Renting a house with a pool & have just opened it up for the summer for the first time.
Have a question about the inlet pipes to the pump. There are 3 - one for the skimmer, one presumably for the drain at the bottom of the pool & one labelled 'waste'. No idea what this could be for & have left it closed - circulation system seems to work ok without it.
Any idea why this is labelled 'waste' & whether I should leave it closed?