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 Post subject: Solar pool tubing
PostPosted: Apr 26th, '18, 10:47 
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Anyone know if solar pool tubing is fish safe? Thinking it may be a viable way to increase water temps over winter.

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 Post subject: Re: Solar pool tubing
PostPosted: Apr 26th, '18, 11:26 
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try it and let us know..... :D , actually good idea, and you'll need it up in the hills.

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 Post subject: Re: Solar pool tubing
PostPosted: Apr 26th, '18, 17:32 
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Ive used 19mm drip line with good results run a small separate pump on a timer .

Problem I can see with the pool tubing is way more resistance and power needed to push water through if you have it up on the roof you will need a powerful pump.

I use 300m of 19mm poly on my roof for heating our small swimming pool I use a MD55 pump for that.


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 Post subject: Re: Solar pool tubing
PostPosted: Apr 28th, '18, 19:10 
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Anyone know if solar pool tubing is fish safe? Thinking it may be a viable way to increase water temps over winter.

might depend on the brand/type.
If it is basically poly pipe then you will be fine.

Often black poly pipe 19mm-25mm is a cheap effective option anyway and much hardier to leave at ground level (as Terra notes/shows).

May have to watch temperature though since the temps can vary a lot with sunshine hours vs. cloud.
If you have a large water volume less of an issue.

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 Post subject: Re: Solar pool tubing
PostPosted: May 2nd, '18, 06:57 
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I havn't never heard or thought of that before. Think I should do a little bit of research on that!


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 Post subject: Re: Solar pool tubing
PostPosted: May 3rd, '18, 12:05 
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Once it's pumped to the highest point and starts running back to tank level it will have a bit of a syphoning effect, the total head resistance will be less than the highest point in the system. The pump chosen would still need to have the necccessary head to reach the highest point in the system but should run at a better efficiency once the water starts running downhill.

A bigger impact on heads will be the friction loss from such a long pipe run, some thought may need to be given to setting it up so that it branches into multiple shorter lengths of poly, then converges back into a single exit point.

In this system the biggest issue will be ensuring that water flows evenly through all the pieces. There's negatives to everything...

If I were to do this on a corrugated iron roof I would cut exactly matching lengths of poly and have them run up the tin roof in the valleys with the top of the lengths all matching (to try and keep the flow even)

If you're not worried and doing it on the cheap then 19mm black irrigation poly. If you're worried about the plastics and have a bit more cash then I'd use 50mm metric top and bottom with lengths of 20mm metric running between. Tapping saddles and end connectors would be cheaper than using T's. To secure it you could
take the screws out that hold the sheets to a purlins, put some galvanised strapping over the top, then running the screws back in. Double check the valleys aren't too deep or shallow, might need to step up to 25mm metric if the strapping wont hold it tight.

An option to prevent this radiating heat out of the system when the pipe isn't in the sun would be to position a solar panel on the roof to power the pump, the pump would then only run when the pipe was being heated. A thermo-electric switch (perhaps coupled with a solenoid) would be handy to prevent overheating the tank.


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 Post subject: Re: Solar pool tubing
PostPosted: Jun 22nd, '18, 13:59 
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So Bedlore, whats the latest news? how'd you get with designing/setting this up?

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 Post subject: Re: Solar pool tubing
PostPosted: Jun 23rd, '18, 07:57 
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When I ran my system through black poly during the day I found it would heat the water up ok during the day but early morning water temps were the same as not doing it. Soo many losses through radiating heat over night, even had the fish tank wrapped in layers of bubble wrap, the tank surface covered in floating polystyrene and I didn't pump to the beds at night.

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 Post subject: Re: Solar pool tubing
PostPosted: Jul 17th, '18, 16:02 
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further to this, Mel aka Redcap Builds a system has used micro tubing and has increase in water temp. Ive just purchased a load of 6 & 10 strand (similar to photos)
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Mel also has a covered poly house but has improved water temp.

Got some manifolds from Ebay and now to add another pump :support: to push water from sump up 2 - 2.5m run through these and back into sump.

Once Ive got this running there will be a number of these left over if your interested Bedlore, pm and see what we can work out.
Mel lives in Canberra your in Adelaide Hills temps should be similar :laughing3:

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 Post subject: Re: Solar pool tubing
PostPosted: Jul 18th, '18, 23:01 
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You're talking about pumping fish tank water, right? Everywhere I have tank water running I quickly get a buildup of scum on the inside of the supply lines, not to mention the small solids that get pumped. Seems to me, using such small tubing, while it probably heats up much quicker, it also will clog much quicker with buildup. And, with so many lines, it is going to be a big job trying to figure out which one(s) are clogged - once you notice the setup is clogging up. I think by using such small diameter tubing, you're creating a nightmare for yourself.


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 Post subject: Re: Solar pool tubing
PostPosted: Jul 19th, '18, 06:34 
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water from clean (I can see the bottom ) fish tank through gravel growbeds then into sump, theres no much or sediment in the sump now so SHOULD be OK....hoping anyway

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 Post subject: Re: Solar pool tubing
PostPosted: Jul 20th, '18, 08:01 
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To reduce the chances of clogging it might be better to run the collector pipes up the incline as opposed to across it. That way they can be flushed back down quicker and have very few if at all dips for muck to collect in. I'd even make an effort to incline the manifold pipes so they can drain out as well.

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