanent magnet motor runs so quietly at low speeds you’ll barely know it’s there. No more loud pump noise disturbing your backyard.

✅ Built to Last — Improved mechanical seal, corrosion-resistant construction, and a motor designed to withstand harsh pool environments means years of trouble-free service.

✅ Smart and Simple Controls — Program your speeds, set your schedule, and let the built-in clock handle the rest. The display shows real-time watts, RPM, and countdown — so you’re always in control.

✅ Industry-Leading Brand — Pentair is one of the most trusted names in pool equipment worldwide. Parts, service, and support are readily available across the USA.

🛒 Why Buy From Parts4Tubs?

✅ Fast shipping across the USA

✅ Expert customer support from real pool & spa professionals

✅ Competitive pricing with no hidden fees

✅ Hassle-free returns and warranty support

✅ Trusted by thousands of American pool and spa owners

✅ Secure checkout and multiple payment options

✨ Summary

The Pentair SuperFlo® VST (EC-342001) is the smart choice for any pool owner looking to cut energy costs, reduce noise, and upgrade to proven variable speed technology — without the hassle of rewiring or replumbing. With ENERGY STAR® certification, a built-in timer, three programmable speeds, and a rock-solid TEFC motor, this pump delivers day-in, day-out reliability and savings you can measure on every electric bill.

Order now and start saving up to 80% on your pool pump energy costs!

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	Magic Plastics Union 0602-15 (1.5″ Pump Union) | 1-1/2″S x 1-1/2″FBT Union, Pump, Magic, 1-1/2"S x 1-1/2"FBT (Industry Standard) w/ O-Ring	$6.36 Max: 586 Min: 1 Step: 1 Add to cart
	Magic Plastics Union 0602-20 (2″ Pump Union) | 2″S x 2″FBT w/ O-Ring Union, Pump, Magic, 2"S x 2"FBT (Industry Standard) w/ O-Ring	$8.00 Max: 535 Min: 1 Step: 1 Add to cart
	Waterway Union 400-6010 | 2-1/2″ Union Nut with 2-1/2″ Slip tailpiece and o-ring (2.5″ union) Union, Pump, Waterway, 2-1/2"FBT x 2-1/2"S	$14.77 Max: 150 Min: 1 Step: 1 Add to cart
	1 Speed Pump / Blower / AMP Cord | 21086 Amp Plug, Pump, 1-Speed, 14/3, 4-Pin, 5' Cord, White	$24.71 Max: 341 Min: 1 Step: 1 Add to cart
	Balboa Amp Plug 21087 (For 2 Speed Pumps) Amp Plug, Pump 1 (2-Speed) 14/4, 72" Long, White	$31.72 Max: 174 Min: 1 Step: 1 Add to cart

Hot Tub Pump Collar & Union Size Chart

Imperial & Metric Specifications

Union Size	Collar Size	Thread OD	Union OD	O-Ring Size
1.5" Female Buttress Thread (FBT)	2.5" / 64mm (Tip to Tip) Measurement	2-1/2" 64mm	2-13/16" 71mm	2-5/16" OD 59mm
2" Female Buttress Thread (FBT)	3.1" / 78mm (Tip to Tip) Measurement	3-1/16" 78mm	3-3/8" 81mm	2-15/16" OD 75mm
2.5" Female Buttress Thread (FBT)	3.6" / 91mm (Tip to Tip) Measurement	3-5/8" 91mm	4-1/4" 108mm	3-7/16" OD 87mm

Important Notes

The union "size" (1.5", 2", 2.5") is nominal and doesn't correspond to any actual measurement.

Collar size is measured from thread tip to thread tip on the pump outlet.

Most hot tub pumps use Female Buttress Thread (FBT) - 98% of applications.

O-ring gaskets may vary between manufacturers - measure your existing gasket for accuracy.

How do I Replace a Hot Tub Pump?

Here's a general step-by-step guide on how to replace a hot tub pump. Keep in mind that the specific steps may vary depending on your hot tub's make and model, so it's essential to consult your hot tub's manual for model-specific instructions. If you're not comfortable with this procedure, it's a good idea to seek professional assistance.

Materials You'll Need:

• Replacement pump
• Pipe wrench
• Adjustable wrench
• Screwdriver
• Pipe sealant (thread tape or plumber's putty)
• PVC primer and cement (if you have PVC plumbing)
• Teflon tape (for threaded connections)

Procedure:

1. Turn Off the Power: Before you begin, ensure the hot tub's power supply is turned off at the circuit breaker or disconnect switch. Safety should always be a priority when working with electrical components.

