Hi, Looking for some help with my iron air filter. New house on well water. We have a Water-right impressions air filter with a water softener after. Off our pressure tank, the supply line is tee'd to go to outside faucets and to the air filter. After a regeneration cycle, we get air pockets when using the outside faucets for the first 3-5 min of using a garden hose or sprinkler. Any time after that is normal till the next regeneration. We have never experienced this with any faucets, toilets, or showers past the air filter/softener. Our plumber says this can happen. I questioned if the check valve in the supply outlet to the air filter is faulty. Any thoughts or suggestions? Thanks Eric