eddielasvegas Report post Posted 10 hours ago Hello All, I'm replacing the angle valve on the water supply for our fridge and when I remove the valve and brass connector in the attached picture, the water flows freely for a good while, creating a wet mess. No idea how much water, but easily a gallon or more as it soaks multiple towels and rags. Before opening up the water supply line, I open three faucets in the house and turn off the water to the house. I have a Grundfos circulator pump too (to get hot water quickly to all locations) that I stop when I open the faucets. Any CWT plumbers that can tell me how to stop the water from flowing so I can install the new AV? Did I need to stop the Grundfos long before I actually shut off the water as the house might be harboring residual pressure from the Grundfos? The AV is about 3-4 inches above the floor. Thanks for your help. Eddie Share this post Link to post Share on other sites
forepaw Report post Posted 9 hours ago It might not be enough to stop the Grundfos pump. It needs to be valved off upstream. Also, do you have roof-mounted solar? An expansion tank on another hot water heater? Your street valve (meter box) might also be defective. If you have an outside irrigation system, with an open valve, it could backfeed into your home plumbing as the daytime temperature increases, thus increasing pressure in the irrigation tubing or hose. 2 Share this post Link to post Share on other sites
PRDATR Report post Posted 7 hours ago If you have an outside irrigation system, with an open valve, it could backfeed into your home plumbing as the daytime temperature increases, thus increasing pressure in the irrigation tubing or hose. If so he should check the backflow/check valve. 1 Share this post Link to post Share on other sites
eddielasvegas Report post Posted 6 hours ago 4 hours ago, forepaw said: It might not be enough to stop the Grundfos pump. It needs to be valved off upstream. Also, do you have roof-mounted solar? An expansion tank on another hot water heater? Your street valve (meter box) might also be defective. If you have an outside irrigation system, with an open valve, it could backfeed into your home plumbing as the daytime temperature increases, thus increasing pressure in the irrigation tubing or hose. No solar or HW heater expansion tank. I'm shutting the water off after the city meter but before it enters the house. I'm sure the house shut off valve is not leaking as it was replaced about 10 years ago with a ball valve. I'll shutoff the water using the city valve next time and the house shutoff next time. We only have one valve for our irrigation system so I'll run the irrigation system for a couple mins after I shut the water off. Thanks @forepaw Eddie Share this post Link to post Share on other sites
