💧 LX SWP 3.5THP Variable Speed Pool Pump, 230V | Energy Star Certified

Power Your Pool Smarter — Cut Energy Costs Up to 80% With Whisper-Quiet Variable Speed Technology

📋 Product Overview

The LX SWP 3.5THP Variable Speed Pool Pump delivers professional-grade performance for in-ground swimming pools at a fraction of the operating cost of traditional single-speed pumps. Built with a high-efficiency permanent magnet motor, this pump adjusts its speed from 450 to 3,450 RPM to match your pool’s exact needs — whether you’re running daily filtration, powering water features, or doing a deep clean.

What sets the SWP390-VS apart is its triple certification: Energy Star 3.1, DOE (Department of Energy), and CEC (California Energy Commission) compliant. That means verified energy savings you can count on. With noise levels as low as 42 decibels — quieter than a typical conversation — you can run your pool equipment day or night without disturbing anyone.

Designed for American pool owners who want reliability, efficiency, and simple operation, this pump features programmable scheduling, Pentair automation compatibility, and a large transparent strainer basket for easy maintenance. Stop overpaying to run your pool.

⭐ Key Features

✅ Energy Star 3.1, DOE & CEC Certified — Meets the highest federal and state energy efficiency standards, qualifying for potential utility rebates in many areas

✅ Variable Speed Control (450–3,450 RPM) — Run at the exact speed your pool needs; lower speeds mean dramatically lower energy consumption

✅ Ultra-Quiet Operation at 42 Decibels — Quieter than a refrigerator; won’t disturb your backyard relaxation or neighbors

✅ Programmable 4-Speed Scheduling — Set custom speeds and run times for different times of day; “set it and forget it” convenience

✅ NSF 50 Certified for Safety — Independently tested and certified for swimming pool applications

✅ Large Transparent Strainer Basket — Easily inspect debris levels without removing the lid; prevents clogged lines and extends pump life

✅ Pentair Automation Compatible — Connects to Pentair control systems via RS485 signal cable for seamless smart pool integration

✅ Built-In Priming & Quick Clean Modes — Automatic priming cycle gets the pump running fast; quick clean mode provides a high-speed burst for vacuuming

✅ UV & Weather-Resistant Enclosure — Built to withstand outdoor conditions without degradation

✅ Convenient Carry Handle — Makes installation and repositioning simple

🔧 Technical Specifications

Specification	Value
Model Number	SWP390-VS
Total Horsepower (THP)	3.5 HP
Voltage	230V
Frequency	50/60 Hz
Maximum Amperage	16.0A
Speed Range	450 – 3,450 RPM
Maximum Flow Rate	172 GPM (650 L/min)
Maximum Head	85 ft (25.8 m)
Weighted Energy Factor (WEF)	7.3
Suction Pipe Size	2 inches
Suction Style	Top
Discharge Pipe Size	2 inches
Discharge Style	Center
Motor Frame	Square Flange
Pool Type	In-Ground
Pump Weight	60 lbs (27 kg)
Noise Level (Low Speed)	42 dB
Certifications	Energy Star 3.1, DOE, CEC, NSF 50
Manufacturer	Lingxiao (LX) Pump

💰 Usage Costs & Running Expenses

One of the biggest advantages of a variable speed pump is the dramatic reduction in operating costs. Here’s exactly what you can expect:

📊 Annual Running Cost Calculation

LX SWP 3.5THP Variable Speed at Typical Operating Speed:

Most pool owners run variable speed pumps at 40–60% speed for daily filtration. At 1,400 RPM (40% speed), the SWP390-VS draws approximately 375 watts.

• Power consumption: 0.375 kW
• Daily usage: 8 hours
• Annual operation: 180 days (typical pool season)
• Total annual hours: 1,440 hours
• Energy rate: $0.18 per kWh (US national average residential rate, EIA/Choose Energy, January 2026)

✅ LX SWP Variable Speed Annual Cost: 0.375 kW × 1,440 hours × $0.18 = $97.20 per year

❌ Compared to a Single-Speed 3HP Pump:

A traditional single-speed 3HP pump runs at full power constantly, typically consuming 2,400–2,700 watts.

• Power consumption: 2.5 kW (average)
• Daily usage: 8 hours
• Annual operation: 180 days
• Total annual hours: 1,440 hours
• Energy rate: $0.18 per kWh

❌ Single-Speed Pump Annual Cost: 2.5 kW × 1,440 hours × $0.18 = $648.00 per year

💵 Your Annual Savings: $550.80

That’s a savings of over 85% on pump operating costs compared to a single-speed pump running the same schedule.

⚡ Why the Massive Difference? It’s physics. The pump affinity law states that when you cut motor speed in half, energy consumption drops to just 1/8th of the original. Running slower doesn’t mean filtering less — it means filtering smarter.

