Hello, new pool owner. Have an 18x48 Coleman Frame Pool which has two 1.25" outtake hoses going to the filter and the only way to stop the water is to put in plugs. I just ordered the Intex 3000 GPH Sand Filter Pump and my question is how often do you have to shut off the water from the intake hoses to the sand filter? What kind of maintenance situations require that? I saw that you can buy a plunger valve but honestly I'm over spending money on this bad boy so while I have no doubt it would be useful, just wondering how often I'd really need it? If not too often I'll stick with the plugs for now and save additional niceties like this for next year (my list of such things keeps growing!). If its something I'm having to do all the time though I'd just as soon get it now. TIA!