During normal operation, water flows to the filtering system through two or more main drains at the bottom of the pool and multiple skimmer drains around the top of the pool.. We've already seen that the water in a swimming pool needs to circulate through a filtering system, to remove dirt and debris. The return port A typical vacuum port A pool vacuum cleaner How then is the water drained from the pool and re-circulated? The return port A typical vacuum port A pool vacuum cleaner We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. The return port A typical vacuum port A pool vacuum cleaner A channel is constructed around the edge of the pool and inside this channel there are drains (normally called gutter drains) which […] Pools that do not have skimmers normally have what is called an overflow system. Overflow Pools Not all in-ground pools have skimmers. You consent to our cookies if you continue to use our website. The return port A typical vacuum port A pool vacuum cleaner Weird & WackyWe use cookies to personalise content and ads, to provide social media features and to analyse our traffic.