By seamless, I really mean this type of stuff: http://www.jmeagle.com/products/water_sewer/pure-core.html
It comes in spools, 1000' long if I remember correctly. When they get to the end of a spool and need to connect to the next, they melt the ends and push them together (their term for that is "fusion weld" but I think any welders on the OB would disagree with that term) so that you can't even see the joint afterword. The joints are very difficult for the untrained so I'd hire that part out if you decide to go that way.
It comes in spools, 1000' long if I remember correctly. When they get to the end of a spool and need to connect to the next, they melt the ends and push them together (their term for that is "fusion weld" but I think any welders on the OB would disagree with that term) so that you can't even see the joint afterword. The joints are very difficult for the untrained so I'd hire that part out if you decide to go that way.