Can water actually be blown out using a vacuum? Check valves damage?

swimmynoodle

Well-known member
Aug 1, 2024
46
Pennsylvania
I've done a lot of research but came up with conflicting information.
My swim spa was cleaned, AhhSome run through all the lines 32 times until no more gunk came out ( :oops: ), and I can confirm there is no more grunge in the lines.

It is ready to be drained and refilled with the final water to be used for swimming, but....

I want to be sure all the water from the system is drained from the internal lines which lead to the several dozen jets. I know it's not necessary but I'm a new pool owner and.. enough said :ROFLMAO:.

Many people say you can blow the lines out, but others say there are check valves which would be damaged. Some say you can vacuum it out, but others say no matter what you do, there will always be gallons of water trapped in the lines.

If I wanted to ensure all water was removed from the jet lines, can you stick a vacuum in reverse in each jet to blow all the lines? Can you use a leaf blower or will that be way too powerful? Does blowing the lines become more effective by closing all of them and then opening one at a time (to concentrate the force)?

My main concern is the antifreeze from the previous winterization. I called the company who did it and they said they used non-toxic pool safe antifreeze. But, being a perfectionist and semi-worrier, I want to ensure all antifreeze is out before the final fill-up. Also, I ask more out of curiosity as to whether or not it is really possible to drain all the water from the lines or if the 'blow the water out' theory wont work because of these supposed illusive check valves.

Thank you!
Barefoot Spa SS13 Swim Spa 13'
 
Also, I ask more out of curiosity as to whether or not it is really possible to drain all the water from the lines or if the 'blow the water out' theory wont work because of these supposed illusive check valves.
You never get 100%, you can leave the blower running extendidly and it will spit drips for as long as you do.

But 99.9% is plenty good enough.


I wouldn't worry about any check valves, they are nothing but a flap on a spring. Blower PSI is lower than what is possible with a SS pump or VS pump on high speed. Blowers specialize in volume, not psi. An air compressor on the other hand, may cause damage if it exceeds the psi capability of the plumbing.

I've used both the exhaust port on my shop vac, and my backpack leaf blower, duct taped to the lines to blow them.
 
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