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jameg
Main water shutoff
jameg

Hi:

I recently watched the Ask TOH show about installing a new master shutoff and I wanted to relate the story about his problem with his. He was having a kitchen faucet replaced when the plumber told him that the fixture shutoff was not holding and he would have to shut off the water for the entire house. After the faucet was replaced and he tried to reopen the master shutoff it would not reopen. The plumber called the city, when they came out to shut the water off at the street valve they found that it would not turn! The solution they came up with was to have the master pipe frozen so the plumber could install 2 new master shutoff valves, one before and one after the water meter. Within 3 days the city water department came out and shut off the water for the neighborhood and replaced the street valve. :D

A. Spruce
Re: Main water shutoff
A. Spruce

Word to the wise, the house main is up to the owner to maintain, the street, or city main is up to the city to maintain.

Fencepost
Re: Main water shutoff
Fencepost

Another way is to use a full-port ball valve and a compression or Shark-Bite type fitting. Assemble the valve to the fitting first. Then cut the pipe open, let the water fly. Open the valve and put it onto the pipe (and tighten down the compression nut if necessary). Because you are using a full-port ball valve, the resistance to getting the assembly onto the pipe is low. Then close the valve once the fitting is all the way on the pipe (and tightened down).

I've used this method with black poly pipe and a barb fitting with hose clamps.

Yes, you'll probably get wet. If you're indoors, it's probably not a good plan. You will waste a lot of water. You probably wouldn't want to use this method if you'd have to cut threads on a galvanized pipe with the water spraying everywhere. But it's a quick way to replace a main valve when there's no other way to shut off the water.

bill
Re: Main water shutoff
bill

.I would recommend that you do not do what Fencepost says. I saw a contractor break a water main and he tried to do this for half an hour before he called me. we had to reduce the pressure in the street to half so that he could slip the ball valve over the pipe. All the people on the street complained about low water pressure. The correct way is to call the town or city and have them turn off the water and then replace the valve.

I should add that the water pressure in the street is in excess of 180 lbs.

dj1
Re: Main water shutoff
dj1

In my city, there is a guy from the water company, whose only job is to replace worn out, hard to turn and leaking main shut off valves, before the meter (LADWP's property).

He works alone and replaced the shutoff valves without turning the main in the street that cuts the water to the entire block.

So how does he do it alone and with water running? Very fast. He also makes sure no dirt comes into the meter.

If the city's shut off valve allows water to pass by, the homeowner or the plumber, can't replace the main shut off to the house.

Call the dept of water.

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