⚙️ Waterway Tiny Might Spa Circulation Pump — 1/16 HP 230V 1″ Union Side Discharge | 3312620-14

The 230V version of Waterway’s most compact, energy-efficient spa circulation pump

📋 Product Overview

The Waterway Tiny Might 3312620-14 is the 230V version of Waterway’s ultra-compact Tiny Might circulation pump — delivering the same quiet, reliable 24-hour circulation as its 115V sibling while drawing just 0.4A at 230V. This is the correct pump for spas wired on a 230V circuit that use a 1″ connection circulation pump.

Compact enough to fit virtually any equipment bay at just 10.1″ × 5.9″ × 3.4″, the Tiny Might packs a 1/16 HP motor that delivers up to 19 GPM through a large 6-1/2″ diameter wet end designed for higher head pressure than you’d expect from such a small pump. The side discharge design is up to 60% more efficient than center discharge configurations, and the wet end can be rotated 90 degrees right or left to match your existing plumbing.

The connections are 1″ MBT (male buttress thread) on both suction and discharge, with a dual-purpose design: thread on standard 1″ FBT pump unions, or glue 1/2″ I.D. PVC pipe directly into the fittings. Physical thread dimensions measure 1-15/16″ OD on the connections. The pump also uses the O-189 o-ring type. This model replaces the discontinued barb version (3312620-19) — if ordering the old barb model number, you’ll receive this union version (3312620-14) plus 2 unions and 2 barb adapters.

Built with the same quality features as the 115V version — 303 stainless steel 3/8″ motor shaft, larger motor bearings, improved ventilation, and higher capacitor rating for reliable starting. American-made by Waterway Plastics with a 1-year manufacturer warranty. Compatible with both 50Hz and 60Hz power supplies.

✨ Key Features

• ✅ Ultra-Low Power Draw — Just 0.4A at 230V for incredibly economical 24-hour operation
• ✅ 1/16 HP / Up to 19 GPM — Compact power with reliable flow for continuous circulation
• ✅ 230V / 50/60 Hz — Works on both US (60Hz) and international (50Hz) power
• ✅ 1″ MBT Union / 1/2″ Slip Dual Connection — Threaded for 1″ unions OR glue 1/2″ PVC directly
• ✅ Side Discharge Design — Up to 60% more efficient than center discharge pumps
• ✅ Large 6-1/2″ Diameter Wet End — Higher head pressure from a compact package
• ✅ 303 Stainless Steel Motor Shaft — 3/8″ diameter for improved impeller alignment and durability
• ✅ Rotatable Wet End — 90 degrees right or left for easy plumbing alignment
• ✅ Larger Motor Bearings — Extended motor life compared to earlier designs
• ✅ Higher Capacitor Rating — Easy starting even when low voltage is encountered
• ✅ Made in the U.S.A. — American-manufactured by Waterway Plastics
• ✅ 1-Year Manufacturer Warranty — Full Waterway warranty coverage

🔩 Technical Specifications

Specification	Value
Manufacturer	Waterway Plastics
Model	Tiny Might — TM-0061N22C3
SKU	3312620-14
UPC	806105066152
Pump Type	Circulation Pump — 24-Hour Continuous Duty
Motor Power	1/16 HP
Voltage	230V
Frequency	50/60 Hz
Phase	Single Phase
Amperage	0.5A (at 230V/60Hz)
Speed	Single Speed
Flow Rate	Up to 19 GPM (19 GPM @ 10 PSI max)
Suction Connection	1″ MBT (Center) — also accepts 1/2″ slip inside
Discharge Connection	1″ MBT (Side) — also accepts 1/2″ slip inside
Connection Thread OD	1-15/16″
Discharge Type	Side Discharge
Wet End Diameter	6-1/2″
Motor Shaft	303 Stainless Steel — 3/8″ Diameter
Dimensions (H × W × L)	5.9″ × 3.4″ × 10.1″
Seal Type	Mechanical — 2-Part (811-4000A metal back + 811-4000B ceramic insert)
Seal Shaft Size	3/8″
Wet End O-Ring	O-189
Wet End Rotation	90° Right or Left
Cord	NOT Included — Reuse existing or purchase separately
Unions	NOT Included — Sold Separately
Self-Priming	No — Must Be Installed Below Water Level
Made In	U.S.A.
Warranty	1 Year Manufacturer

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	230V
Frequency	50/60 Hz
Phase	Single Phase
Amperage	0.5A
Cord	NOT INCLUDED — Reuse existing or purchase separately

⚠️ IMPORTANT:

All electrical work must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and local building codes. Hot tubs require GFCI (Ground Fault Circuit Interrupter) protection. A dedicated circuit is required — do not share with other appliances.

