I don't think u will b disappointed in this compact unit. I mounted mine under the cabinet above my sink and leave it hooked up to the supply water with the adapter they provide. Very convenient. There is a quick flush system. Use this for about 5 min. after u first install it. Then turn it on for about 30 sec's periodically. They didn't say anything about it in my directions and I got the info. online. Also, don't forget the TDS meter. It's important to have one, so that u know the unit is working correctly and when to change filters