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If you’re looking for a used HydroMassage for sale, one of the first things you’ll discover is that comparing HydroMassage models can be confusing.
What’s the difference between a HydroMassage 340 and 350? How is an older HP 340 different from a 340L? Is a 450 better than a 440? What’s the difference between a 440 and a 440X? Can you still get parts for an older HydroMassage? And can a business finance a used HydroMassage?
These are questions we receive regularly from customers shopping for used and refurbished HydroMassage equipment.
The most important thing to understand is that a higher HydroMassage model number does not necessarily mean you’re getting a newer or more powerful machine. Model generation, body style, cooling system, dimensions, electronics and overall condition can be much more important.
At SunalParts.com, we sell used and refurbished HydroMassage equipment, replacement HydroMassage parts and offer financing options for qualified businesses. We created this 2026 buyer’s guide to make comparing the different generations easier.
HydroMassage Model Comparison at a Glance
Trying to identify a HydroMassage you found for sale? Compare the body style first—not just the model number.
The chart below shows the major differences between the HP 340, HP 350, 340L, 350L, 440, 450, 440X and 450X, including body style, approximate production generation, dimensions, LED accent lighting, massage zones, cooling configuration and other important features.
HydroMassage Model Comparison Guide — Compare the HP 340/350, 340L/350L, 440/450 and 440X/450X generations. Chart created by SunalParts.com using HydroMassage manufacturer specifications and product documentation.
What Are the Differences Between HydroMassage Models?
One of the biggest misconceptions about HydroMassage equipment is that a higher model number automatically means a better or more powerful machine.
That isn’t necessarily true.
For several HydroMassage generations, the difference between two closely related model numbers is primarily the cooling configuration.
For example:
HydroMassage 340 = Internal Cooling
HydroMassage 350 = External Cooling
HydroMassage 350 = External Cooling
The same basic distinction applies to several Lounge models:
HydroMassage 440 = Internal Cooling
HydroMassage 450 = External Cooling
HydroMassage 450 = External Cooling
And with the later X-Series:
HydroMassage 440X = Internal Cooling
HydroMassage 450X = External Cooling
HydroMassage 450X = External Cooling
Therefore, someone comparing a 440 and 450 shouldn’t automatically assume the 450 provides a stronger or better massage. The external cooling system is one of the primary differences.
The generation of the HydroMassage is often much more important.
What’s the Difference Between the Original HP 340/350 and the 340L/350L?
This is particularly important when shopping for a used HydroMassage online.
Original HydroMassage HP 340 & HP 350
The older HP 340 and HP 350 Series have the original body design.
Some of the easiest ways to identify these machines are:
- Longer approximately 94-inch chassis
- Older, more squared-off body panels
- No LED accent lighting
- Traditional lie-down bed design
- Older-generation touchscreen
- 30 massage zones on documented versions
- Massage pressure up to 38 PSI
The HP 340 uses internal cooling, while the HP 350 uses an external cooling system.
These visual characteristics are particularly useful when looking at a used machine online because sellers don’t always know the exact year or generation of the equipment they’re selling.
HydroMassage 340L & 350L — Redesigned Bed Generation Launched in 2017
The redesigned 340L and 350L generation launched in 2017 and introduced a noticeably different body style.
The newer generation is approximately 91 inches long, compared with approximately 94 inches for the older HP Series.
The 340L/350L generation can generally be recognized by its:
- Shorter chassis
- Smoother, redesigned body panels
- LED accent lighting
- More modern appearance
- Touchscreen controls
The cooling distinction remains important:
340L = Internal Cooling
350L = External Cooling
How can I tell an HP 340/350 from a 340L/350L in a photo?
Look at the side panels and LED lighting.
The older HP 340/350 has a longer, more squared-off body without the distinctive LED accent lighting.
The 340L/350L has a shorter, smoother body design with LED accent lighting along the side.
