Come on term! Are you telling me that you truly belive that you never have problems in the first 10 years? Don't blow that smoke...I was a HotSpring dealer and replaced many of those over the years long before the 10 year mark.
Many of the top brands in the industry replace jets in the 3 to 6 year mark. We warrenty Marquis, Master, D1, Coleman, MAAX, Great Lakes, Freeflow and Nordic. The most common replacement on any of those are jets...
This week I've ordered jets for Artesian and Saratogo both that are less than 6 years old.
How long have you been selling HS?