Re: post #20: Not exactly. The Fire Sprinklers are 1st in line, than house. In many areas Code asks for no shut off valve on the water supply leading to Fire Sprinkler manifold.

That is exactly how our house is set up,
The house feed off the line before the sprinkler system...
The shutoffs have tamper tags so if removed, the sprinkler company is not responsible (I will need to get the replaced after this)

That's why I was thinking I could put the PRV on the pipe to feed the house... that way it won't effect the sprinkler?

(Reposting pic, so others can see it without going back a page)

Correct, that would be the place to install PRV.

Your manifold set up could be installed incorrectly, though. Here, we always install Fire Sprinkler connection first. In case of fire, this line gets priority over the house...

OK, thanks. I figured as much

I have to say.. I love this site! Everyone is so helpful!

Thanks again to everyone

I will post back when I finally get the plumber to show up!! Grrrrr

StaticFX: it is very helpful to post photos. With visual, we don't have to guess and ask tons of questions. We can get right down to the point... Good Luck with your project !

OMG... what fiasco this it...

We finally got a plumber to our house. He checked the pressure. 85psi. Well good I guess.

But, this guy had no idea! He saw the sprinkler system and had no clue... didn't even believe it was a sprinkler! Then he tells us he wants to put the valve elsewhere... that it will dramatically reduce your pressure, and that we can choose... do we want the one outside hose pressure to go down.. or the sink.. or etc.? What!? Why would you put a PRV in a location that only reduces PART of the house?

I am calling another plumber... I made him leave. (of course after I had to shell out $80!. seriously $30 just to check the pressure... I could have bought a gauge for $10!)

Well, my guess is that the sprinkler system has air in it.. causing it to read high.

So, if the pressure is at 85, do we really need a prv now?

Thanks again.

The 85 PSI is only one data point in time. It could be all over the place during the day. Pressures may be lower in the morning and evening when people are wshing dishes and taking showers.

It's also about 2X above the minimum pressure.

It's actually wise to keep the pressure down and you heard the reasons.

Static,

I believe every one asked you to reduce the pressure, and asked you to get a gauge check the pressure and adjust it to normal residential water pressure.

The range of normal residential water pressure is from 30 to 80 psi. Ideally, the pressure should be set between 45 and 60 pounds in most residential plumbing systems.If the pressure rises too high particularly above 80 psi, plumbing fixtures and appliances (primarily hot water heaters) could be damaged or leak excessively.

If the problem is not fixed soon you will have all kind of problems, Thanks.

John

Yes, thank you.. I just wanted to make sure I HAD to spend the money. The rest of the repairs from the leak are going to cost over $1000 :(

I didn't think about the fluctuation possibility.
I have another plumber coming tonight to put a PRV in tonight.

Thanks again.