I'm hoping that someone can help me. I have a pressurised indirect hot water system, and I noticed last summer that there was water dripping at the tundish. I measured the pressure at the top of the expansion vessel and found it to be zero. I therefore called in a plumber to take a look. He turned off the water, opened the hot taps and then recharged the vessel to 3 bar. Everything then seemed to be fine. However, the vessel has started making a loud "whooping" when a hot tap (or sometimes a cold tap) is turned on. It doesn't do it every time - usually only when no taps have been on for a while. It's starting to happen more often, though. I’ve attached a recording of the sound (zipped mp3 file).
Does anyone have any ideas what the problem might be? The hot water cylinder is a Kingspan Indirect 210L and the expansion vessel (supplied by Kingspan with the cylinder) is a Zilmet 110 Ultra Pro. Our incoming cold supply pressure is regulated at 2 bar.
Any advice would be gratefully received!
Does anyone have any ideas what the problem might be? The hot water cylinder is a Kingspan Indirect 210L and the expansion vessel (supplied by Kingspan with the cylinder) is a Zilmet 110 Ultra Pro. Our incoming cold supply pressure is regulated at 2 bar.
Any advice would be gratefully received!
