What is causing air in house water lines?

[steve tym]

You might actually have been generating hydrogen from the anode. When was the last time that you pulled your anode to check if it was clean and still had material on it?

Personally, I only use powered anodes as pulling anodes is just an awkward job for a part that needs to be checked, if not replaced annually. Your water heater will last a lot longer if the anode is in good shape as it mostly or completely stops the corrosion of the tank.

All the best,

Peter

Thank you, haven't thought of my anode rod in years.

 

[TheGoose]

I agree with "The Goose". On the holding tank there is a tire pressure looking stem. If you depress that and water comes out the bladder is ruptured and time for a new tank.

I had heard it referred to as water logged, same principle I guess as the air logged description.

Not correct. Big misconception. Hydropneumatic tanks do not have a bladder. It's literally air over water.

 

[part-time-Farmer-NC]

Interesting. I think Water Worker the maker of my pressure tank didn't get that memo. I thought I remembered reading it in their literature when I installed mine a couple of years ago.

 

[steve tym]

There are captive air tanks and hydropneumatic tanks. The OP stated he had a hydropneumatic.

 

[part-time-Farmer-NC]

There are captive air tanks and hydropneumatic tanks. The OP stated he had a hydropneumatic.

Ah... Didn't catch that. didn't even know there was such a thing.

Thanks for the correction.

 

[steve tym]

Old school. That's what my grandfather used to do in the winter, run around and "balance" (add air to) peoples tanks

 

[TheGoose]

Interesting. I think Water Worker the maker of my pressure tank didn't get that memo. I thought I remembered reading it in their literature when I installed mine a couple of years ago.

Yours is not a hydropneumatic tank, as pointed out. It's a bladder tank, sometimes called captive air tank or diaphragm tank. We use hydropneumatic here for several reasons, one of which is that sometimes the water can smell, and the air-over-water will help dissipate the smell.

 

[part-time-Farmer-NC]

I had to google them. As far as I know its not a common practice around these parts to use that type. See there is more than one way to skin a rabbit/cat/deer....

 

[Valveman]

Like was said, hydro tanks are "old school" these days. But there are places that have Iron or Sulfur and the old hydro tanks are still the norm in those areas.

 

[TheGoose]

Well, did you figure it out?