My wife and I recently bought a used 2006 pilgrim 36 foot 5er. Have done some work on it. The hot water tank thermostat and control. Everything works great so far, BUT I can't find the water pump switch inside. I have heard it is in the kitchen or bathroom??? We have not needed the pump for fresh water tank yet, since we camped at a couple of locations that we hooked to water. Other ?'s Do we need a water filter? Should I get a surge protector? TPMS? Tires are LT's and old. I have read a lot on these forums about SAILUNS and I am leaning toward them. Thanks in advance for any help on my numerous questions. PS, Pilgrim is out of BIZ, so if anyone out there has one, ANY tips would be appreciated.