I bought this looking for what can be adjusted to low pressure. When I tried to connect it, gas leaked. I inspected the mounting defects again, but I could not find the problem. I thought that it was initial failure, and when I tried to disassemble it was a structure that gas leaked in any way. Wondering, when asked the manufacturer, it was that it was structured to deliberately escape gas to stabilize the pressure. It is a pity that I did not purchase it if I knew from such a specification that it was such a specification.