Fixed water leak now low pressure
I fixed a leaking section of horizontal pipe that comes into the house. The water line comes up from the ground to this horizontal section, then it gos into the house.
After I put a new section in, the water pressure in the house will be good for about 20 seconds then go down to almost none. Every faucet in the house, toilet,washing machine etc.
The water company checked the pressure from the road and it was 80psi. There is no way that dirt or debris got into the water line during fixing it as the section I was working on is above ground and horizontal.
We can't figure it out.
There is another thing I will mention
The section of pipe that we took out had a Tee on it with a dead-end section about 6inches long capped off at one end. We thought that maybe someone was going to put in a water spigot at one time. We took this off and fixed the leak by putting an elbow in, instead of the Tee and capped-off line.
Could taking this off somehow affect the water pressure? I know that some people put in "water chambers" like this to stop water hammer, but could this have something to do with the pressure? It doesn't make any sense. Thanks for any help.