📥 Downloads & Resources

📄 Installation Manual — 48/56 Frame Executive, EX2 & Viper Pumps (PDF) — Official Waterway installation instructions, wiring guide, troubleshooting, and exploded view diagram

🔩 Waterway Executive 48 Spa Pump — 2.0 HP 2-Speed 230V (3420820-1A)

American-made reliability with powerful jet performance and whisper-quiet operation

♨️ Product Overview

The Waterway Executive 48 (3420820-1A) is a 2.0 HP, 2-speed jet pump designed, engineered, and manufactured in the USA by Waterway Plastics of Oxnard, California. Built around a purpose-designed Executive wet end with a large 6-1/2 inch diameter for higher head pressure and energy efficiency, this 48-frame pump delivers powerful 3,450 RPM high-speed jet action and quiet 1,725 RPM low-speed filtration and circulation. The motor draws 10.5 amps on high speed and 2.6 amps on low speed at 230V/60Hz, and is thermally protected to extend its life expectancy. The wet end features silicone carbide seals with Viton bellows and 316 stainless steel casing, providing superior corrosion resistance against chlorine, bromine, and salt systems. The versatile wet end can be rotated every 90 degrees for easy installation alignment with your existing spa plumbing. Includes two Waterway unions (model 400-9230). Backed by a 2-year manufacturer warranty on the motor and a 3-year warranty on the wet end.

⭐ Key Features

• ✅ 2.0 HP Dual-Speed Motor — High speed (10.5A) for powerful jet massage, low speed (2.6A) for quiet filtration and circulation
• ✅ Made in the USA — Designed, engineered, and manufactured by Waterway Plastics in Oxnard, California
• ✅ Executive Wet End — Large 6-1/2 inch diameter wet end specifically designed for 48-frame motors, delivering higher head pressure and energy efficiency
• ✅ Silicone Carbide Seal System — Viton bellows and 316 stainless steel casing for superior corrosion resistance against chlorine, bromine, and salt
• ✅ Thermal Overload Protection — Automatic motor protection extends life expectancy and prevents overheating damage
• ✅ Rotatable Wet End — Can be rotated every 90 degrees for flexible installation with multiple plumbing orientations
• ✅ 2-Inch Plumbing Connections — Male union thread connections (approximately 3 inch outside diameter) for 2-inch plumbing
• ✅ 48 Frame Design — Compact motor frame suitable for tight spa equipment compartments
• ✅ Dual Warranty — 2-year manufacturer warranty on motor, 3-year warranty on wet end

🔩 Technical specifications

⚠️ Note: Waterway reserves the right to change motors used in their OEM pumps at any time. Capacitor location may be external or internal depending on the motor manufacturer supplied. Flow rate (GPM) and maximum head (ft) specifications — please refer to the manufacturer’s performance curve available at waterwayplastics.com or contact Parts4Tubs for details.

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🔧 Parts and fittings for this

⚡ Electrical Requirements

Wiring Notes (Per Waterway Manual 810-0061):

• For wiring instructions, refer to the wiring diagram on the motor nameplate or on the back of the terminal cover.
• Applied voltage must correspond to the rated voltage indicated on the marking plate.
• All wiring must conform to local, state, and/or national codes.
• Ground motor prior to connecting electrical power. Do NOT ground to a gas supply line.
• 2-Speed models: Do NOT wire both speeds to run simultaneously.

⚠️ IMPORTANT ELECTRICAL SAFETY:

• 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.
• Improper grounding can cause serious injury and damage to the motor, voiding the warranty.
• If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer or its service agent.
• The pump cord is NOT included. Use your existing pump cord or purchase a compatible replacement.

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🔗 Compatibility Guide

This Pump:

• 📍 Frame: 48 Frame
• 📍 Wet End Diameter: 6-1/2 inches
• 📍 Discharge: 2 inch — Side Discharge (rotatable every 90°)
• 📍 Suction: 2 inch — Center Suction
• 📍 Thread OD: Approximately 3 inches
• 📍 Unions: Waterway male union threads — use Waterway tailpiece assemblies for best connection

Union Compatibility Note:

There is no industry standard for pump unions. Various brands have their own unique style and thread size. The unions provided with this Waterway pump may differ from your existing unions. Installation may require cutting off old unions and installing the new Waterway unions shipped with the pump. If your heater is directly coupled to the spa wet end, the union may not be compatible — verify before ordering.

