pool solar heater - 32mm to 13mm

[shaft1]

hi,
I'm trying to make a solar pool heater for the kids pool.

The pool has 32mm inlet and outlet which is connected to the pump via a flexi pipe.
I've bought 30m of 13mm (internal diameter) black water irrigation pipe which i want to add in between the pump outlet and the pool inlet. The idea of the solar heater is that water comes out of pool, goes through the pump, then through the black irrigation pipe where it warms up and finally back into the pool.

Now i just need to find suitable fittings/reducers to connect 32mm pipe to 13mm pipe and then back.
Can someone point me to suitable connectors? or if there is a better way of doing this then let me know.
thanks

 

[lostinthelight]

Did you read: https://www.diynot.com/diy/threads/solar-water-heating.546030/

 

[muggles]

Pipe is measured on external diameter, not internal, but either way your idea won't work I'm afraid. It's been tried before, and the water in the pipe doesn't stay hot for long enough

 

[lostinthelight]

It's been tried before, and the water in the pipe doesn't stay hot for long enough

Only thing that would get hot would be the pump struggling to force water through a 15mm pipe

 

[muggles]

Only thing that would get hot would be the pump struggling to force water through a 15mm pipe

 

[shaft1]

Pipe is measured on external diameter, not internal, but either way your idea won't work I'm afraid. It's been tried before, and the water in the pipe doesn't stay hot for long enough

to late now, pipe has been bought. in for a penny....

external diameter is 16mm. any thoughts on possible fitting to connect it to 32mm pump pipe?

 

[muggles]

https://www.colglo.co.uk/product.php?product=POLYG1120

https://www.colglo.co.uk/product.php?product=POLYG3450

Personally I wouldn't waste any more money than you already have, but if you really must then those should sort you out.