Need plumbing setup identification

Jan 15, 2024
17
australia
So I have a cartridge filter setup and currently have some heavy duty algae sludge issues and had been looking at using my old solar pump to make a portable vacuum to waste option... when I noticed this extra pipe with an on off valve that goes out to the drain, got me thinking if the previous owner actually had already had a 3 way installed to vacuum to waste and just never mentioned it. Is that what this is? If so would you just plug the pump power cord into the wall directly to bypass the filter and chlorinator?
 

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got me thinking if the previous owner actually had already had a 3 way installed to vacuum to waste and just never mentioned it. Is that what this is?
Yup.

If so would you just plug the pump power cord into the wall directly to bypass the filter and chlorinator?
I don't understand this question...how does where you plug the electrical for the pump change where the water goes?????
 
Yup.


I don't understand this question...how does where you plug the electrical for the pump change where the water goes?????
I dont know, hence why im asking, It's currently plugged into the chloromatic salt cell machine, by opening that valve and turning on the pump, to vacuum to waste, will all of the waste automatically go down that pipe... what's to stop some of it from going into the filter , and chlorinator etc , or does opening the valve cause a suction of its own and stop that? Is there anything else I need to know about how this works and exactly what to do.