[mark mann]

Hi all
Could anyone tell me if they have had a pump make knocking and kinda labouring type noises when filling?
it seems fine when in use but when filling its knocking and vibrating and sounds like its struggling to to work.

just replaced the secondary pump after it had seized (my fault didnt use frequent enough) typically this one sounds like its on the way out after just a year literally.

any one with similar problem past or present?