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Your pressure washer pumps may be damaged when trying to utilize a non-pressurized water source. The water pumps in pressure washers are not designed to "suck water" or draw water in--they are built to accommodate a pressurized water source. If pressure washer pumps are forced to suck water in, they draw air in along with the water, which can damage the equipment. Always use a pressurized water source!
hi id like to hear from anyone who runs a pressure washer from a tank not a water tap
They can only suck in air if there is an air source. If they are connected to water with a solid connection without any leeks, there will be no air. You can't make air out of thin air!