Frothy hot water!

Since the last 5 days my hot water comes out of the tap like white shaving foam!
The cold water is unaffected.
My hot water system is a sealed pressurised system (3 Bar) with a 500 litre (yes 500 litre!) dual coil hot water tank (1 coil for condensing gas boiler and the other to a solar panel).
Approx 3 weeks ago I drained the tank to replace an immersion heater that was causing a leak. This was successful at curing the leak but 5 days ago the foaming started.
The hot water pressure is unaffected and the foaming settles after approx 5 seconds if the hot water is poured into a glass with no sediment etc.
I have a Kinetico water softener (approx 5 years old) attached to this system-could this be at fault- the frothy water feels very "soft" and has a "metallic" smell
I would appreciate advice on what could cause this problem

Many thanks

Hello;My guess would be air has remained in the system, or you have another leak somewhere. Look for another leak, and if you find none, run out some hot water and give it a short while to settle down. I should add that I am not familiar with solar systems, so maybe someone here can answer farther

Could it be some sort of preservative on the new equipment? Some sort of light weight oil or something? I'd run it for a while and see if it flushes out.

Jason

If the "foam" clears from the bottom of the glass up to the top of the water, the foam is caused by 'air' or another gas in the water. In many cases this is normal due t oheat expanding 'things' wich causes dissolved gasses to come out of solution but... you could also have an air leak ading air to the water. try turning the temp down a bit and see if the foam decreases any. A leak may be in the solar part.

frothy --white milkey hot water

read somewhere 3/4 the way down in this trouble shooting gide I got posted

it talks about frothy milkey hot water , its cause ect...


it really does not say that their is a remedy,

but after reading it all again myself I wonder if something like

a thermal expansion tank on the water heater would solve the problem??

giving the bubbles somewhere to rise up into???

dont know for sure if that would work or not......


http://www.weilhammerplumbing.com/galleryiii/

An air extraction scoop like used in a closed hydronic heating system? Maybe something like a Sprirovent? BTW, what do you guys prefer in those situations?