Response to I think that this is my replacement pump for Part # 7-177453-03. My only question is my pump has an approximately 1" grey plastic pipe coming out of the rear of the unit making a left hand turn and going forward. It doesn't look like your pump has an opening for this grey tube. Can you advise? Also how difficult are these pumps to change out and do you need any type of sealant? Thank you, Lane

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