🔧 Gecko Aqua-Flo Circ-Master CMCP Spa Circulation Pump – 1/15 HP Single Speed 115V (02593000-2010)

Energy-efficient 24-hour circulation for crystal clear, perfectly heated spa water

💧 Product Overview

The Gecko Aqua-Flo Circ-Master CMCP (model 02593000-2010) is a premium single-speed circulation pump engineered exclusively for hot tubs and portable spas. Manufactured by Gecko Alliance under the trusted Aqua-Flo brand, this 1/15 HP, 115V pump is purpose-built for 24-hour continuous filtration duty, delivering up to 40 GPM — among the highest flow rates of any recirculation pump in the spa industry.

The CMCP features a center discharge wet end configuration with 1-1/2″ male buttress thread (MBT) connections on both suction and discharge ports. Its compact NEMA 48-frame thru-bolt motor with permanently lubricated sealed ball bearings ensures quiet, maintenance-free operation over thousands of hours. The continuous-duty design allows the Circ-Master to operate a high-flow heating system, resulting in increased heating efficiency and up to four times the filtration capacity compared to standard circulation pumps. This pump is California Title 20 Compliant and carries UL approval (E62386).

⭐ Key Features

✅ 24-Hour Continuous Duty Motor – NEMA 48-frame thru-bolt motor with permanently lubricated sealed ball bearings rated for uninterrupted operation, maximizing filtration and heat distribution

✅ High Flow Rate — Up to 40 GPM – Delivers the highest GPM of any recirculation pump in the spa industry, enabling efficient heating and superior water clarity

✅ Energy-Efficient 1/15 HP Motor – Low 1.3-amp draw at 115V/60Hz keeps operating costs minimal during 24/7 circulation, California Title 20 Compliant

✅ Center Discharge Wet End (CMCP) – Centered suction and discharge port layout for flexible installation and plumbing alignment

✅ 1-1/2″ MBT Connections – Standard 1-1/2″ male buttress thread on both suction and discharge ports (approximately 2-3/8″ outside thread diameter)

✅ Carbon-Graphite Self-Lubricating Seal – Designed specifically for continuous duty operation, providing superior leak protection over standard seals

✅ Rotatable Wet End – Wet end can be rotated in 90-degree increments to line up with existing plumbing without modifying pipe runs

✅ Quick-Release Compression Fittings – Included union fittings allow easy installation and maintenance without special tools

✅ Three Wing Nut Drain Plugs – Positioned at 3, 6, and 9 o’clock for complete drainage regardless of pump orientation

✅ UL Listed (E62386) – Independently tested and approved for safety compliance in the United States and Canada

⚙️ Technical Specifications

Specification	Value
Pump Type	Circulation Pump (24-Hour Continuous Duty)
Model Number	02593000-2010
Manufacturer	Gecko Alliance (Aqua-Flo Brand)
Series	Circ-Master CMCP
Motor Power	1/15 HP
Speed Settings	Single Speed
RPM	1,725
Motor Type	PSC (Permanent Split Capacitor)
Flow Rate (Max)	40 GPM
Maximum Head	3.8 PSI / 8.9 ft (2.7 m)
Voltage	115V
Frequency	60 Hz
Amperage	1.3A
Frame Type	NEMA 48 Thru-Bolt
Discharge Port Size	1-1/2″ MBT
Suction Port Size	1-1/2″ MBT
Discharge Position	Center
Suction Position	Center
Connection Physical OD	2-7/16″ (approximately 2-3/8″ thread to thread)
Suction Connection ID	1-11/16″
Dimensions (Approx.)	11.5″ L × 6.5″ W × 8.25″ H
Weight	15.1 lbs
Seal Type	Carbon-Graphite Self-Lubricating (Viton compatible)
Bearings	Permanently Lubricated Sealed Ball Bearings (Front & Rear)
Cord Type	None — Hardwire Installation Required
Drain Plug Locations	3, 6, and 9 o’clock
Volute Fastening	8 Screws
Wet End Rotation	90° Increments
Maximum Water Temperature	122°F (50°C)
High Ambient Temperature Rating	158°F (70°C)
Certifications	UL Listed (E62386), California Title 20 Compliant

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	115V (also referenced as 110V/120V — all standard US household voltage)
Frequency	60 Hz
Phase	Single Phase
Full Load Amps	1.3A
Cord	Not Included — Hardwire or AMP Plug Connection Required

⚠️ IMPORTANT ELECTRICAL SAFETY NOTICES:

Hot tubs and spas require GFCI (Ground Fault Circuit Interrupter) protection on the supply circuit. This is a code requirement — not optional.

