Max water pressure for plumbed in espresso machine

#1: Post by **javacrazed** » July 31st, 2010, 1:50 pm

I am in the process of plumbing my Rocket Cellini and was wondering if there is a max water pressure I should be aware of. I believe my house pressure is around 110ppsi. Can"t seem to locate any guidelines for installation. Any help would be appreciated.

http://users.rcn.com/erics/ · #2: Post by **erics** » July 31st, 2010, 2:22 pm

2.0 to 2.5 bar as measured by the pressure gage attached to your pressure regulator (which you most certainly need) while flowing some water through an empty portafilter.

July 31st, 2010, 2:31 pm

Eric, I am going to pick up a pressure gauge from HD in a few, are there gauges that have read outs by BAR you are telling me??

#4: Post by HB » July 31st, 2010, 2:37 pm

No worries, it's easy to convert 2 BAR to PSI.

July 31st, 2010, 2:47 pm

Dan, is there actually a pass thru pressure gauge that is sold? One that I just leave on the line? The ones that I have see in the pass are just to read and then remove?

#6: Post by HB » July 31st, 2010, 3:19 pm

Not sure what you mean; I put a tee on the line between the pressure regulator and espresso machine for the gauge.

http://users.rcn.com/erics/ · #7: Post by **erics** » July 31st, 2010, 3:29 pm

Most pressure regulators, like this one, - http://www.chriscoffee.com/products/hom ... latorvalve have a 1/4" NPT port to which you can attach a pressure gage. Some (most?) inexpensive gages have 1/8" male NPT ends. Be careful here to avoid an extra trip - you need to match up the sizes.

#8: Post by **keepitsimple** » July 31st, 2010, 6:06 pm

javacrazed wrote:I am in the process of plumbing my Rocket Cellini and was wondering if there is a max water pressure I should be aware of. I believe my house pressure is around 110ppsi. Can"t seem to locate any guidelines for installation. Any help would be appreciated.

Hi
I'd recommend you inquire of the manufacturer. (They have e-mail contact details on their website).

The reason I suggest this is that pressure ranges differ from one machine to another. For example, mine specifies a range of between 2 and 6 as being required. I run it at 4.

It's probable you're going to need a pressure regulator anyway (and a filter/softener might be on the list too depending on your water supply).

As has been noted earlier, the better pressure regulators (Watts etc.) have a port specifically for a gauge which makes life simpler and less plumbing to do. Gauges are pretty cheap.

#9: Post by **Fullsack** » July 31st, 2010, 6:26 pm

These gauges are directional. Having the dial face you right-side-up isn't important, having inflow to the "in" side and outflow coming out the "out" side is.

#10: Post by **cannonfodder** » July 31st, 2010, 11:23 pm

Most of the machines I have used have a max input of 4 bar. I measure that as static pressure, no flow. I run 3 bar static on my A3 which dips to around 2 bar with water flow.