Slightly disgusting question about toilets

[RubberTeeth]

Apologies for this question, but welcome advice. We had a bathroom refurb a few months ago. It looks fantastic, and everything works well - except for the new toilet. It doesn't seem to flush away what it should, and we often need to use a brush. This is pretty disgusting - and it's not as if we have changed what we eat. We also refurbed our downstairs wc with another brand of loo. No problems there. Trying to figure out if the issue is the plumbing or the design of the loo.

Does it have an eco flush?
Sometimes they don’t push enough water through.
Pan shape also affects, ahem, brush needs.

Might be the design of the toilet, might be a flow restrictor limiting the amount of water going through the cistern for environmental reasons... Can you access the cistern to see how full it's getting?

It does have a two flush option - neither makes much of a difference. I will check on flow restrictor. Useful tips @Tingface and @RnBrie

With my duel flush I have to hold both buttons for 5 seconds to achieve a full flush

We did the same and now we have a good (expensive, branded) loo and a rubbish (cheap, generic) one. I'm sure there are decent cheap loos too, but I don't think it's an accident that the loo that cost 3 times as much is better than the cheap one. It uses less water too.

I had an identical problem, it was caused by incorrect installation. The toilet had a tiny air leak at the base, where the toilet entered the soil pipe. The air leak allowed air to enter during a flush, which negated what the plumber called "the vacuum effect".

I have recently had a new one installed. Much discussion with the plumber about which brand to get etc.

As I only wanted one that worked and fitted in the small room I wasn't looking for anything modern, and I don't have a square bum so wanted a traditional shape. He told me not to get the cheaper ones because they are crap. It may be that you have one of those.

I also have this problem and it is one of my pet hates. Argh! I think it is the design.

That's interesting CanadianJohn, I hadn't considered that

Is the problem with floaters or with skid marks? I have found that there are some low water use bowl designs where everything sort of lands on a ledge rather than directly in the very limited water. It may or may not then slide down; either way brushing is needed. Seems more common in southern Europe.

If things just don't go down, then it could be either a problem with water/installation or again just a shitty design, if you'll pardon the expression. Check that the ballcock is calibrated so that the cistern is actually filling up to the right level.