Hotels can use two stoves if they can't use high-pressure valves. If you want to use both stoves, either prepare two gas tanks to connect different valves, or you must change the valves when changing stoves. Remember not to use them. High-pressure valve and low-pressure valve are collectively referred to as pressure reducing valve. The difference is that the output pressure of the high-pressure valve is high, the flow rate is large (the output pressure is adjustable, and the ejector pin tightening pressure is high, otherwise it is low), and the output pressure of the low-pressure valve is low, and the flow rate is small. Low-pressure valves are generally used for household gas stoves or water heaters and high-power gas stoves in restaurants. High-pressure valves are used in water heaters. It is very likely that gas is released into the air because of high pressure and fast flow rate, and the water heater ignites the mixture again to explode, instead of gas.