Rather than start another thread titled "Another Vacuflush Question" I thought I would tag on to this one.
I have two Vacuflush heads and both seem to function well with vacuum recharging after about 35-40 pump cycles, about 30 seconds. However they sound very different when recharging. One produces a relatively soft (quiet) pumping sound when building vacuum and the other sounds like it is hammering when making each pump cycle. Ideas as to what is making the pounding sound?
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