Other Executive 48-Frame Models in This Series (Manufacturer Data):

Part Number	HP	Amps (High/Low)	Weight
3420620-1A	1.5 HP	8.0 / 2.6 A	30 lbs
3420820-1A	2.0 HP	10.5 / 2.6 A	33 lbs
3421221-1A	3.0 HP	8.5 / 2.8 A	36 lbs
3421821-1A	4.5 HP	12.0 / 3.5 A	37 lbs

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🛠️ Installation Requirements

Mounting (Per Waterway Manual 810-0061):

Requirement	Specification
Mounting Position	Horizontal, on level surface
Location	Must be installed below water surface (flooded suction)
Base Surface	Level surface, clear of direct water with adequate floor drainage
Ventilation	Motor louvered openings must be free from debris and obstructions
Shut-Off Valves	Should be installed on both inlet and outlet for future maintenance

Plumbing:

Connection	Size
Suction (Inlet)	2 inch (Waterway male union threads)
Discharge (Outlet)	2 inch (Waterway male union threads, side)
Unions Included	Not included — 2x Waterway 400-9230 sold separately (accepts 1-1/2″ PVC pipe)

Plumbing Notes (Per Waterway Manual):

• Use Waterway tailpiece assemblies for best connection. Unions allow pump removal for service without disturbing the plumbing.
• HAND TIGHTEN UNIONS ONLY — Do NOT use a wrench or any adhesives or solvents.
• Do NOT use pipe dope. Use only Teflon tape or other sealing compounds approved for use with plastic. Some pipe dopes will cause stress cracking of plastic parts.
• Pressure tests should not exceed 40 PSI.

Installation Notes:

• ⚠️ Pump must be installed below water level (flooded suction)
• ⚠️ Do NOT run the pump without water — if pump fails to prime within 30 seconds, turn it off and check for air lock, clogged plumbing, or closed valves
• ⚠️ Ensure proper grounding and bonding per NEC requirements
• ⚠️ GFCI protection is required by code for all hot tub and spa installations

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🔧 Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal plate and union connections
Inspect unions	Monthly	Hand tighten only if needed; check for drips
Keep motor clean	Ongoing	Ensure louvered openings are free from debris and obstructions
Check amperage draw	Annually	Should match rated values (10.5A high / 2.6A low) within 10%
Inspect mounting	Quarterly	Ensure pump is secure and level
Check shaft seal	Periodically	Over time, seals may become damaged or worn and must be replaced

Warning Signs — Replace Pump If:

• Unusual noise (grinding, screeching, bearing noise, or rotor rub)
• Water leaking from the seal area
• Motor repeatedly trips the circuit breaker
• Noticeably reduced water flow through jets
• Motor overheating or shutting down during operation
• Motor hums but won’t start (capacitor or winding switch failure)

Seal Replacement:

• 📍 Seal Type: PS-1100
• 📍 Seal Material: Silicone Carbide face / Viton Bellows / 316 Stainless Steel Casing
• 📍 Compatibility: Waterway Executive 48 and 56 frame pumps
• ⚠️ Replace seal at first sign of leakage to prevent motor damage

Winterization (Per Waterway Manual):

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

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot tub jet pump	Yes	Primary application — high speed for jets, low speed for filtration
♨️ Spa circulation	Yes	Low speed provides quiet filtration and circulation
🛁 Whirlpool bath	Yes	Compatible with permanently installed whirlpool bath systems using 2-inch plumbing and 230V power

⚠️ Per Waterway: This pump is for use with permanently installed pools and may also be used with hot tubs and spas if so marked. Do not use with storable pools.

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❓ Frequently Asked Questions

Q: What horsepower is this pump? A: The Waterway Executive 3420820-1A is rated at 2.0 HP per the manufacturer’s official specification sheet at waterwayplastics.com.

Q: Will this fit my hot tub? A: This pump has a 48 frame with 2-inch connections (center suction, side discharge). To confirm compatibility, check your existing pump for: (1) frame size — 48 or 56, (2) port size — 2 inch, and (3) high-speed amperage rating on the pump label. Matching amperage is more reliable than matching horsepower alone.

Q: What voltage does this pump require? A: 230V / 60Hz. All electrical installation must be performed by a licensed electrician with GFCI protection. Verify your existing voltage before ordering.

Q: Is this a single or dual speed pump? A: This is a 2-speed pump. High speed (10.5A) delivers powerful jet massage at 3,450 RPM, while low speed (2.6A) provides quiet filtration and circulation at 1,725 RPM.

Q: What size are the ports? A: Both suction (inlet) and discharge (outlet) are 2-inch Waterway male union threads. The outside diameter across the pump threads measures approximately 3 inches.

Q: Is a pump cord included? A: No, the pump cord is NOT included. You can reuse your existing pump cord or purchase a compatible replacement. When removing the power cord from an existing pump, mark your wires for “common,” “high speed,” and “low speed.” The connection diagram for the new pump is located on the motor nameplate.

Q: Are unions included? A: Yes, two Waterway model 400-9230 unions are included. These accept 1-1/2 inch PVC pipe. Note that Waterway unions may differ from other brands — you may need to cut off old unions and install the new ones.

