"Ghazali" wrote in message
m...
snip

Incidentally what will happen to the pump if i test it without any
water flowing through it (i.e. just air). I've heard this can be
terminal - but is the effect immediate - or does it need to happen for
a few minutes before it dies out on you ?


AIUI it depends on the construction of the pump, some will self destruct
promto, others will be OK, so unless you know what you're dealing with.....

BTW this is pumps in general and not specific to shower pumps.