Main shutoff and outside faucet pressure fix

[wizard1]

Looking for some (additional) advice on "fixing" my main water connection below.
The white value leads to outdoor faucets and the red is the master shutoff. My main problem right now is the outdoor faucets are at street pressure which is ~120-140PSI. I've tried to setup a drip system but can't find an irrigation PRV that works with this type of high pressure and would like to plan the redo to support a future sprinkler system. Any advice would be very appreciated!

 

[Terry]

Either pull off for the outside faucets after the PRV you have, or maybe even better for your irrigation, install a PRV for the irrigation.
You should have a either vacuum breaker or a reduced pressure back flow preventer for irrigation.

 

[Sponsor]

 

[wizard1]

Thanks Terry! I reconfigured off of the PRV tonight. I'm thinking of also changing the main line interconnect but can't tell what type of fitting it has on it. In the photo above there is a brass fitting attached to the flexible 3/4" copper coming in from the street. It's labeled with "MB CO 3/4" and "A2549" . Any idea what this fitting is called? I think it's a reducing fitting from 3/4" to 1/2" male pipe thread. I'm concerned the pipe coming off of the main shutoff is galvanized instead of brass or copper, is there any reason to use this (ie: sacrificial anode)? It looks awfully corroded.

 

[Terry]

It's galvanized, and they rust pretty badly.
There was no reason to reduce down, and if you are redoing it, maintain the largest size you can.
1/2" only feeds two plumbing fixtures. With 3/4" you can feed a one bath home.

 

[Jadnashua]

Using galvanized piping in today's water supply is the lazy and cheap way...brass or bronze or copper is a lifetime fitting...galvanized can be quite short. THey cost more.

 

[wizard1]

This house is full of "lazy and cheap". I'm slowly trying to remedy that. Curiously the water heater is connected via copper and galvanized as well. If I was to redo with 3/4" as the main line I assume the recommendation is to transition to PEX? I'd prefer to not rip out and replace if it's not necessary, but the entire house is 1/2" copper except for what you see in the photo above.

 

[Terry]

How many bathrooms?
Adding an expansion tank after the PRV helps with pressure and flow issues too.
I prefer to size everthing after the PRV to this chart.

https://terrylove.com/watersize.htm

 

[wizard1]

Just the 1. It's an 18 fixture unit home according to your chart.