Compact Hot Tub Fits Any Door

Smart Design for Real Spaces

The Knight solves the problem that stops most hot tub purchases: where does it actually go? At 71.5 inches wide, it fits through standard doorways and navigates hallways that larger tubs can’t. Perfect for indoor installations, older homes with narrow access, condos, or small decks where every inch matters. The elongated shape delivers full-body relaxation without demanding the footprint of square or round designs.

Inside, the full-length lounger cradles you from head to toe while up to 18 jets target shoulders, back, and legs. The compact 250-gallon capacity heats quickly and costs less to run than larger models—making daily use practical, not indulgent. Three additional seats mean family and friends fit comfortably without crowding. The narrow profile that makes installation easy also creates an intimate soaking experience.

Three Ways to Own a Knight

Choose the configuration that fits your needs. Industry Standard delivers Royal Spa quality at entry price—same warranty, same Indianapolis manufacturing, same support. Hybrid adds a three-pump efficiency system that saves over $1,000 yearly for quieter operation and decades of reliable performance. Medical build is not available for Knight.

Engineering That Proves Itself

The Knight’s Bio-Lok® Microbe Shield protects the shell at the molecular level, while ozone purification keeps water fresh between uses. Epsom salt compatibility—exclusive to Royal Spa—proves the quality of materials and engineering other manufacturers can’t match. Standard serviceable components mean any qualified technician can perform repairs without waiting weeks for proprietary parts from distant warehouses.

Royal Spa’s 40-year structural warranty backs the Knight with engineering confidence competitors offering 5-10 year coverage can’t provide. Made in Indianapolis since 1981, every Knight is custom-built one at a time with your choice of shell colors, cabinet finishes, and upgrades like waterfalls, LED lighting, or stereo systems. Standard coverage includes 10 years on surface, 3 years on parts, and 40 years on structure.

Royal Spa products promote relaxation and general wellness. Not intended to diagnose, treat, cure, or prevent any disease.

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Knight FAQs

How big is the Knight?

The Knight seats 4, holds about 250 gallons of water and can be configured with up to 18 jets. See how it compares with other models in our hot tub model comparison.

What builds are available for the Knight, and what does it cost?

The Knight is offered in the Industry Standard and Hybrid builds. Listed pricing is $8,495 to $11,695 depending on build. Pumps range from 1 to 3 depending on build. For a full breakdown, read how much a hot tub costs.

Can I use Epsom salt in the Knight?

Yes. Royal Spa hot tubs are built to be Epsom salt compatible. Learn more about Epsom salt in a Royal Spa hot tub.

What warranty comes with the Knight?

40 years on the structure, 10 years on the surface and 3 years on parts.

Where is the Knight made?

It is built by Royal Spa in Indianapolis, Indiana, where the company has manufactured hot tubs since 1981.

How soon can I get a Knight delivered?

Delivery timing depends on the build you choose and the current schedule, so ask your showroom: Factory Showroom (Indianapolis), Avon or Pendleton Pike.