Hello,I need to buy a new sump pump,one with a battery backup,or 2 with a battery backup for my Mother's basement,plus a new dehumidifier for the basement and a steam cleaner to clean the basement carpeting. Any suggestions? My main concern is whether to buy 2 zoeller pumps and tie them together into existing discharge or just get 1 new pump with a battery backup and have an extra pump on hand.Someone is usually always there. The old pump worked fine for almost 8 years with no 2nd pump or battery backup installed.the pump,which was a hydromatic SW25/33 just stopped.I appreciate any advice you can give on this.Thanks alot!