I am not sure if that is a good assumption. A
swimming pool is a closed system designed to
operate at whatever pressure the pump
produces. A sprinkler system is designed to
operate at the pressure of the water supply. A
sprinkler system may have hundreds of feet of
tubing. I used a shop vac to drain lines on a
hot tub. I can't imagine doing my whole sprinkler system that way.
I am certainly no authority on this. I can just
tell you what I did. If I was going to do some
more research, though, I would try to find
something on how to winterize a sprinkler system,
rather than a swimming pool.
-Steve
At 09:47 AM 11/8/2019, Scott Hall via Shop-talk wrote:
>Jim,
>
>I'm going to assume this is a similar thing to
>winterizing a swimming pool. Â
>
>For pools, there are frequent warnings abounot
>using a compressor to blow the lines, or to make
>sure to keep the PSI below 20. Â
>
>It is frequently mentioned that a shop vac or
>dedicated blower tool is preferred. The
>thought is that to remove the air high pressure
>is not the goal (and that high pressure and
>damage the PVC pipe and related fittings) but
>rather high volume. And that a shop vac is the better way to achieve that.Â
>
>At least that's what the internet said.Â
>
>I used my compressor, set to 15 psi. I guess
>we'll know in the spring how I did--it just hit
>18 degrees here this morning. Â
>
>It sounds like your sprinkler system operates similarly. Â
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