⚠️ CRITICAL — 230V ONLY:

This pump operates on 230V. It cannot be wired for 115V. Verify your spa’s circ pump circuit voltage before ordering. For 115V applications, use the Tiny Might 115V (3312610-14) instead.

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🔄 Compatibility Guide

Tiny Might 230V vs Tiny Might 115V — Quick Comparison

Feature	Tiny Might 230V (This Pump)	Tiny Might 115V (3312610-14)
Model	TM-0061N22C3	TM-0061N11C
SKU	3312620-14	3312610-14
Voltage	230V	115V
Frequency	50/60 Hz	60 Hz
Amperage	0.4A	0.8A
HP	1/16	1/16
Flow Rate	Up to 19 GPM	14–18 GPM
Connections	1″ MBT / 1/2″ Slip	1″ MBT / 1/2″ Slip
Discharge	Side	Side
Wet End	6-1/2″	6-1/2″
Dimensions	5.9″ × 3.4″ × 10.1″	5.9″ × 3.4″ × 10.1″
Seal	811-4000A/B	811-4000A/B

💡 Same pump, different voltage. The wet end, connections, dimensions, and seal are identical. The only differences are the motor winding (230V vs 115V) and resulting amperage draw. Choose based on your spa’s electrical supply.

Waterway “Might” Circulation Pump Family — Complete Comparison

Model	HP	Voltage	Amperage	Connections	Port Config	Flow
Tiny Might 230V (This Pump)	1/16	230V	0.4A	1″ MBT / 1/2″ Slip	Center / Side	Up to 19 GPM
Tiny Might 115V (3312610-14)	1/16	115V	0.8A	1″ MBT / 1/2″ Slip	Center / Side	14–18 GPM
Iron Might 230V (3J10020-1E)	1/8	230V	0.8A	1-1/2″ MBT	Center / Side	40 GPM
Iron Might 115V (3410030-1E)	1/8	115V	1.3A	1-1/2″ MBT	Center / Side	40 GPM
Uni-Might 230V (3410020-1X86)	1/8	230V	0.8A	1-1/2″ MBT	In-Line (Top/Top)	40 GPM
Uni-Might 115V (3410030-1X)	1/8	115V	1.3A	1-1/2″ MBT	In-Line (Top/Top)	40 GPM

⚠️ CONNECTION SIZE MATTERS: The Tiny Might uses 1″ connections. The Iron Might and Uni-Might use 1-1/2″ connections. These are NOT interchangeable without replumbing.

1″ Union Options (Sold Separately)

Part Number	Description
400-1940	1″ FBT × 3/4″ Barb — for flexible hose connections
400-1990	1″ FBT × 1″ Slip — for 1″ rigid PVC plumbing
425-1010	1″ Spigot × 1″ Barb adapter

What This Pump Replaces

The 3312620-14 replaces the discontinued 3312620-19 (barb connection version). If you order under the old 3312620-19 number from retailers still listing it, you will typically receive the current 3312620-14 union version plus 2× unions (400-1990) and 2× barb adapters (425-1010) to replicate the barb connection.

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🔗 Alternate Part Numbers & Cross-References

Primary Part Numbers

Part Number	Description
3312620-14	Parts4Tubs SKU / Current Waterway Model
TM-0061N22C3	Waterway Motor / Pump Model
TM0061N22C3	Concatenated format
806105066152	UPC

Cross-Reference Numbers

Part Number	Description
300-9020	Earlier Waterway Tiny Might 230V model
609798	Alternate distributor number
WWP331262014	Distributor format
331262014	Concatenated format
9330-10S	Alternate distributor number
34-270-1020	Alternate distributor number

Discontinued / Replaced Models

Part Number	Description
3312620-19	Tiny Might 230V 1″ Barb version — DISCONTINUED, replaced by 3312620-14

Related But NOT Interchangeable

Part Number	Description
3312610-14 (Tiny Might 115V)	Same pump but 115V / 0.8A — verify voltage first
3312610-19 (Tiny Might 115V Barb)	115V with 1″ barb — currently unavailable
3J10020-1E (Iron Might 230V)	Larger pump, 1-1/2″ connections, 40 GPM
3410020-1X86 (Uni-Might 230V)	Different pump, 1-1/2″ connections, 40 GPM

Replacement Parts

Part Number	Description
811-4000	Complete seal assembly for Tiny Might
811-4000A	Seal back — metal (shaft size 3/8″, seal width 1-1/8″ OD, height 7/16″)
811-4000B	Seal ceramic insert (mating ring 7/8″ diameter, thickness 5/32″)
O-189	Wet end o-ring
400-1940	1″ FBT × 3/4″ barb union
400-1990	1″ FBT × 1″ slip union
425-1010	1″ Spigot × 1″ barb adapter

