3 floor plus garage underneath, town home built in 2008. Radiant heat. In Seattle on city water.
About 3-4 weeks ago I started noticing that there was some air in the the water coming out of the faucets, showers and I even hear it in the toilet sometimes.
If the water has been shut off for 15 minutes or more, there will be air. It's not a lot of air really, I'm just worried about what could be causing it.
The home is on the top of a hill and to get water all the way up to the 3rd floor the builders had to install pumps in the garages where the water line comes into the house. I think it's a grundig or some such sounding brand. I don't see any leaks or hear any weird noises around the pump or water heater.
BTW the radiant heat is from Janes Infloor heating. Their system is self contained, ie if you run the hot water a lot, it wont affect the radiant heat and vs versa.
I do hear the hot water heater come on more, even when hot water hasn't been used for a while and I have the thermostat set so low for the radiant heat that it hasn't come on a month or so.
BTW the air can be heard when using both hot and cold water.