Where can i find an 8" port

[wccoug21 10+ year member]

As the title says. Needs to be 16" long or longer

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[tcguy85 10+ year member]

http://www.sonotube.com/products/sonovoid_sizechart.html

you would probably want the 8.5" once to get the 8" ID.

 

[Louisiana_CRX 5,000+ posts]

PVC sewer pipe will work

 

[tcguy85 10+ year member]

PVC sewer pipe will work

yep that too. wasn't sure if they made them that size, but i'd imagine they would.