FYI
This report is from Jerry at the IP factory along with Henry, the IP 350 owner. Henry had this tank make by Duraweld and it will fit back into the existing holding tank space. Please see this drawing which is a drawing supplied by Duraweld. Heny was very happy with the tank.
copy of email, sent into the factory
Subject: Re: IP350 Holding Tank
Hi Jerry
Just wanted to let you know that the Duraweld drawing for the IP 350 holding tank does fit through the hole in the floor and works very well as a replacement for the original tank. If any IP 350 owners contact you in the future looking to find a replacement holding tank l was very satisfied with Duraweld
Take care
Henry
end copy