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Eberspacher Water Pump O Ring 19.8x2.3 Suitable for the following Eberspacher Water Heaters 252434050000 M-II D10W 12V 252435050000 M-II D10W 24V 252470050000 M-II D8W 12V 252471050000 M-II D8W 24V 252472050000 M-II D12W 12V252473050000 M-II D12W 24v