(209) 543-9300 info@unitedspasmfg.com

About Us

Read about United Spa Mfg and out process for creating your custom hot tub spa.


Your Spa Options

Our Story

Welcome to United Spas Manufacturing! When you purchase a hot tub, it can be one of the most rewarding lifestyle decisions you make. You’ll find a hot tub provides the ideal venue to connect with others and enjoy warm-water therapy. A hot tub provides a multitude of health benefits ranging from stress reduction to muscle recovery. Hot tubs are easy to own and operate and are available in a variety of shapes and sizes.

United Spas Manufacturing offers a variety of options including lighting and aromatherapy. You’re just a click away from enjoying a healthy, happy lifestyle. We are a premier spa and hot tub manufacturing facility. With the corporate offices located in central California, spas are built to order and shipped worldwide. Spas can be delivered with all the accessories: gazebos, skirts, steps, and lighting. Your new spa can be shipped to you and setup by a local dealer in your area.

The United Spa Difference

United Spas has been a leader in quality and excellence in the luxury hot tub industry for over 35 years.  How have we done this? Simply put, quality products.

Every spa we produce goes through the same process, ensuring same level quality in every line of spa we build.


Girl luxuriating in hot tub spa outdoors

Our Process

Step One - The Spa Design

Step One - The Design

The design. We vacuum form the shell to our custom molds.

[expand title=”Read More…”]After the vacuum forming process is completed, the shell is then backed with multiple layers of sprayed fiberglass. Once spraying is complete, then the fiberglass is professionally rolled to insure consistent thickness throughout the spa shell. United Spas Mfg is proud to have one of the most durable and thickest shells in the industry.[/expand]

Step two- frame building for spa

Step Two - Frame Building

Frame building. Structural integrity is key in a quality product.

[expand title=”Read More…”]Our carpentry department builds the frame of the spa out of a mix of 2×4 supports and pressure treated 2×4’s for reduced weathering. United Spas Mfg is proud to have one of the most durable and heavy duty frames for their spa shells.[/expand]

Step Three - Electrical wiring and testing for spa

Step Three - Electrical Wiring

Electrical wiring and testing. This is where we prepare our state of the art digital controllers to be installed into our spas.

[expand title=”Read More…”]Our top of the line controller consists of the best heater currently on the market for spas (5.5 KW heater). Also, our Waterways motors are prepped for installation and tested twice before they get installed into our spas.[/expand]

Step Four - Porting and Plumbing

Step Four - Plumbing

Porting and Plumbing. This consists of placing the spa upside down for proper drilling and jetting.

[expand title=”Read More…”]Then we  test the plumbing and jets under high pressures for an extended period of time. We take pride in making sure every jet is sealed and secure for many years of relaxation.[/expand]

Step Five of spa manufacturing - insulation and filling

Step Five - Insulation

Insulation and filling. Our foam technicians spray open cell foam into the underneath of the tub.

[expand title=”Read More…”]Our technicians make sure each spa is well insulated to keep your energy cost as low as possible. United Spas MFG takes pride in knowing we have one of the most efficient spas on the market.[/expand]

Step Six - Full System Test of Hot Tub Spa with Water

Step Six - Full System Test

The full run through.  We test the entire system of the spa with water.

[expand title=”Read More…”]Here we take the entirety of the spa components from heating, electrical and plumbing, and running full water testing for a minimum of 24 hours in hot and cold water to insure everything is performing as designed.[/expand]

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