Home water pipe pneumatic valve point of choose and buy

the pipe pneumatic valve has been widely used in railway stations, cold standing and interval of ventilation and air conditioning water system, cooling system, especially the household water pipe pneumatic valve, but also by market the user's attention and love. The user when choosing household pipe pneumatic valve, what points should be paid attention to?
the pipe pneumatic valve is very important in decorating material, be sure to check the quality. So you should choose copper or stainless steel pneumatic valve pneumatic valve is better, long service life.
second, when the choose and buy should choose the shops in the formal name brand products. Don't those subject to close shop to purchase, quality is not guaranteed. Inferior pipe pneumatic valve products have trachoma, easy to cause explosion hazard.