Flush that bathroom wipe down the toilet and it could end up costing the City of Manteca at least $200.And if conditions are just right, it could cost you more than that to unclog your own sewer line.“If we get a call out for service because of a back-up, it costs the city at least a couple hundred of dollars,” noted Public Works Director Mark Houghton. “If a pump is damaged, the cost (goes up substantially).The latest culprit to create problems for Manteca and other wastewater treatment systems are bathroom wipes being touted by manufactures of bathroom tissue as an “upscale” option.Houghton said while they are indeed flushable as the manufacturer claims what they aren’t is dissolvable. Toilet paper, by contrast, dissolves fairly rapidlyBathroom wipes often will either float to the top or sink to the bottom of pipes.