Low water pressure "help"

[Robby G]

I have just moved into my house which is about 5 years old and I seem to be having an issue with my water pressure.

Every time I flush a toilet I can't use the cold water tap (nothing comes out) until the toilet system is full and then it works fine ? Is this normal as I have never experianced this before.

Also the water pressue in the whole house is very low with no real pressure any ideas on how I can improve this?

Many thanks
Kind regards

 

[Prof.plumb]

If the stop tap to the house is wide open (check that) then it may be that the washer has become dislodged hence blocking/ restricting flow of water.

 

[Robby G]

Thanks, I will check that first thing.