Make your own swimspa?


J

Jim Elbrecht

I keep seeing free hot tubs on craigslist and wonder if I can put a
couple to work.

I'm considering building an in ground, concrete swimspa next spring.
Can the pumps, bubblers & fittings be adapted for use in a concrete
enclosure? Will a pump- or 2- provide enough water flow to swim
against?

Has anyone here ever built a concrete tub? I'm considering an 8x15
footer- maybe 5' deep? 4?

I'm still in the head-scratching and envisioning stage. Welcome all
comments, criticism, or advice.

Thanks,
Jim
 
T

trader4

I keep seeing free hot tubs on craigslist and wonder if I can put a
couple to work.

I'm considering building an in ground, concrete swimspa next spring.
Can the pumps, bubblers & fittings be adapted for use in a concrete
enclosure?  
In the grand scheme of things, I don't know see that you're saving
much to justify trying to salvage parts from free spas or how they can
be adapted to a concrete spa. For example, in my spa, the air
bubbler is nothing more than an air blower that forces air through
hose and a passageway and out holes in the fiberglass spa bottom.
How you would adapt or make that out of concrete, I have no idea. I
guess the water jet portion could be fitted into openings in the
poured concrete, but then you have the little details like the air for
the jets is controlled by a valve device that controls the amount of
air that can enter. That is built into the top of the spa where you
can reach and turn it. How and where do you mount that in the new
arrangement? Another issue would be the heater. The spas you're
talking about have heaters that put out about 6KW. I would expect
that concrete spas, because of size and thermal issues would require
larger gas heaters. It would seem to me that to get anywhere near
decent results you need a whole lot of experience and the right
parts. Why not just get a regular spa?


 Will a pump- or 2- provide enough water flow to swim
Oh, maybe this is why.

Sure, it will, if it's big enough. But the pumps in the typical spa
do not move any where near that much water. They blast water out of
jets and use 2" piping, which gives you a soothing jet of water, not a
river current. To move enough water so that you can swim in place
requires far more water than any of these pumps can supply. Though
not popular, some people do have these types of pool.
 
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R

Reno

I keep seeing free hot tubs on craigslist and wonder if I can put a
couple to work.

I'm considering building an in ground, concrete swimspa next spring.
Can the pumps, bubblers & fittings be adapted for use in a concrete
enclosure? Will a pump- or 2- provide enough water flow to swim
against?

Has anyone here ever built a concrete tub? I'm considering an 8x15
footer- maybe 5' deep? 4?

I'm still in the head-scratching and envisioning stage. Welcome all
comments, criticism, or advice.

Thanks,
Jim
Funny you should ask - I have just such a pool almost completed in the
basement of my new house. The size is 8' x 14' by 5' and the water will
be 4.5' deep. The concrete work was done just after the basement walls
were poured. The jets, intakes, light housing and skimmer were cast into
the concrete. The pool itself is painted and the I am in the process of
designing the pump and other mechanical system.

My preliminary design was for a 400 gpm pump for maximum current speed
but the pump will be variable speed so I can have a nice slow speed for
aquacize. The jets came with 1.0" diameter orifices and I also bought a
set of 0.925" orifces so I can experiment.

Since the pool is in the house I do not want any chlorine smell at all
and have investigated the options for disinfection.

It has been a lot of work researching and designing the varius systems. I
will be getting help from some industrial engineers to design the control
system.

I would be happy to discuss my work with you but I don't want to use my
email address on the public group. I'll try your address to see if it
connects.
 
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N

nigel

I keep seeing free hot tubs on craigslist and wonder if I can put a
couple to work.

I'm considering building an in ground, concrete swimspa next spring.
Can the pumps, bubblers & fittings be adapted for use in a concrete
enclosure? Will a pump- or 2- provide enough water flow to swim
against?

Has anyone here ever built a concrete tub? I'm considering an 8x15
footer- maybe 5' deep? 4?

I'm still in the head-scratching and envisioning stage. Welcome all
comments, criticism, or advice.

Thanks,
Jim
Just wondering how your swimspa plans are coming? I would like to form a similar sized concrete swimspa in the spring. I have 3 pumps / hot tub valvesand some larger to start with. It seems you guys had it pretty well figured so any advice would be appreciated, regards Nigel.
 

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