Upon installation, the motor must be bonded with no smaller than #8 AWG solid copper conductor per the National Electrical Code. The bonding connection should be made from the accessible wire connector on the motor to all metal parts of the spa or hot tub structure and to all electrical equipment, metal conduit, and metal piping within 5 feet of the inside walls of the spa or hot tub.

A dedicated circuit is required — do not share with other appliances.

⚠️ Cord Not Included: This pump ships without a power cord. If your spa control system uses an AMP plug connection, a compatible 1-speed AMP cord (such as Part# 21086 or Gecko 30-0210-48-S) is available separately from Parts4Tubs.

🔄 Compatibility Guide

Frame & Mounting:

Detail	Specification
Frame Type	NEMA 48 Thru-Bolt
Wet End Style	CMCP (Center Discharge)
Suction Port	1-1/2″ MBT — Center
Discharge Port	1-1/2″ MBT — Center
Connection OD	2-7/16″ (approximately 2-3/8″ thread to thread)
Unions Included	2x White 2″ Union Nuts with 1-1/2″ Slip Tail Pieces and O-Rings

CMCP vs. CMHP — Important Difference:

The CMCP has a center discharge wet end (both suction and discharge centered). The CMHP (model 02093000-2010) has a side discharge wet end (12 o’clock position). Both share the same motor and frame, but the wet end orientation differs. Verify your existing pump’s discharge position before ordering.

Measuring Your Existing Pump Connections:

To confirm 1-1/2″ connections, measure the outside diameter of the inlet and outlet fittings on your existing pump. A measurement of approximately 2-3/8″ indicates a 1-1/2″ connection. A measurement of approximately 3″ indicates a 2″ connection. A measurement of approximately 3-5/8″ indicates a 2-1/2″ connection.

Replacement Compatibility:

This pump is a direct replacement for spa systems that use a 48-frame, 1-1/2″ center discharge circulation pump running at 115V/60Hz. It is compatible with Gecko spa control systems and many other brand controllers including those that provide a dedicated 115V circulation pump output.

🔩 Wet End Component Part Numbers

Component	Part Number
Impeller	91693601
Volute / Seal Plate	91231402
Wet End Assembly	91040810-000
Motor	K55MYGJN-8255
Shaft Seal Kit (Viton 200)	Compatible with Aqua-Flo Viton 200 seal kit (fits CMCP, CMHP, XP2, XP2e, XP3, Flo-Master HP/CP)

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🛠️ Installation Requirements

Mounting & Placement:

Requirement	Specification
Mounting Position	Horizontal (below water level — flooded suction required)
Base	Solid, level surface with vibration-dampening pad
Ventilation	Ensure all motor louver openings remain free from debris and obstructions
Access	Provide adequate clearance around pump for inspections and maintenance

Plumbing:

Connection	Size
Suction	1-1/2″ MBT
Discharge	1-1/2″ MBT
Union Type	Quick-release compression fittings (included)

Installation Notes:

⚠️ This pump must be installed below water level (flooded suction). Ensure the pump casing (volute) will be completely filled with water during operation.

⚠️ Never run the pump dry. Always verify the pump casing is filled with water before starting. Allow reasonable time for priming.

⚠️ For Aqua-Flo compression fittings, DO NOT use thread seal tape (PTFE tape), Teflon, Quick-Seal Thread Sealing Compound, Plasto-Joint Stik, or any other sealants. These fittings are designed to seal with the included O-rings only. Hand tighten only — do not use a wrench.

