Replacement for a 26 year old ThermoSpa Concorde Deluxe that finally gave it up. Could have bought from Amazon or others to possible save a buck or two, bur read their reviews,. You are on your own. From Spa Depot you order pre-configured replacement and there is help when ordering and after-sale as there will be questions. The BP7 connections to the water pipes were exactly the same width and height. The electrical requires a couple questions answered. One was my fault, as I expected the Blower was low voltage and it was not that simplified and concluded connections and the hot tub is now up & running with the TP700 Topside that did need some fiberglass cutting to fit. That requirement was clear beforehand. Thank you for the products and service.