It's just a fat 'O' ring. Can't be more than a few pence. When you come to empty the housing, Open the water drain and pump the primer bulb. This will reduce the pressure and reduces the leak when you take the top off the housing.
It's just a fat 'O' ring. Can't be more than a few pence. When you come to empty the housing, Open the water drain and pump the primer bulb. This will reduce the pressure and reduces the leak when you take the top off the housing.
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