construction

[MeanDaGreen]

I have a twelve site using 13 gallon buckets, should I use the 2 or 3 inch pvc?

 

[aSilvrHaze]

I think most will suggest using the 3" pvc.

 

[hiboy]

bigger is better so ive heard
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[alvatron]

3" pipe would be idea, since you're using 12 sites, bigger pipes will allow more nutes to travel through the system faster. My 2 cents