Zero-Gravity Elevated Plumbing

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 SubZero hot tubs are engineered from the inside out, and our Zero Gravity™ Plumbing System is a perfect example of how smarter design delivers better performance and long-term reliability—especially in cold climates. 

ZERO-Gravity Plumbing™ refers to SubZero’s elevated manifold plumbing design, where the main water distribution manifolds are positioned above the base of the spa cabinet and closer to the jets, rather than sitting on the floor of the tub.

This strategic elevation improves water delivery, enhances hydrotherapy performance, and adds an important layer of protection in cold-climate environments.

By placing the manifolds closer to the jets, ZERO-Gravity Plumbing™ shortens plumbing runs and reduces unnecessary turns and resistance. This allows water to move more efficiently through the system, resulting in:

• Stronger, more consistent jet pressure
   
• Balanced flow to every seating position
   
• Reduced pressure loss compared to floor-mounted plumbing
   

Each jet receives its own dedicated supply path, delivering smooth, uninterrupted hydrotherapy without relying on excessive pump force.

Plumbing layout becomes especially important during servicing or when a spa is intentionally drained. In many conventional spas, manifolds mounted at the bottom of the cabinet are often the last components to drain, allowing water to remain trapped.

With ZERO-Gravity Plumbing™:

• Manifolds are elevated so they drain first, not last
   
• Water naturally evacuates the plumbing system more completely
   
• Servicing and winterization are simpler and more reliable
   

This design is particularly beneficial in colder regions where proper drainage during maintenance is critical.

SubZero spas are designed for year-round use, even in extreme winter conditions. During normal operation, the spa’s insulation, circulation, and heating systems protect the plumbing automatically.

ZERO-Gravity Plumbing™ is an added engineering advantage—ensuring that when the spa is serviced or drained, the plumbing layout itself helps protect the system rather than working against it.

Elevated manifold plumbing requires more precision, planning, and material than floor-mounted designs. Many manufacturers choose cheaper layouts to reduce production costs.

SubZero chooses ZERO-Gravity Plumbing™ because it delivers:

• Superior hydrotherapy performance
   
• More efficient water flow
   
• Easier servicing and maintenance
   
• Added peace of mind in cold climates
   

It’s a behind-the-scenes engineering decision that makes a real difference over the life of the spa.