BZ 3.1.1 Pump Noise

[MrJay83]

Has anyone had their BZ pump make this noise? It's definitely not blocked (stripped down and cleaned last brew) and I didn't notice this cycling hum until after the grains went in (NEIPA recipe) but the wort is still flowing now problem.
Maybe just age? She's almost 2 years old now.

Cheers
J

 

[Slid]

How many times have you brewed using this model?
Should be good for well over a hundred uses.
Is the pump pushing out just liquid, or is there some air coming through? That might be part of the issue?

 

[MrJay83]

Probably 50 times now.
I've literally just started the hopstand /whirlpool and there is no noise at all and pumping like a trooper. Very strange. I don't think a bit of stuck grain would have made those cycling hums.
Sidenote... What a day for a brew out the back in NI!

 

[Twostage]

I had something similar with my G4, turned out it wasn't the pump, something else was rattling (can't remember what it was now).

 

[MrJay83]

Definitely was the pump. Sounded almost exactly like a KL bucket blaster running but just pulsing. Mines not too old... Maybe there is a gen 4 pump in there