One Cold Night In A Van Cracks A Pump Head. It Is Not A Warranty Claim.
Water expands by roughly nine per cent when it freezes. A pump head is a rigid, sealed casting with water trapped inside it. That is the whole problem, and it is why frost damage is the second most common pressure washer failure we repair, after water starvation. It clusters in November and February; it arrives in batches after the first hard night of the season, and it is almost always excluded from warranty because it is preventable.