Fexhull Hot Tub Heater for 1995+ Hot Spring/Watkins - Spa Heater 4kW Titanium w/Sensors- 73791?1kw/4 is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 99% below the $115.89 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.