combi and showers

[plumberpauldove]

hi does anyone know a way to reduce or eliminate pressure drop when multipull showers are run off a combi.

 

[PlumbBobBob]

Re: Hints, tips & secrets of plumbing.

yes don't use multiple showers at the same time or change one to an electric one. this should have been suggested when the combi was installed imho.

 

[plumberpauldove]

Re: Hints, tips & secrets of plumbing.

hi the combi hasnt beeeeen installed yet the customer has had second thoughts typically after first fix is complete have you ever seen or heard of anyone fitting a pressure reducing valve at inlet to combi feeding cold to showers off the balanced cold connection and adding an accumilator to keep pressure constant when high demand. im thinking it should work but not totaly sure lol

 

[tamz]

Re: Hints, tips & secrets of plumbing.

It won't work as the flow rate through the combi is restricted. There will be enough cold but never enough hot no matter what you add. Change the system for a system boiler and an unvented cylinder.