advice re keeping combi boiler and adding a booster pump

[selondonman]

hello, was chatting to a friend, he has a good size 5 bedroom house .. current system is a combi boiler and he is looking to upgrade bathrooms and water supply as currently using a tap stop the hot water to the shower

i was surprised when he mentioned to me the the plumber is recommending keeping the combi boiler (4 years old) and adding a stuart turner booster to get the required pressure for the water stores in a 300l Main Cylinder (with pressure inlet kit and expansion vessel) up the the bathrooms on the 2 upper floors ..

i was told pressure was 4 bar

would you only keep a combi boiler if putting a new pipe from the mains proves to be tricky ? house is 1930s with i assume original pipe from mains

i assume a pressurised system including new boiler only works with a pressure that the original pipe cant supply and the pump is the only option

thanks for your advice

 

[gmartine]

Tell your friend to find another plumber.

 

[gingalig]

I'm with gmartine on this one

 

[ShaunCorbs]

Need an unvented cylinder you can keep the combi just feed the bathrooms from the cylinder

 

[Scott_D]

You sure they are not useing the combi as a system?

 

[Chalked]

Sounds ok to me.
Keep combi to do the kitchen and run a hot water zone in.
300 litre pressurised cyl for the rest with a booster pump and break tank.
I would fit a dab e sybox, booster,if you have room, as they are quieter.

 

[gingalig]

Think l,ll just go back home and eat my weatabix. It might help looking at the box If I concentrated really hard i might think outside of it.

 

[Old Account]

Sounds ok to me.
Keep combi to do the kitchen and run a hot water zone in.
300 litre pressurised cyl for the rest with a booster pump and break tank.
I would fit a dab e sybox, booster,if you have room, as they are quieter.

Agreed.

 

[gmartine]

Thought the ST booster pump could only provide 12l/m?