You said, "He said that his house was too high and the water pressure was not enough for a big one." This is related to the water supply pressure in their community. As far as the water pressure is concerned, as long as you are not from the same community, there is no comparability. . .

as long as the panda brand gas hot water gas is used properly, the service life of 3 or 5 years can still be guaranteed

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Some brands in Xi 'an market are about 511 (you should know the brand, so forget it.