Our home has a private well and pressure tank system. The pump is 3HP. We have a 40/60 pressure switch. We recently installed a 119 gallon pressure tank. We have lived here for 16 years. When we originally moved in we had really good water pressure ( enough to run approx. eight 3/4 inch rainbird sprinklers at once and still have decent water pressure in the house. We had to replace the pump about 10 years ago and they replaced the pressure tank at that time with an 86 gallon pressure tank. Since that time our water pressure has been poor. We recently upgraded to a 119 gallon pressure tank.This did not improve our overall water pressure when attempting to water the lawn. At the current time we are only able to run 4 rainbirds and our water pressure drops to 20 PSI. On the system when we first moved in there was an secondary air inlet valve in the main water line between the pressure switch and the pressure tank. When it was replaced 10 years ago this was taken out by the installer. Could this additional air inlet valve in the water line actually increase and hold our water pressure at the levels that we first experienced when we moved into the home? I am considering installing a new air inlet valve similar to how it was set up when we moved in, but am not sure that this will actually increase / improve our water pressure or how it would hold the water pressure at a constant level when attempting to water the lawn and pasture. Any guidance would be greatly appreciated.
Check to make sure you don't have a malfunctioning vacuum breaker somewhere. Vacuum breakers are recommended to prevent dirty water or foreign matter that is present around your sprinkler heads, from entering the potable (fresh) water supply. If negative pressure should occur, then a mechanical float would drop inside the vacuum breaker and open the atmospheric vent.This allows air into the pipes upstream of the sprinkler heads, thus preventing "siphonage" back into the supply pipes. The vacuum breakers should be installed at least 6" above the level of the highest sprinkler head.
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