Yep, count me in the crowd that thought a filter was overkill... learned the lesson the hard way. My portable buddy (Dyna-Glo from cheapo depot) was run off a bulk tank for about 4 or 5 years and then the pilot hose clogged. I ended up reaming it with a piece of wire, and I guess the pilot hose is more delicate than I thought because the pilot flame got 3 times as big and now burns too much gas and actually seems to heat up less. Bought a new heater this year and just use the other one at home in the garage.