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🛠️ Installation Requirements

What’s in the Box

• ✅ Waterway Tiny Might 230V Circulation Pump
• ❌ Power cord NOT included — reuse existing or purchase separately
• ❌ Unions NOT included — purchase 400-1940 or 400-1990 separately (if needed)

Mounting

Requirement	Specification
Position	Below water level (NOT self-priming)
Orientation	Horizontal — motor must remain dry
Base	Solid, level, vibration-dampening surface
Ventilation	Ensure adequate airflow around motor housing

Plumbing

Connection	Size	Location
Suction	1″ MBT / 1/2″ Slip (1-15/16″ thread OD)	Center
Discharge	1″ MBT / 1/2″ Slip (1-15/16″ thread OD)	Side
Unions	1″ FBT — NOT included	400-1940 (3/4″ barb) or 400-1990 (1″ slip)

Connection Options

Option 1 — 1″ Unions (Most Common): Thread 1″ FBT unions onto the pump’s 1″ MBT connections. Use 400-1940 for 3/4″ barb or 400-1990 for 1″ slip.

Option 2 — Direct 1/2″ Slip: Glue 1/2″ I.D. PVC pipe directly into the pump fittings — no unions needed. This creates a permanent connection.

Option 3 — Barb Conversion: If replacing the discontinued 3312620-19 barb version, use unions (400-1990) plus barb adapters (425-1010) to replicate the barb connection.

Wet End Rotation

The wet end can be rotated 90 degrees right or left by loosening a couple of screws. This allows you to orient the side discharge to match your existing plumbing.

Wiring

The wiring diagram is located on the inside of the cover of the water-resistant electrical box on the pump. Connect wires per the diagram.

Installation Notes

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

⚠️ 230V ONLY — this pump cannot be wired for 115V. Verify your spa’s voltage before ordering.

⚠️ Cord is NOT included. Reuse the cord from your existing pump or purchase a compatible AMP, J&J, or in.link cord separately.

⚠️ Never run the pump dry — ensure the spa is filled and plumbing is primed before first startup.

⚙️ Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check for leaks at seal	Monthly	Inspect around shaft seal area
Inspect union connections	Monthly	Tighten and check o-rings if installed
Verify water flow	Monthly	Reduced flow indicates clogging or impeller wear
Inspect motor vents	Quarterly	Keep clear of debris for adequate cooling
Check mounting stability	Quarterly	Tighten if loose
Check amperage draw	Annually	Should read approximately 0.4A at 230V

Warning Signs — Replace Pump If:

• Water leaking from shaft seal area
• Unusual noise (grinding, squealing, rattling)
• Reduced or no water flow
• Motor overheating or tripping breaker
• Motor fails to start
• Visible damage to wet end or motor housing

Seal Replacement

The Tiny Might uses a 2-part mechanical seal (same on both 115V and 230V versions):

• 📍 811-4000A — Metal seal back (shaft size 3/8″, seal width 1-1/8″ OD, height 7/16″)
• 📍 811-4000B — Ceramic seal insert (mating ring 7/8″ diameter, thickness 5/32″)

⚠️ Both parts (A and B) are required to complete a seal replacement — they work as a matched pair.

Spare Parts Availability

Capacitor, wet end, fan cover, and wet end seal are all available as spare parts for the Tiny Might.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ 24/7 Spa Circulation & Filtration	✅ Yes	Up to 19 GPM continuous duty at just 0.4A
♨️ 230V Spa Systems	✅ Yes — Correct Voltage	Verify spa circ pump circuit is 230V
♨️ Low-Flow Heating Systems	✅ Yes	Ideal for spas with low-flow heater requirements
♨️ Compact Equipment Bays	✅ Yes	10.1″ × 5.9″ × 3.4″ — very compact
♨️ 1/2″ PVC Plumbing Systems	✅ Yes	Glue directly — no unions needed
♨️ 1″ Union Plumbing Systems	✅ Yes	With 400-1940 or 400-1990 unions
♨️ Replacing 3312620-19 (Barb)	✅ Yes	Add unions + barb adapters to replicate barb
♨️ 50 Hz International Applications	✅ Yes	50/60 Hz compatible
🛁 115V Spa Systems	❌ No — Wrong Voltage	Use Tiny Might 115V (3312610-14) instead
🛁 1-1/2″ Plumbing Systems	❌ No — Wrong Size	Use Iron Might or Uni-Might instead
🛁 High-Flow Applications (30+ GPM)	❌ No — Insufficient Flow	Use Iron Might (40 GPM) instead

❓ Frequently Asked Questions

Q: What’s the difference between this pump and the 3312610-14? A: Voltage only. This pump (3312620-14) is 230V / 0.4A. The 3312610-14 is 115V / 0.8A. The wet end, connections, dimensions, seal, and all other physical characteristics are identical. Choose based on your spa’s electrical supply.

