Pro-Pal Water Heater Service Valve kits simplify traditional tank-style water heater installations, combining everything needed for plumbing system connections in one box. Kits available with choice of connection solution to accommodate different installation requirements. Kits include integrated FIP dielectric unions with Press or SWT system piping connections. Kits including optional expansion tank service compatible with 3/4" MIP expansion tanks up to 5 gallons, include tank support hardware, and tank isolation valve with hi-flow hose drain.