I have an almost new 20 gallon boilermaker (no dents or scratches). I have added a SS whirlpool arm with 1/2" coupler and a welded 1.5" TC for heating element. The welding was done by a professional welder with lots of SS experiences so no sugaring or ugly clumping. Looking for $400 [FIRM] plus shipping (~$50) but can get exact quote when needed.