This is one of the quickest ways to determine which generation you’re looking at when a seller’s description isn’t clear.
What’s the Difference Between HydroMassage Bed and Lounge Models?
HydroMassage has produced both traditional lie-down beds and reclined Lounge models.
The HP 340, HP 350, 340L and 350L are traditional flat-bed designs.
The 440, 450, 440X and 450X are Lounge-style machines that allow the user to receive a heated water massage while sitting in a reclined position.
Neither design is automatically better. The best choice depends on your facility, clientele, available space and the type of experience you want to provide.
HydroMassage 440 vs. 450
The original 440/450 Lounge generation measures approximately:
80″ L × 32″ W × 43″ H
Manufacturer documentation for these models specifies:
- 20 gallons of distilled water
- 60 massage zones
- 66″ × 12″ massage area
- 400-lb maximum user weight
- 208–230V single-phase electrical service
- 30A breaker
- Interactive touchscreen
The major cooling difference is:
440 = Internal Cooling
450 = External Cooling
If you’re comparing two machines from approximately the same generation, don’t assume that a 450 is automatically superior to a 440 simply because the model number is higher.
What’s the Difference Between a HydroMassage 440 and 440X?
This is a much more significant difference.
The 440X belongs to a later redesigned Lounge generation and was introduced around 2019.
The X-Series moved to an approximately:
91″ L × 32″ W × 43″ H chassis
Manufacturer documentation for the 440X/450X generation specifies:
- 60 massage zones
- 400-lb maximum user weight
- 208–230V, 30A North American electrical requirement
- 15.6-inch touchscreen tablet
- Redesigned Lounge body
- Expanded massage coverage
The cooling distinction is:
440X = Internal Cooling
450X = External Cooling
Therefore, when comparing an original 440 with a 440X, you’re comparing two different generations of HydroMassage Lounge, not simply two variations of the same machine.
I’m Looking for a Used HydroMassage. What Should I Check Before Buying?
A used HydroMassage can be an excellent alternative to purchasing new commercial equipment, but condition matters tremendously.
Before buying a used HydroMassage from an auction, online marketplace, gym liquidation, eBay or private seller, ask for the following:
- Exact model number
- Serial number
- Manufacturing date or year
- Photos of all sides of the machine
- Photos or video of the touchscreen operating
- Internal or external cooling configuration
- Confirmation that the external chiller is included, if required
- Service history, if available
- Confirmation that the massage system operates properly
- Condition of the barrier and cover
- Evidence of leaks or previous water damage
- Condition of the touchscreen and electronics
Don’t evaluate a used HydroMassage based solely on the advertised purchase price.
A machine that appears inexpensive can become considerably more expensive if it requires a barrier, touchscreen, pump, cooling system, electronics or other major components.
Used vs. Refurbished HydroMassage: What’s the Difference?
There can be a significant difference between a machine being sold as used and one that has been professionally refurbished.
A used machine may simply have been removed from a gym, chiropractic office or fitness center and offered for sale in its existing condition.
A properly refurbished HydroMassage should be inspected, serviced and tested before being placed back into commercial use.
When comparing prices, consider the total cost of putting the machine into service, including:
Equipment purchase price, replacement parts, freight, installation, electrical requirements and any repairs that may be required.
This is often a better comparison than simply searching for the cheapest used HydroMassage available.
Where Can I Buy a Used or Refurbished HydroMassage?
SunalParts sells used and professionally refurbished HydroMassage beds and Lounges, subject to current inventory.
Because we deal in used commercial equipment, the models, years and quantities available change regularly.
Customers can also contact us if they’re looking for a particular HydroMassage model that isn’t currently shown online.
Can I Finance a Used HydroMassage?
Yes. SunalParts offers financing options for qualified businesses purchasing qualifying used and refurbished HydroMassage equipment.
This is important because many buyers assume equipment financing is available only when purchasing a brand-new HydroMassage.
