Low Water Pressure

Not fully opening the isolation valves after the plumbing work was done.

I've checked the valves and all is ok.

It could be poor quality valves? It would have to be two though.

Thanks.

Is it actually low pressure or low flow? If you stick your finger over the end of the cold tap and attempt to turn it on, does the pressure force it off?

Most likely it's the hoses. Small ones intended for 1/2" or 15mm use often have an internal bore of 8mm or so. This is not too bad on a short hose, but on 2m, the flow is going to be poor.

The remedy is to get the plumber back to do the job properly. Burying flexible hose under the floor is a bodge. It needs to be done in proper 15mm tube. Plastic is a possibility if a little flexibility is needed.

I've checked this and it looks like low flow.

I wont get the plumber back I'll do it myself to ensure it's done correctly (and save a packet).

Does anyone know what BAR rating a kitchen tap should be?

Thanks.