Q: Can I rotate the discharge direction? A: Yes. The wet end can be rotated every 90 degrees by loosening the motor thru-bolts and turning the pump head, allowing the discharge to point in multiple directions.

Q: What seal does this pump use? A: The PS-1100 seal with silicone carbide face, Viton bellows, and 316 stainless steel casing. This premium seal system provides superior corrosion resistance against chlorine, bromine, and salt systems.

Q: Is this pump made in the USA? A: Yes. Waterway Plastics designs, engineers, and manufactures their Executive pumps in Oxnard, California, USA.

Q: What warranty is included? A: 2-year manufacturer warranty on the motor and 3-year warranty on the wet end. Warranty begins on the date of manufacture. Contact Parts4Tubs for full terms and warranty claims.

Q: How much does this pump weigh? A: 33 lbs per the manufacturer’s official specification.

Q: Do I need a GFCI breaker? A: Yes, GFCI (Ground Fault Circuit Interrupter) protection is required by the National Electrical Code (NEC) for all hot tub and spa installations.

🏆 Why Choose the Waterway Executive 3420820-1A

• ✅ Made in the USA — Designed, engineered, and manufactured by Waterway Plastics in Oxnard, California for over 50 years
• ✅ Powerful 2.0 HP Motor — 10.5 amps of high-speed jet pressure for an invigorating hydrotherapy experience
• ✅ Premium Seal Technology — Silicone carbide with Viton bellows and 316SS casing resists chlorine, bromine, and salt corrosion
• ✅ Thermal Overload Protection — Automatic motor protection prevents overheating and extends pump life
• ✅ Oversized 6-1/2″ Wet End — Delivers higher head pressure and greater energy efficiency than standard wet ends
• ✅ Flexible Installation — Rotatable wet end (every 90°) for straightforward plumbing connections
• ✅ Dual Warranty — 2-year motor warranty and 3-year wet end warranty from the manufacturer
• ✅ Proven Track Record — Waterway Plastics has been designing and manufacturing pool, spa, and bath equipment for over 50 years

🤝 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, wet ends, and pump parts available
• ✅ Dedicated customer service team

💫 Summary

The Waterway Executive 3420820-1A is a 2.0 HP, 2-speed, 230V American-made jet pump featuring a 48 frame, oversized 6-1/2 inch Executive wet end with premium silicone carbide/Viton/316SS seal system, and rotatable discharge for flexible installation. Thermally protected with 10.5/2.6A operation at 3,450/1,725 RPM, this 33 lb pump includes Waterway unions and is backed by a 2-year motor and 3-year wet end warranty. Order today from Parts4Tubs for fast US shipping and expert support.

Find the right pump or motor

Enter what is printed on the label of the one you are replacing. Anything that differs is shown with the difference spelled out, so you can judge it for yourself.

EitherComplete pumpMotor only

Make or modelHorsepowerVoltageAny115V230VSpeedAny1-speed2-speedVariable speedAmpsPort size (pumps)Any3/4 in1 in1-1/2 in2 in2-1/2 inFrame (motors)Any48Y48 frame56Y56J56C56 frame

Clear

Port size is the plumbing thread, not the pipe — a 2 inch union measures about 3 inches across the male thread. Amps are compared to within half an amp, since published figures round differently between motor brands. Voltage is never treated as a near miss: a 115V motor is not one step from a 230V supply. Anything whose page does not publish a figure you entered is left out rather than offered with a caveat — search it by name to see it anyway.

Unions and pump cords: pick the union size that matches your pump's ports (see the size chart below), and a 4-wire cord for a 2-speed pump.

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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 Manufacturer part number 0602-15B Returns 30-day returns – see our returns policy	$6.36 Max: 241 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 Manufacturer part number 0602-20 Returns 30-day returns – see our returns policy	$8.00 Max: 406 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 Manufacturer part number 400-6010 UPC (GTIN) 806105082176 Returns 30-day returns – see our returns policy	$14.77 Max: 81 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 Manufacturer part number 21086 Returns 30-day returns – see our returns policy	$24.71 Max: 317 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 Manufacturer part number 21087 Returns 30-day returns – see our returns policy	$31.72 Max: 416 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
• Screwdriver
• New union O-rings
• A strap wrench, only if a union nut is stuck
• PVC primer and cement, only if you are gluing in new tailpieces

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. Unscrew the union nuts by hand. If one is stuck, use a strap wrench rather than a pipe wrench, which can crack the nut. 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. Pump unions use buttress threads that seal on an O-ring, so fit new O-rings and hand-tighten the nuts. Do not use thread tape, pipe dope or sealant on them.

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, hand-tightening the union nuts. If you are gluing in new PVC tailpieces, use PVC primer and cement on those joints.

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.