We're slowly renovating our 90~100 year old house and when we get to the bathroom we intend to install a spa bath. Not a large spa/jacuzzi, just a bath. Most of those we've seen so far come with a pump that quite frankly leaves a lot to be desired. We want something that will massage our muscles, not something similar to a can of beans. At the same time we don't want to be blowing off the jets or pipework or having to choke the pump because it's too powerful.
Is there some information or a web site that can assist us in determining a suitable pump size for a given application?