⚠️ The wet end can be rotated in 90-degree increments to align with your existing plumbing. Loosen the 8 volute screws, rotate to the desired position, and retighten.

⚠️ Ensure proper grounding and bonding per NEC requirements using #8 AWG solid copper conductor.

⚠️ GFCI protection is required by the National Electrical Code for all hot tub and spa installations.

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🔧 Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks around seal and unions	Monthly	Look for drips or moisture at connections
Inspect union fittings	Monthly	Hand tighten if loose — do not over-tighten
Verify motor vents are clear	Quarterly	Remove debris, leaves, or obstructions from motor openings
Check mounting bolts and base	Quarterly	Tighten if vibration has loosened
Inspect amperage draw	Annually	Should read approximately 1.3A at 115V
Clean strainer/filter basket	As needed	Remove debris to maintain flow

Warning Signs — Replace or Service Pump If:

Unusual noise such as grinding, screeching, or rattling may indicate bearing failure or impeller damage. Water leaking from the seal area means the carbon-graphite seal has worn and requires replacement. If the motor repeatedly trips the breaker, there may be an electrical fault or the GFCI is detecting a ground current — discontinue use immediately and have the pump inspected. Reduced water flow could indicate a clogged impeller, worn seal, or failing motor. Motor overheating or a burning smell indicates the motor windings may be damaged.

Seal Replacement:

The Circ-Master CMCP uses a carbon-graphite self-lubricating seal compatible with the Aqua-Flo Viton 200 shaft seal kit. Replace the seal at the first sign of leakage. Both halves of the seal (carbon and ceramic) should be replaced together every time the pump is disassembled. Ensure seal surfaces are smooth, clean, and free from damage before reassembly.

Winterization:

To prevent damage during freezing conditions, disconnect all electrical power, drain the pump thoroughly, and clean out any debris. Protect the pump and motor from the elements by covering or, if possible, store in a dry, well-ventilated room.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot tub 24-hour circulation	Yes	Primary application — designed specifically for continuous spa filtration
♨️ Spa heating loop	Yes	High GPM enables efficient heat distribution through flow-through heaters
♨️ Ozone/sanitizer distribution	Yes	Continuous circulation ensures even distribution of sanitizer throughout spa water
♨️ Chemical mixing and distribution	Yes	Constant water movement prevents chemical hotspots
🛁 Whirlpool bath circulation	See note	Designed for spa systems — verify plumbing and electrical compatibility for whirlpool applications

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❓ Frequently Asked Questions

Q: What horsepower is this pump? A: This pump is rated at 1/15 HP and draws 1.3 amps at 115V/60Hz. It is designed for continuous-duty 24-hour circulation, not for powering jets.

Q: Will this pump fit my hot tub? A: This pump uses a NEMA 48 thru-bolt frame with 1-1/2″ male buttress thread connections on both suction and discharge (center discharge configuration). Measure your existing pump’s frame size, port sizes, and discharge position to confirm compatibility. The connection OD measures approximately 2-3/8″ from thread to thread.

Q: What is the difference between the CMCP and the CMHP? A: Both use the same motor and frame. The CMCP (this model) has a center discharge wet end. The CMHP (model 02093000-2010) has a side discharge wet end with the discharge positioned at 12 o’clock. Check your existing pump’s discharge location before ordering.

Q: What voltage does this pump require? A: This model requires 115V/60Hz (standard US household voltage). A 230V version is also available (model 02593001-2010) — verify your spa’s voltage before ordering. Using the wrong voltage will damage the motor.

Q: Does this pump come with a power cord? A: No. This pump ships without a cord and requires hardwire installation or a compatible AMP plug cord purchased separately. A 1-speed AMP cord is available from Parts4Tubs.

Q: Does this pump come with union fittings? A: Yes. The pump includes 2x white 2″ union nuts with 1-1/2″ slip tail pieces and O-rings for easy installation.

