Shower installation with a combi boiler

[malty123]

I,m going to fit a new mira shower that will run off my combi boiler

Is it just a straight connection to hot and cold water feed or do i need to fit a one way valves to the hot water feed?

any other reccomendations ?

thanks

 

[Agile]

I would always recommend a non return valve in the hot feed EVEN if the shower says it has one built in as they are very poorly designed and often get stuck open with dirt.

Its best to fit one in both hot and cold so the flow resistances are more balanced.

Tony.

 

[malty123]

will get one for both hot and cold then

many thanks

 

[malty123]

Just reading the shower installation instructions and it says to fit a water expansion tank to protect the shower if one is not fitted in the combi boiler
(seperate tank to the CH one)

does anyone one know if my combi has this extra internal expansion tank in addition to the CH one

Its a ravenheat he120 lonox

and if do need to fit an external tank where is the best place to fit it, and how big will it be, it also says the tank needs to be regularly maintained.. how do I mainatin it and how often?

cheers

 

[gas4you]

No it doesn't. This is a new one on me, I always fit Mira Excel showers to combis and have yet to see this instruction, or in fact to ever need to fit non-return valves.