How to Choose the Correct Hot Tub Circulation Pump The Spa Guy

Summary

In this video, the Spa Guy breaks down how to identify and select the right circulation pumps for hot tubs. He explains the differences between circulation pumps and jet pumps, highlighting key features such as amperage, voltage, frame size, and discharge types. Various popular pump models, including Aqua Flow, LX, Grumpus, Tiny M, and Lane, are examined for their specifications, installation options, and interchangeability. The guide emphasizes practical tips for determining pump compatibility, retrofitting alternatives, and understanding wiring setups, providing viewers with clear, actionable advice for choosing and maintaining low-flow, energy-efficient circulation pumps that operate 24/7 through the heater system.

Takeaways

• 😀 Circulation pumps are low flow pumps typically operating at 25 to 35 gallons per minute and consume minimal energy, usually under 1.5 amps.
• 😀 A key characteristic of circulation pumps is that they are designed to run 24/7, making them low-energy and continuous operation devices.
• 😀 To identify a circulation pump, check the amperage on the label. If it's below 1.5 amps, it's likely a circulation pump. Anything higher is usually a jet pump.
• 😀 Circulation pumps commonly have 48-frame designs and are often labeled with the Aqua Flow, Waterway, or LX brand names.
• 😀 The size of the discharge and union fittings on the pump is an important factor in identification. Most circulation pumps use 1.5-inch discharge and 2-3/8 inch union fittings.
• 😀 Voltage is another important identifier. Circulation pumps can be either 115V or 230V, and the label will indicate the required voltage for operation.
• 😀 If you're replacing a circulation pump, ensure the new one matches the specifications like voltage, discharge size, and amperage.
• 😀 Some circulation pumps have side or center discharge options. Knowing this will help in finding a compatible replacement.
• 😀 The Grumpus pump is a popular alternative to circulation pumps and is considered by some to be more reliable and cost-effective, but it requires a retrofit kit for replacement.
• 😀 Jet pumps are generally high-amperage pumps used intermittently, unlike circulation pumps that run continuously. They typically have higher amperage ratings (6-12 amps).
• 😀 When in doubt, use the physical measurements of the pump's frame. A 48-frame will measure around 5-7/8 inches across the back, helping distinguish it from larger jet pumps.

Q & A

What is the primary purpose of a circulation pump in a spa or hot tub?

The primary purpose of a circulation pump is to circulate water through the heater continuously, 24/7, ensuring proper water flow and low energy consumption.

How can you distinguish a circulation pump from a jet pump based on amperage?

Circulation pumps typically have amperage less than 1.5 amps, while jet pumps usually have higher amperage, ranging from 6 to 12 amps.

What are the common brands of circulation pumps mentioned in the video?

Common brands include AquaFlow, Waterway, LX (Chinese version), Lane, Grumpus, and Tiny M (Waterway product).

What is the standard frame size for most circulation pumps, and how can it be measured?

Most circulation pumps are 48-frame, and the width across the back measures approximately 5 7/8 inches.

What are the typical voltage options for circulation pumps?

Circulation pumps typically operate at 115 volts or 230 volts, and the voltage is indicated on the pump label.

What are the two main discharge types for circulation pumps, and what are their sizes?

The two main discharge types are side discharge and center discharge. Center discharge is usually 1.5 inches in thread size, measuring about 2 3/8 inches across, while side discharge can be rotated and is flexible in orientation.

How can you identify a Lane circulation pump?

A Lane circulation pump typically has a corded plug, a model number like SM99 NHW18, and a 3/4-inch or 1-inch barb for water connection.

What practical steps are required to retrofit a Grumpus pump in place of a Lane pump?

To retrofit a Grumpus pump, you may need a changeover kit, adjust the pump orientation, modify plumbing connections, and reconnect the electrical cord using crimp connectors and a screwdriver.

Why should you not rely solely on model numbers to identify circulation pumps?

Model numbers can change and be updated by manufacturers, which may lead to misidentification. Voltage, amperage, frame size, and discharge type are more reliable indicators.

What distinguishes a 'Tiny M' circulation pump from other pumps?

The Tiny M pump is a Waterway product with 1-inch by 1-inch unions, comes in 115V or 220V, and can be interchangeable with proper plumbing connections.

What are the differences between a jet pump and a circulation pump regarding operation through the heater?

Circulation pumps run continuously through the heater at low flow, while jet pumps can run through the heater but are usually higher flow and not 24/7. Jet pumps may be single or two-speed, whereas circulation pumps are generally single-speed.

How can you check if a circulation pump is low-flow or high-flow?

Low-flow circulation pumps are designed for around 25–35 gallons per minute, whereas high-flow pumps like jet pumps have larger wet ends and higher amperage, indicating they are not low-flow circulation pumps.