Vaults are for keeping treasures safe. And Bullfrog Spas’ “Spa Vault” was created precisely for that reason. It is a kit made of galvanized steel that surrounds your hot tub so it will not corrode, but remain safe and secure when installed in-ground.

“A portable hot tub is completely self-contained, which is partly why they are economical,” says Bill Renter, owner of Long Island Hot Tub. “But to install one in the ground, partially or completely, or to surround it in some other material, you want to be sure the plumbing etc. doesn’t corrode or get damaged, and can also be easily accessed.”

So why bother? Why not just get an in-ground spa? In addition to portable spas being more budget friendly, when it comes to Bullfrog Spas, for example, there’s their interchangeable massage jets and easy ongoing maintenance, as well as energy efficiencies to attract you. It’s just that some Bullfrog owners also want their portable spa to look like a custom built-in.