I've fitted my new Surflo pump kindly supplied by Roy Harding.
Trouble is, I'm not sure everything's ok.
It's "pulsing"

Instead of whirring away, it's going pump,pump,pump,pump,pump...
Not like when my old pump cycled for 2 seconds on and off.
This is quite a fast rhythm and it's making the water splutter out of the jets.
Is this adjustable, or is that what Surflos do?
