Here`s how to build your own solar powered hot tub heater or swimming pool heater for under £100 using basic materials that you may already own : http://www.amazon.co.uk/dp/B00X2OCUJ0

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Balboa M7 15" 4.0 kW Spa Heater Assembly W/O Tail Pieces [1.5in] (58148)

Balboa 15" 4.0 kW Spa Heater Assembly W/Pressure Switch [240V] [1 1/2"] (50142)

steel stock tank pool DIY. use pool filter system in summer and spa heater in winter to make into a hot tub!

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Balboa M7 15" 5.5 kW Spa Heater Assembly W/O Pressure Switch [240v] (50157PLG)

Balboa M7 15" 3.0 kW Spa Heater Assembly W/Sensors (LEM7 Systems TUV) (58061)

Balboa M7 15" 5.5 kW Spa Heater [2' x 2"] (58089) Replacement

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