[Paul Redden Countryfresh]

My three stage vacs seem to be on the weak side, the inlet filter is clear, I want
to check the internal fans for blockages, has anyone had success removing the end cap?

[John Kelly]

Have you checked the lid, air leakage more likely the cause. Create some smoke and waft it round the lid and see if it gets sucked in.

[Mike Gwilliam]

What machine do you have?

[Paul Redden Countryfresh]

Good idea about the lid....its a ninja

[Adrian Walton]

It could also be the vac gaskets sometimes they come loose and get sucked in causing a leak.

[Simon@arenaclean]

Above average foaming is a sure sign air is getting in somewhere, alternatively if the vacs are on  high hours they will become less effective. Another possibility is a hole or slit in the vac hose, have you tried a different hose or check the cuffs?

[Paul Redden Countryfresh]

Thx Simon, think its a combination of thin lid gasket and leaking cuffs