Q: What is the flow rate? A: Up to 19 GPM at 10 PSI maximum. This is a low-flow circulation pump for 24-hour continuous duty, filtration, and low-flow heating — not for powering jets.

Q: How much electricity does this pump use? A: Just 0.4A at 230V — extremely economical for 24/7 operation.

Q: What size are the connections? A: 1″ MBT (male buttress thread) on both suction and discharge, measuring 1-15/16″ OD on the threads. The fittings also accept 1/2″ I.D. PVC pipe glued directly inside.

Q: Do unions come with the pump? A: No. Unions are sold separately. Use 400-1940 (1″ FBT × 3/4″ barb) or 400-1990 (1″ FBT × 1″ slip).

Q: Does a power cord come with the pump? A: No. Reuse the cord from your existing pump or purchase a compatible cord. The wiring diagram is inside the electrical box cover on the pump.

Q: I had the old 3312620-19 barb version. Will this work? A: Yes. The 3312620-19 is discontinued and replaced by this 3312620-14 union version. You’ll need to add unions (400-1990) and barb adapters (425-1010) to replicate the barb connection, or you can connect directly to 1″ union plumbing.

Q: Can the wet end be rotated? A: Yes. The wet end rotates 90 degrees right or left by loosening a couple of screws to align the side discharge with your existing plumbing.

Q: Is this the same pump as the 300-9020? A: Yes. The 3312620-14 is the current version that replaces the earlier 300-9020 and other previous Tiny Might 230V models.

Q: What’s the difference between the Tiny Might and the Iron Might? A: Connection size and flow. The Tiny Might has 1″ connections and delivers up to 19 GPM. The Iron Might has 1-1/2″ connections and delivers 40 GPM. They are NOT interchangeable without replumbing.

Q: Does this work on 50 Hz? A: Yes. This pump is rated for both 50/60 Hz, making it suitable for international applications as well as US installations.

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.

Q: What warranty is included? A: 1-year manufacturer warranty from Waterway Plastics. Contact Parts4Tubs for full terms.

🏆 Why Choose the Waterway Tiny Might 230V

• ✅ Ultra-Low Energy — Just 0.4A at 230V for maximum efficiency on 24/7 duty
• ✅ Compact Design — 10.1″ × 5.9″ × 3.4″ fits the tightest equipment bays
• ✅ Up to 19 GPM Flow — Reliable circulation for filtration and low-flow heating
• ✅ Flexible Connections — 1″ MBT unions OR 1/2″ slip — adapts to your plumbing
• ✅ Side Discharge — Up to 60% more efficient than center discharge designs
• ✅ Large 6-1/2″ Wet End — Higher head pressure from a compact pump
• ✅ 50/60 Hz Compatible — Works on US and international power supplies
• ✅ 303 Stainless Steel Shaft — 3/8″ diameter for improved impeller alignment
• ✅ Larger Motor Bearings — Extended motor life vs earlier designs
• ✅ Improved Ventilation — Cooler operation for longer service life
• ✅ Rotatable Wet End — 90° adjustment for easy plumbing alignment
• ✅ Made in the U.S.A. — American-manufactured quality
• ✅ Serviceable Seal — 2-part replacement seal available (811-4000A/B)
• ✅ Replaces Discontinued 3312620-19 — Current production model
• ✅ 1-Year Warranty — Full Waterway manufacturer coverage

🤝 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 in USD
• ✅ Full warranty support
• ✅ Hassle-free returns
• ✅ Both Tiny Might voltage versions in stock (115V and 230V)
• ✅ Complete Waterway circulation pump range available (Tiny Might, Iron Might, Uni-Might)
• ✅ Compatible unions, seals, and accessories available
• ✅ Dedicated customer service team

Need Help? Contact our team for compatibility advice — we can help you confirm the correct voltage and connection type for your spa.

💫 Summary

The Waterway Tiny Might 3312620-14 is the 230V version of Waterway’s ultra-compact circulation pump, delivering up to 19 GPM while drawing just 0.4A at 230V/50-60Hz. Featuring 1″ MBT / 1/2″ slip dual-purpose connections, side discharge for optimum flow, a large 6-1/2″ wet end, 303 stainless steel motor shaft, and rotatable wet end, this American-made pump replaces the discontinued 3312620-19 barb version and earlier 300-9020 model. Identical to the 115V version in every way except voltage and amperage. Unions and cord sold separately. Order from Parts4Tubs today with 1-year Waterway manufacturer warranty.

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.