My line pressure is about 80psi so, I'm looking for a Water Line Pressure Regulator Valve. Any suggestions?
Can I pick something up at Home Depot or do I have to get a specific one?

Maybe something like this?

http://www.orphanespresso.com/Line-Pres...2825.html#

See Why Reduce Inlet Water Pressure? for a good discussion. Nicholas and Eric recommend specific models here and here. Home Depot or your local plumbing supply will probably stock larger whole house pressure regulators. One of these would certainly do the job, but they're bigger/more expensive than the point-of-service pressure regulators.

espressojoe wrote:Maybe something like this? http://www.orphanespresso.com/Line-Pres...2825.html#

Yes, that would be a good choice. It is similar, if not identical, to the regulator shown here: http://www.chriscoffee.com/products/home/plumbing/andrejadirectconnect .

One important point is that you need a regulator that is sized to the flow it will see. If you look at the contents of the kit that Chris' Coffee sells, you'll see a solenoid valve that is normally closed but opens when the pump receives a start signal in the same manner as your boiler fill solenoid. The suction connection at the pump also needs to be "upgraded" to withstand the pressure you impose on it. When your pump took suction from the reservoir, the pressure at the pump's inlet was, maybe, 0.5 psi . In some previous post, I recommended that the inlet pressure be adjusted to around 5.0 psi during flushing conditions when fed water from a pressure regulator. But whether its 5 or 10 or 30 psi should not matter as long as the rest of the system is adjusted accordingly.

And then there's the water filtration and water treatment system you should have because in former days you had 100% control over exactly what went into the reservoir.