I'm aware that I have to clean the filters on the heating unit and the split system air-conditioner, and that it's a good idea to operate the pressure release valve on the hot water system occasionally. But I have just learned that there's another item to add to the list: the inlet filter on the rainwater tank.
We had the water tank installed a matter of weeks before the drought ended (not sure if this was entirely coincidental). Hence, we haven't need to draw on it to any significant extent.Be that as it may, I glanced in its direction, and noticed a thistle apparently growing at the top of the tank. Closer inspection revealed that there's a filter at the inlet point. It was completely clogged, so much so that there was ample muck for the roots of the thistle I hadn't previously been aware that this filter existed, but now I know that it's there and needs to be cleaned out regularly.