solar panels

Hi

A few month ago I installed a solar panel for water heating.

I have a problem.

The installation loose pressure, and malfunction.

There has been problems with tight connections, which should have been solved.

Because of bad connections I have lost 30m cubic, of water. The filling valve was on the community water, at that time.

But when pressure rises the security valves will open and let water out, and of course, the pressure shall fall.

The water loss, and the amount of water to fill it up should probably not be much.

Now I look for a solution with less water loss.

I am not exited about , the system is on automatic water supply from the public.

I have thought of a solution, with a little water deposit maybe 200l, from wich the system could be supplied via a 

dives pressure pump.

It should give a little more stability to the system, and longer period of function, and limit water loss.