... Color: White,grey,blue,red,black Color Thread or socket UPVC ball valves Steady and reliable quality, 100% gas sealing test ... resistance is over 5MPa).3) Hot welding connection adopted, making pipes and fittings into whole, leakage effectively prevented.4) Excellent heat ... ) Low noise, reduced by 40% compared to galvanized steel pipes.8) Soft colors and excellent design, suitable for installation either ...