Pressure-washer user problem.

[omalleyboy]

When I use my pressure-washer connected by hose to our domestic water taps, my water storage tank overflows. I have fitted a non-return valve between the tap and the hose but it makes no difference. Is there someone out there who will know what is wrong and will tell me how to overcome the problem?

[anniebird]

You say TAPS - does that mean you are connecting to two taps or to mixer taps? I had a dish washer which connected to mixer taps and I was warned not to have both the cold and the hot taps on together as the pressure of the cold water would push through the hot water side and into the water tank inside the tap. This may be what is happening to you as you say that a non-return valve between the tap and the hose does not work. The cure is to only have one of the taps turned on while the pressure washer is connected.