oldbeezer Joined Nov 2, 2017 Messages 599 Apr 19, 2018 #1 I have noticed on fiberglass Interstate tanks there is a ridge running down the middle of the back. Other than looking odd does it serve a purpose?
I have noticed on fiberglass Interstate tanks there is a ridge running down the middle of the back. Other than looking odd does it serve a purpose?
Bob Z. Joined Mar 30, 2012 Messages 624 Apr 19, 2018 #2 Most probably the molding joint for the two left and right side halves.
oldbeezer Joined Nov 2, 2017 Messages 599 Apr 19, 2018 #3 That's what I was thinking. Just curious if it had anything to contribute to the strength of tank.
