Thats the one, must be a new product by Sealey they weren't' available when I was looking. Had mine a while now. The OE one is Brass, mine is Aluminium, these look like Plastic hence the price difference I suppose. When you use it you need a fair amount of force against the spring on the filter casing, just be careful not to cross thread the tool. (not intended to sound like I'm trying to teach my granny to suck eggs

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Keep me updated if you manage to get the pump working please.