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  1. S

    What does this debris look like to you?

    We've recently done a power flush on a system that's already been power flushed twice within the last 5 years. System boiler with an unvented HW cylinder and 3x UFH manifolds. Quite a large house. Strainers installed before each manifold - fully clogged. The stuff we got out of it looks like in...
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