I have 15 downspouts that go into 4" pipe. I took off downspouts. they were packed with leaves, dirt, twigs. The 4" pipe travels vertically about 4 foot and then heads for the street. These pipes are also packed with the same debris.(I think only vertical portion is clogged). I have a 2200psi @ 3.2 gpm pressure washer. I was going to get a 1/8" or 1/4" flexible line with a jet tip (1 forward, 3 rearward) to clear these pipes. Will the 1/8" line deliver enough volume and pressure or should I buy the 1/4" line (I don't want to buy both). should I get 50' length or 100'. thnaks so much