Can I? Impeller pump

[Deleted member 113604]

Hi all. I have a single occupancy house with gravity feed hot water.
The hot cylinder is downstairs with a cold water tank in the loft.
The hot comes straight out from the cylinder then 90’s up to the first floor bathroom tap, then the bath & back downstairs to the kitchen sink. There is no flange or branch to a vent pipe from the cylinder. There is a vent/overflow pipe to the cold tank which as far as I can see is somewhere on the hot run after all the taps. Can and is there a pump I can use to boost the hot pressure? With out having to worry about a flange or where the overflow is situated? Ideally I’d like to put the pump after the bathroom sink & before the bath( under the bath) if not on the vertical run up from the hot cylinder. I’ve looked at the Grundfos ssr2 & the salamander ct55 but worried about the air bubbles from the cylinder being a big issue. Any advice would be appreciated. Thank you. Tony

 

[BLOD]

If I've understood your description then no you can't put a pump on the hot water system as it is.
You will need to put an open vent pipe in before any outlets or go for an unvented system or maybe some other potion.
Best to get a plumber to take a look and advise what your best / most viable options are.

 

[king of pipes]

No not really the best option is a alteration to the way your cylinder is plumbed threre needs to be a vent before the pump. Kop