Decided to go back to the pipe kit and refine it. Started from scratch and I now have this. Comes complete with Straight/T/X and Corner sections. Might add another Straight section with a turnwheel attached..

Low Poly - Around 800 verts for all pieces combined.

What i've done here is just add them all together in Blender to show what it can do. I am confident that it can be snapped together to create complex piping and still "loop" back to the first piece

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Textures are packed into the blend file.