I am in the process of installing a shower pump and while I was
researching the ways and means I kept coming upon info that said the
max temperature on the hot water side was 65 degrees C. Is that a
legal/standards requirement (to prevent scalding if the cold failed)
or is it a limitation on the pump (cavitation or somesuch)?
Does anybody know? If so please share your knowledge.
remove 'spam' from email to reply
One reason those with pumped showers are tempted to increase the temperature
is that, when the shower mixer tap is set for equal amounts of hot and cold
(and usually, therefore, for non-thermostatic mixers, also maximum flow),
the shower is too cold. Increasing the temperature above 65C does make the
hot taps somewhat dangerous though! Personally I have mine set at 65C for
the first reason, and no higher, for the second. Decent manual shower mixers
(like the one I have) have insertable endstops to limit the travel in the
hot direction to prevent scalding.
To take up on another point of the OP, it should be impossible for the cold
to fail before the hot if the shower has been installed properly (at least
in a "conventional" vented DHW system) - the shower should have a separate
cold feed from the header tank, taken from a point below the take off for
the DHW. This means the hot always fails first.
(anti-spam is as easy as 1-2-3 - not)
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.