I recently retired from the fleet maintenance dept of a large utility company. We had the EZ Drain valve on all our trucks and never had an issue. Many of the trucks spent considerable time off road in very rough terrain building the power transmission lines. Never had one of the valves leak or get knocked open. Other than the expense, I would highly recommend the product.
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper,
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