When buying a used hot tub or spa, make sure the tub is running and full of water. If the used spa was frozen this can lead to large repair bills. For $100 I can check out and test any spa.
Being in the industry for 27 years I have seen and serviced many makes of hot tubs and spas. I know the good and bad points on all the different makes and models of spas. Here are some tips on what to look for.
Installation of hot tubs or spas should be on a solid foundation and requires a 50 Amp GFCI breaker. DO NOT install hot tubs on any sort of patio blocks. Any shifting or sinking of block can result in stress cracks on your hot tub or spa. Even a concrete pad can crack causing a sinking of concrete slabs. I make and install 4”x4” pressure treated pads. These pads need no ground prep work. Just drop, level and lay the spa on top. These pads allow airing and breathing under the spa, thus not allowing moulding or rotting. These bases or pads do not bend and thus keep the spa on a flat, even surface.
Hot tub custom base or pads - installed: $450 supply only: $400
Self-leveling pads (telescopic) - Installed: $600