Panel utilizes an integrated system of four 22-nozzle, fully adjustable spray heads for stimulating hydrotherapy Master clean spray face is easy to clean 0.6 gpm (gallon per minute) maximum flow rate from each spray head for a maximum combined flow of 2.4 gpm (gallon per minute) 1/2 in. Npt connections Soldering template included for ease of installation.Pressure:80 psi (5.5 bar)