🎯 Real World Examples & Applications

🏊‍♂ Residential In-Ground Pool (15,000–25,000 Gallons)

The SWP390-VS is ideal for medium to large residential pools. Run it at 1,400–1,800 RPM for 8–10 hours daily to achieve proper water turnover while keeping energy costs under $10/month during pool season.

🏊‍♂ Large Residential Pool with Water Features (25,000–40,000 Gallons)

For pools with fountains, waterfalls, or spillover spas, program Speed 3 (2,200 RPM) to power features during the day, then drop to Speed 1 (1,400 RPM) overnight for quiet, efficient filtration.

🔄 Upgrading from an Old Single-Speed Pump

If you’re replacing a 10+ year old single-speed pump, the SWP390-VS will typically pay for itself within 12–18 months through energy savings alone — faster in high-electricity-rate states like California, Connecticut, or Hawaii.

🏢 Small Commercial Applications

Suitable for small commercial pools, community pools, or HOA pools where reliable operation and energy efficiency are priorities. The programmable schedule ensures consistent filtration without manual intervention.

🌊 Pool + Spa Combinations

Use higher speeds when running the spa jets, then automatically switch to low-speed filtration when the spa isn’t in use. The 4-speed programming handles the transitions automatically.

💡 Cost Savings Examples

📍 Scenario 1: Upgrading from an 8-Year-Old Single-Speed Pump

The Situation: Your existing 2HP single-speed pump runs 8 hours daily and costs approximately $45–55/month during summer in electricity.

The Upgrade: Install the LX SWP 3.5THP Variable Speed and program it to run at 1,400 RPM for daily filtration.

• ❌ Old pump monthly cost: ~$50
• ✅ New pump monthly cost: ~$8
• 💰 Monthly savings: $42
• 📈 Annual savings: $252 (6-month season) to $504 (year-round use)
• ⏱ Payback period: 18–36 months

📍 Scenario 2: California Pool Owner (High Electricity Rates)

California’s average residential electricity rate is approximately $0.34/kWh (EIA, 2025) — nearly double the national average.

Variable Speed Pump (1,400 RPM, 8 hrs/day, 180 days): 0.375 kW × 1,440 hrs × $0.34 = $183.60/year

Single-Speed Pump (same schedule): 2.5 kW × 1,440 hrs × $0.34 = $1,224.00/year

💵 California Savings: $1,040.40 per year

📍 Scenario 3: Year-Round Florida Pool Owner

Florida pools often run year-round. With 365 days of operation at 8 hours/day:

Variable Speed Pump: 0.375 kW × 2,920 hrs × $0.18 = $197.10/year

Single-Speed Pump: 2.5 kW × 2,920 hrs × $0.18 = $1,314.00/year

💵 Year-Round Savings: $1,116.90 per year

📈 10-Year Savings: Over $11,000

📥 Downloads & Resources

📄 Product Manual — Complete installation, operation, and programming instructions for the SWP390-VS variable speed pump series (PDF)

🏆 Why Choose the LX SWP 3.5THP Variable Speed Pump

✅ Verified Energy Savings — Triple-certified (Energy Star, DOE, CEC) means real, tested efficiency — not marketing claims

✅ Whisper-Quiet Operation — At 42 dB, it’s one of the quietest pool pumps available; run it anytime without noise complaints

✅ American Pool Standards — ANSI standard 2″ fittings, 230V power, designed for US in-ground pool installations

✅ Smart Pool Ready — RS485 Pentair automation compatibility means easy integration with existing or future smart pool systems

✅ Proven Reliability — Permanent magnet motor technology delivers consistent performance with lower maintenance

✅ Outstanding Value — Premium variable speed features at a competitive price point; delivers the efficiency of pumps costing twice as much

🛒 Why Buy From Parts4Tubs?

✅ Fast Shipping Across the USA — In stock and ready to ship from our Florida warehouse

✅ Expert Customer Support — Real pool and spa professionals available to answer your questions — not just a call center

✅ Competitive Pricing with No Hidden Fees — The price you see is the price you pay

✅ Hassle-Free Returns and Warranty Support — We stand behind everything we sell

✅ Trusted by Thousands of American Pool & Spa Owners — Built on the success of BuildAHotTub.com

✅ Secure Checkout & Multiple Payment Options — Shop with confidence using credit cards, PayPal, and more

✨ Summary

The LX SWP 3.5THP Variable Speed Pool Pump delivers everything serious pool owners need: verified energy savings up to 85%, whisper-quiet 42 dB operation, and the flexibility of 4-speed programmable scheduling — all backed by Energy Star, DOE, and CEC certification. With potential annual savings of $500–$1,100+, depending on your location and usage, this pump typically pays for itself within 1–2 seasons. Stop wasting money on outdated single-speed technology.

Order now and start saving on every pool season to come!