Q: Can I use thread tape on the fittings? A: No. Aqua-Flo’s compression fittings are designed to seal with the included O-rings only. Do NOT use any thread seal tape, Teflon, or sealant compounds. Hand tighten only.

Q: What is the maximum flow rate? A: The CMCP delivers up to 40 GPM, which is among the highest flow rates available in spa circulation pumps.

Q: Is this pump quiet enough for 24-hour operation? A: Yes. The Circ-Master is engineered for continuous-duty quiet operation with permanently lubricated sealed ball bearings and a PSC motor design.

Q: How long does this pump typically last? A: With proper installation and maintenance, the Circ-Master CMCP typically provides years of reliable service. The permanently lubricated sealed bearings and continuous-duty carbon-graphite seal are designed for extended operational life.

Q: What seal does this pump use? A: A carbon-graphite self-lubricating seal designed for continuous duty operation. It is compatible with the Aqua-Flo Viton 200 shaft seal kit when replacement is needed.

Q: Do I need a GFCI breaker? A: Yes. GFCI protection is required by the National Electrical Code (NEC) for all hot tub and spa installations. All electrical work should be performed by a licensed electrician.

Q: Can I rotate the wet end to match my plumbing? A: Yes. The wet end can be rotated in 90-degree increments by loosening the 8 volute screws, repositioning, and retightening.

🏆 Why Choose the Gecko Aqua-Flo Circ-Master CMCP

✅ Industry-Leading Flow Rate — Up to 40 GPM delivers superior filtration and efficient heat distribution for your spa

✅ Engineered for 24/7 Operation — Continuous-duty motor, sealed bearings, and carbon-graphite seal designed for years of uninterrupted service

✅ Whisper-Quiet Performance — PSC motor with permanently lubricated sealed bearings ensures minimal noise during around-the-clock operation

✅ Energy-Efficient Design — Only 1.3 amps at 115V keeps electricity costs low even running 24 hours a day, California Title 20 Compliant

✅ Flexible Installation — Rotatable wet end in 90° increments, center discharge configuration, and included union fittings simplify replacement

✅ UL Listed Safety — Independently tested and certified (E62386) for peace of mind

🤝 Why Buy from Parts4Tubs

✅ US-based support for American customers

✅ Fast shipping across the United States

✅ Expert advice from spa and hot tub specialists

✅ Competitive pricing

✅ Full warranty support

✅ Hassle-free returns

✅ Replacement seals, cords, and parts available

✅ Dedicated customer service team

🔄 Alternate Part Numbers

This pump is also known by or cross-references to the following part numbers across various manufacturers, distributors, and spa brands:

02593000-2010 · 02593641 · 02593003-3 · 02593641-2010 · 02593641-2 · 34-402-1140 · 1-00-0202 · AF025930002010 · 5127-012 · 025930002010 · 34-402-1144 · 344021144 · 15-720-0201 · 02593000-2 · 02093492-2 · 91040800-000 · 34-402-1144N · 01306001-2100 · 02593003-3510 · 02593006-3510 · 02593007-2510 · 02593635-2000 · 02593635-2010 · 02593636-2010 · 02593641-2000 · 02593641-2010 · 02593641-3010 · 02593687-2010 · 02593687-2110 · 02593687-2510 · 02593687-3510 · 02910684-2520 · 02910684-2522 · 02910684-2580

⚠️ Note regarding part number 91040800-000: This number references the wet end assembly only — you must confirm HP and voltage compatibility before using this as a cross-reference for the complete pump.

✨ Summary

The Gecko Aqua-Flo Circ-Master CMCP (02593000-2010) is a 1/15 HP, 115V/60Hz single-speed circulation pump built for 24-hour continuous spa filtration. Delivering up to 40 GPM through a compact NEMA 48-frame design with center discharge 1-1/2″ MBT connections, this UL-listed pump features permanently lubricated sealed bearings, a carbon-graphite continuous-duty seal, and a rotatable wet end for easy installation. Energy-efficient at just 1.3 amps, the Circ-Master CMCP is the industry standard for spa circulation — order yours from Parts4Tubs today.

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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
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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.