My upstairs toilet takes ages to refill after a flush. I had a peep in the cistern and saw the water filling. Is there any way of making the water fill quicker or is the problem due to water pressure from downstairs?
It's probably something in the fill restrictor (at the inlet into the valve)
You need to turn water off and investigate the valve.
There are a few types of fill valves .. a couple use the conventional ball on stick to close valve .. but valve bodies and designs are a little different.
Have a look at the inlet filter. In some toilets, it's in the bottom, where the water supply pipe joins. In others, you can access it from the float valve in the cistern. It could be the inlet valve (which costs about 3 quid to replace) as they can split and cause the water to trickle.
I think it's always been on the slow side to refill which is why I thought it might be due to water pressure. The water refilling the cistern comes out of a white plastic tube. I will have to get hubby to read what Albags and Flip have suggested when he gets home from work as it's beyond me!
I remember when I was a child, we had a toilet which filled up so quickly but it was very noisy when it was filling!
Basically .. if the whole valve is plastic .. with a threaded outlet boss .. you might need a small repair kit .. few quid from plumber's merchant. That is a pressure sensitive type .. large rubber diaphragm and a needle in an orifice.
If it's metal body, it's an old-fashioned type and needs the valve taking apart to clean and replace the ball-valve washer. There may WELL be something caught in the plastic inlet restrictor .. they are coloured according to flow.