I have seen some discussion the use of a water pressure regulator and gauge. Is this necessary? What does it really do?

I just got my Vetrano last week and hooked it up saturday. I had to run to homedepot for a $3 piece and that was that. I have a 6 stage water filter for it. My apartment water pressure is 70psi, on the Vetrano it says its 4.75 Bar. I did a bit of tweeking and when its running its just under 9 bar. Everything seems to be working perfect, but I am not a pro.

mbuemi1577 wrote:I have seen some discussion the use of a water pressure regulator and gauge. Is this necessary ? What does it really do?

The regulator, well, regulates, and the gauge shows the results of the regulation. WARNING! RUMOUR CONTROL! I've heard that a rotary pump doesn't want to see much more than 3 - 3.5 Bar on the input site, and that the regulator is used to insure that. A regulator will also insure that the pressure that you see going into the pump stays the same, and doesn't depend on whether the car wash down the street is running or not to be right.

where exactly does the regulator install to? after the filters and before the machine? or before the filters?

i havent received the machine yet, but figuring i should i have ordered these when i saw them, do i need 1/4" or 3/8" sized regulator to go with the vetrano water softener and filtration kit?

thanks for all the great links and advice so far.

I think a rotary pump allows water to flow through so any line pressure or irregularity will affect output pump pressure. I've got a regulator hooked up just before the Vetrano and when I open up or close the regulator both the idle pressure and pump pressure go up and down respectively. I've read too where preinfusion of an e61 with a rotary pump operates best at about 28 or so psi. So, to ensure irregular line pressure doesn't affect pump pressure output and to maybe aid in preinfusion a pressure regulator is a good idea.