well with circulation in play, there would be advantages (after abdicating the sweetest advantage, simplicity) to dropping the snorkel into a companion tank of various descriptions, basically turning it into a water heater. to answer the question you asked ... yes, if depth and crowding can be solved the water volume buffers and moderates peak temps but won't change the max temp tolerance of the fiberglass or any insulation. mounting is typically by way of (4) stainless bolts thru a cylindrical wall of redwood staves (self sealing via swelling), or legs with feet resting on a flat tub floor. if the tub in question wouldn't easily accommodate either scheme, suspension from a davit might be an option. when cooled, cleanout is by scoop from above, so good ergonomics will be rewarded. remember also, a barrier preventing any contact with flesh must be accounted for space wise, and blocking the existing jets might be a downer
Thanks for the info guys. I am intrigued by the possibilities. I think the simplicity factor should be maintained. I could imagine a bunch of installation situations that could get tricky or expensive. KISS. I do think a separate tank for the snorkel and a pump would not be too hard to put together and still keep it simple. Somehow sitting next to a burning stove in a big tub of water makes me think of frog soup.
Wayno....I salvaged a worn out abandoned red wood tub from a condo project...took it home re-assembled it and got it to hold water with the redwood quickly swelling enough to hold water....I ran a skill saw around the circumference to lop off a foot from the height...didn't put much thought into the whole project and it turned out great....circulated the water by hand....nothing better than soaking in clean water and gazing at the stars...
Soaking is becoming my go-to remedy for my sore and tired joints. Too many projects exacts its toll. The bathtub inside is just ok.
So I just scored that old cookstove that I showed earlier in this thread. Maybe I can use some redneck tech and get that to heat my tub. My tub Is still in Cali, from a Daoist remodel. Free if I can get it up here. I have a bunch of copper pipe from another remodel. I will need a soak after I bash myself from building the thing.
My dad and I have been trying to rig modern hot tub plumbing through an old coal stove. So far, not so good. We coiled some copper tube in the stove to heat the water, but we've had a lot of leak issues between plastic plumbing and hot copper.
We have a couple of redwood tanks. They swell right up when you want to use them, or throw a little sawdust in to stop the last leaks.
I've been eyeballing the snorkel stoves for a while now.