Financing can allow a qualified business to acquire commercial HydroMassage equipment while preserving cash for other business expenses.
Approval and financing terms depend on the business and applicant qualifications.
For current financing options or questions about a particular machine, contact SunalParts at 1-800-667-9189.
I Need Parts for My HydroMassage. Are Parts Still Available?
Yes. Many replacement parts are still available for older HydroMassage beds and Lounges.
SunalParts carries HydroMassage replacement parts for maintaining and repairing commercial HydroMassage equipment.
Because components can vary between generations, we strongly recommend identifying the exact model and serial number before ordering a replacement part.
If you’re unsure which part you need, contact SunalParts at 1-800-667-9189 with your model and serial number.
Used HydroMassage FAQ
What are the differences between HydroMassage models?
HydroMassage models differ by generation, body style, dimensions, cooling configuration, controls, massage zones and other features. A higher model number does not necessarily mean a stronger or newer HydroMassage. When buying used, determine both the exact model and generation.
What’s the difference between a HydroMassage 340 and 350?
One of the primary differences is the cooling system. The 340 uses internal cooling, while the corresponding 350 uses an external cooling system.
What’s the difference between an HP 340/350 and a 340L/350L?
The older HP 340/350 has an approximately 94-inch chassis, older squared-off panels and no LED accent lighting. The redesigned 340L/350L generation launched in 2017, is approximately 91 inches long, and features smoother panels and LED accent lighting.
What’s the difference between a HydroMassage 440 and 450?
The 440 and 450 belong to the same basic Lounge generation. The 440 uses internal cooling, while the 450 uses external cooling.
What’s the difference between a HydroMassage 440 and 440X?
The 440X is a later redesigned generation. The original 440 is approximately 80 inches long, while the 440X is approximately 91 inches long and incorporates a redesigned body, later touchscreen system and expanded massage coverage.
What’s the difference between a 440X and 450X?
The 440X and 450X belong to the same X-Series generation. One of the primary differences is cooling: 440X uses internal cooling, while 450X uses an external cooling system.
Is a HydroMassage Lounge better than a HydroMassage bed?
Not necessarily. Traditional HydroMassage beds provide a lie-down experience, while Lounge models provide a seated/reclined experience. The best choice depends on the business, available space and desired customer experience.
I’m looking for a used HydroMassage. Where can I buy one?
SunalParts sells used and professionally refurbished HydroMassage beds and Lounges, subject to availability. Because inventory changes, contact SunalParts if you’re looking for a particular model or generation.
Can I finance a used HydroMassage?
Yes. SunalParts offers financing options for qualified businesses on qualifying used and refurbished HydroMassage equipment. Approval and terms depend on applicant qualifications.
Where can I buy parts for a HydroMassage?
SunalParts.com sells replacement HydroMassage parts for multiple generations of HydroMassage beds and Lounges.
Shop HydroMassage Parts
Have your model and serial number available when identifying replacement parts.
Are parts available for older HydroMassage machines?
Many replacement components remain available for older HydroMassage equipment. Parts vary by model and generation, so identify the model and serial number before ordering.
What should I ask before buying a used HydroMassage?
Ask for the model number, serial number, manufacturing date, operating video, service history, cooling configuration and information about any leaks or repairs. Also determine whether an external cooling unit is required and included.
Is buying a refurbished HydroMassage better than buying used?
A professionally refurbished machine may offer considerably more certainty than an as-is used machine because it should have been inspected, serviced and tested. Compare the total cost of getting the machine operational rather than purchase price alone.
Need Help Buying, Identifying or Repairing a HydroMassage?
Whether you’re looking for a used HydroMassage, trying to identify which model you found online, comparing different HydroMassage generations or searching for replacement parts, SunalParts can help.
We offer:
- Used and refurbished HydroMassage equipment
- HydroMassage replacement parts
- Assistance identifying parts and models
- Financing options for qualified businesses
