Solar heating hack for an Intex SPA hot tub.

[rin67630]

Here is an easy heck to add solar heating to an Intex SPA.
It does not need any pump, but just derives a part of the filter water stream into a loop of electrical corrugated conduit that runs through a greenhouse box.
(n.b. the photographs are old ones of the first version using an irrigation hose)
Solar heating hack
Enjoy!

 

[befeleme]

Here is an easy heck to add solar heating to an Intex SPA.
It does not need any pump, but just derives a part of the filter water stream into a loop of electrical corrugated conduit that runs through a greenhouse box.
(n.b. the photographs are old ones of the first version using an irrigation hose)
Solar heating hack
Enjoy!

I would like to connect my Intex SPA to solar heating and while searching the solution, I found your post. However, the link is not valid anymore. Could you, please, share it again? I have a solar heating mat for pools with standard pool hoses, but I have not made up how to connect it to Intex spa (without leakage ).

 

[rin67630]

I would like to connect my Intex SPA to solar heating and while searching the solution, I found your post. However, the link is not valid anymore. Could you, please, share it again? I have a solar heating mat for pools with standard pool hoses, but I have not made up how to connect it to Intex spa (without leakage ).

Oh I just have seen that my underwater vacuum cleaner description needs a revision.
I now filter before the pump and am using a metallic scourer as a filter. It is astonishly efficient and cleans very well. after the cleaning, just rince the scourer under your water tap.

 

[brainwashed]

I used something similar for small plastic pool, slightly bigger than your SPA. The water got nice and toasty but I could never get rid of the algae. All the flow went through an oversized sand filter and tried every chemical/pH thing I could get my hands on. Even after a complete water change and clean, it did the same once the water reached a constant 30C.

 

[rin67630]

My current pool-heater:
the connection is a DN40 elbow with a rubber seal from water closets supplies .
Just screw the rubber seal on the water outlet from the circulation pump.
(it has no thread, but will just grip enough).

Works quite well +6°C in three hours.

 

[rin67630]

I used something similar for small plastic pool, slightly bigger than your SPA. The water got nice and toasty but I could never get rid of the algae. All the flow went through an oversized sand filter and tried every chemical/pH thing I could get my hands on. Even after a complete water change and clean, it did the same once the water reached a constant 30C.

It all depends on your original water supply. If it comes untreated from your own well, you have bad cards in the hand.

 

[brainwashed]

I only used treated city water. I made the mistake once of just topping up with deep-well water and never again.

 

[rin67630]

I rewrote the doc according to the now easier way to do it:
Intex SPA hack (solar heating and cleaning)

 

[rin67630]

I only used treated city water. I made the mistake once of just topping up with deep-well water and never again.

Yo may also read my cleaning tricks. It is important to keep the walls and the bottom free from the slippery layer of bacteria/algae that builds up over time. 10 cl of bleach every 2nd day and a tab of bromine are enough to keep it free of algae

 

[brainwashed]

Thank you. I used a correct dosage of chlorine but never considered bromine. Basically anyone around here using well water has an uphill battle. City water goes a long way but high temps plus some rainwater will upset the balance.