How do you blow out the lines?

[ChrisL]

I want to put my hot tub to sleep for a couple of months this summer. I looked around, but didn't find a good description of how to blow out the lines. I have two pumps, both accessible, with drain plugs. Do I blow them out from the pumps? Alternatively, can I just go up to 20-30 ppm on the chlorine and leave it as it certainly won't freeze.

Thanks
Chris

 

[mikeginder]

dont know much about spas but why cant you just drain it since it wont freeze? i would think you could use a shop vac, there are probably unions that can be taken apart near your pump too. oh and also a pump drain plug like on your pool pump

 

[chem geek]

I believe he's thinking of blowing out the lines after draining in order to avoid biofilm formation in the piping so that he can avoid dealing with that when he refills again.

 

[ChrisL]

Exactly. Last time I drained the spa for a couple of months in the summer, I had significant biofilm and it took a while to clear it all out. Since I have never done theis before and it is not a piece of cake o get to the pumps, i was wondering if there is anything that might help me, instead of me just winging it.