My main water valve does not turn and off properly. No matter which way I turn the handle it will not tighten. Our water pressure is low because of this, where only one thing can be open at a time.
In NYC there is a shut off valve in the side walk with a metal cap. Home Depot sells a key to open and close it. I have almost no experience with plumbing. The most I have done is change shower cartridges and changed the stopper in the bathroom sink. Looking at the valve it looks like I would at most have to open the piping before and after the handle and replace that while installing a new valve, like this this or this one.
Album of valve and pipes
In NYC there is a shut off valve in the side walk with a metal cap. Home Depot sells a key to open and close it. I have almost no experience with plumbing. The most I have done is change shower cartridges and changed the stopper in the bathroom sink. Looking at the valve it looks like I would at most have to open the piping before and after the handle and replace that while installing a new valve, like this this or this one.
Album of valve and pipes