cisterns surcharging

oldhand

Hi all,having a plumbing problem at home and wonder can anyone give me any pointers.Basically when the washing machine is filling or when the shower is being used the cisterns of the toilets in the 3 bathrooms all start to fill even though they are already full and then the water runs to the overflows in the cisterns,when either the washing machine or shower stops the cisterns stop overflowing.
This has only started in the past few weeks and im wondering is it a straight case for a plumber or anything I could look at first?Any help greatly received.

keystone

Are the three fill valves in the toilets all the same make/model and if so what is it. If you don't know make/model can we have a pic of one of the fill valves please?

Cheers

oldhand

keystone wrote: »

Are the three fill valves in the toilets all the same make/model and if so what is it. If you don't know make/model can we have a pic of one of the fill valves please?

Cheers

Hi,thanks for the reply,markings on all say "wras fluidmaster" the house was built 6 years back.