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Old 05-09-2012, 03:17 AM
Hawkshot99 Hawkshot99 is online now
LawnSite Senior Member
 
Join Date: Aug 2005
Location: New York
Posts: 682
I would guess strength has alot to do with it. Look at any tank that is meant to hold large amounts of pressure. They are all round. This creates a equal pressure on all 360 degrees of the shape, rather than at a weaker point such as a corner with a weld.

Plus the % of market that is taken up by lawn mowers is so tiny that it would cost a lot. The tanks are more sophisticated than a plastic injection like on a gas mower.
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