2. Drain the Hot Tub: If your hot tub is not already empty, you'll need to drain it. Follow your hot tub's manual or manufacturer's instructions for proper draining. (You might not need to do this if you can lock the pump off with the gate valves)

3. Locate the Pump: Identify the location of the existing pump in your hot tub. It's usually located near the equipment area or in a designated pump compartment.

4. Disconnect the Electrical Wiring: Carefully disconnect the electrical wiring from the old pump. This typically involves removing the electrical conduit cover, unscrewing wire nuts, and disconnecting the wires from the terminals. Be sure to note the wire connections or take a picture for reference when connecting the new pump.

5. Disconnect the Plumbing: Depending on your hot tub's plumbing setup, you'll need to disconnect the plumbing connections to the pump. Use a pipe wrench or adjustable wrench to loosen and remove the fittings. Be prepared for some water spillage when disconnecting the plumbing.

6. Remove the Old Pump: Once the electrical and plumbing connections are detached, carefully remove the old pump from its mounting position. Some pumps may be secured with mounting brackets or bolts.

7. Prepare the New Pump: If the new pump is not pre-assembled, you may need to attach fittings, unions, or adapters to match your hot tub's plumbing. Ensure that you use the appropriate sealant or Teflon tape on threaded connections to prevent leaks.

8. Mount the New Pump: Position the new pump in the same location as the old one and secure it in place using the mounting brackets or bolts.

9. Reconnect Plumbing: Reconnect the plumbing to the new pump, ensuring that all connections are tight and secure. If your hot tub uses PVC plumbing, use PVC primer and cement to bond the connections properly.

10. Reconnect Electrical Wiring: Reconnect the electrical wiring to the new pump, following the notes or pictures you took earlier. Make sure all wires are properly connected and secure.

11. Turn On the Power: Restore power to the hot tub by switching on the circuit breaker or reconnecting the disconnect switch.

12. Test the Pump: Turn on the hot tub's pump to ensure that it's working correctly. Check for any signs of leaks or irregularities in the plumbing connections.

13. Refill the Hot Tub: Once you've confirmed that the new pump is functioning properly, refill the hot tub with water.

14. Check for Leaks: Inspect the plumbing connections for any leaks. If you find any, turn off the pump, drain the tub again, and reseal the connections as needed.

15. Monitor: Keep an eye on the pump and plumbing for the next few days to ensure everything is functioning correctly and that there are no further issues.

Remember that this is a general guideline, and the specific steps may vary based on your hot tub's design. If you're unsure or uncomfortable with any aspect of this process, please do get in touch, happy to help.

How do I know what size hot tub pump I have?

Determining the size of your hot tub pump is an important step when it comes to maintenance or replacement. To find out the size of your hot tub pump, follow these steps:

1. Check the Manual: The easiest way to determine the size of your hot tub pump is to consult the owner's manual or user documentation that came with your hot tub. The manual typically contains detailed information about the specifications and components of your hot tub, including the pump.

2. Look at the Pump Housing: If you don't have access to the manual or it doesn't provide the information you need, inspect the pump itself. Most hot tub pumps have a label or plate on the pump housing that displays essential details, including the pump's model number, manufacturer, and specifications. You can then send that to me or Google it.

3. Measure the Pump: If the label is missing or damaged, you can measure the pump's dimensions. Measure the diameter of the pump's wet end (the part where the water flows) and the length of the wet end. These measurements can help identify the size and capacity of the pump.

4. Consult the Manufacturer: If you can't find the information on the pump or in the manual, contact the hot tub manufacturer or a reputable dealer. Provide them with your hot tub's model and serial number, and they should be able to identify the correct pump size for your specific hot tub.

5. Online Research: You can also search online using the pump's model number or hot tub's make and model. Many manufacturers provide detailed information about their products on their websites, and you may find specifications for your pump model.

Once you have determined the size and specifications of your hot tub pump, you can proceed with maintenance, repairs, or replacement if necessary. Keep in mind that replacing a hot tub pump with the same size and capacity as the original is crucial to ensure proper water circulation and filtration in your hot tub. If you're unsure about any aspect of this process, get in touch, always happy to help.