（1） Pressure guide tube thickness should be appropriate, the general inner diameter is 6 10mm, the length should be as short as possible, the maximum length should not be more than 50M, in order to reduce the delay of pressure indication. Os yw dros 50m, dylid dewis y mesurydd pwysau sy'n gallu trosglwyddo pellter hir.
（2） When the pressure guide pipe is installed horizontally, it should be guaranteed to have a tilt of 1:10 1:20 to facilitate the discharge of the liquid (or gas) accumulated in it.
（3）Pan fo'r cyfrwng mesuredig yn hawdd ei gyddwyso neu ei rewi, mae angen ychwanegu piblinell olrhain cadw gwres.
（4）There should be a cut-off valve between the pressure outlet and the pressure gauge to prepare for the use of maintenance pressure timing. Dylid gosod y falf torri ger yr allfa bwysedd.
