Leak at rear of new impulse

[atechbh]

My new impulse is leaking badly at rear
Probably through screws. What does everybody use to deal them up. They are all very tight.

[iop65]

doubt if much water is able to come in through the screws
don't overtight them either , no need for that

have you put it in your bath ( just floating)to see where the water is entering?