DIY Doctor

shower pump fitting

Postby ericrw » Sun Nov 11, 2007 11:30 am

Ideally the feed to a shower pump from the hot water cylinder should be a dedicated supply. But Is it acceptable for the feed to the pump to be supplied from the lower half of the cylinder's vent pipe ? I hope it is because that is what I would have to do when I fit a pump. :?
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Simply Build It

Postby marrtin » Sun Nov 11, 2007 10:12 pm

I have seen many installations where this works ok, but the header tank must be in the loft and preferably as high as possible. This is to avoid air from being drawn down the expansion pipe and into the pump.

Shower pumps are thirsty beasts, and you may be wise to install an additional header tank

Remember also, that the cold draw off from the tank must be below that of the hot so if the tank runs dry, the hot flow will stop first.
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