I need to reduce the water pressure at my house, currently it is at 100 psi. Is there a built in pressure reducer in any of this that I can adjust? If not, can I put a pressure reducer valve somewhere in this set up or do I need to crawl under the house to do it?
That is your Gas meter. There will be some plumbers here shortly to help you out. Mine is one the front of my house near my hose spigot but this could be different for you.
Like the o.p. said that's your gas meter, under no circumstances should you be messing with it
What you need is PRV installed on you incomming water to get the pressure down to a reasonable psi, should be installed near your main shut-off for your house
I run into this a lot of times, the problem is that the o.p. doesn't prevue his post, it's easy to turn it around when you post it, but a lot of times after it's posted you can't do it