Toilet cistern doesn't fill

kozak

Hello

For the last 10 years ensuite toilet cistern was slow to fill, now doesn't fill at all. Main toilet is fine. Plumber changed fill valve in cistern, still doesn't fill. Both toilets getting water from water tank, which according to plumber is unusual and is the reason for low pressure in ensuite (4m from water tank). Main toilet is adjacent to water tank so pressure is ok. Plumber suggested to connect toilet either to main water supply (a bit messy job) or to the pump (requires new pump as current one has no output for toilet). Toilet water supply goes via 1cm pipe. My suggestion to clean that pipe was dismissed. My apartment is on the first floor of four floors building in Dublin 18.

Any views, suggestions?

Thanks

kozak

Any ideas how to make cistern fill if water pressure is low?

Sleeper12

https://www.boards.ie/discussion/comment/118585445#Comment_118585445

Depends on the filler in the cistern. Usually they have a filter that you can remove or restrictors that can be changed to allow faster fill

kozak

Plumber ensured restrictors adjusted for fast fill. Still doesn't work. Plumber suggested to connect cistern to pump, but this solution requires new pump with proper connection. Sounds like overkill!

Sleeper12

You must live in an apartment so?

mickdw

Does water flow when system is opened up?

kozak

Yes, live in first floor apartment of 5 storeys building in Dublin 18

kozak

water flow when system is open - no flow

blackbox

I'd suspect that the supply pipe is either blocked or airlocked.

Sleeper12

Most likely the cold water tank is in the appartment itself. If this is the case then it does not have the height to create good pressure & flow rate. Assuming this is the case then installing a booster pump is the only thing that will improve it

Edit: on reading the OP again I see that you have a pump. If this is just a shower pump then the plumber is correct that the pump will need replacing. If you have a bigger pump then he should be able to tap into the 3/4 inch cold pipe coming from the pump

kozak

https://www.boards.ie/discussion/comment/118590502#Comment_118590502

How pipe can be checked or cleaned? It is thin, about 1cm diameter. I've asked plumber about pipe, he said it's unlikely

kozak

Plumber suggested new pump options for my apartment - either Moonsoon 2 bar for 700 eur, or Grundfos 2 bar for 650. Both negative pumps. Which brand is more reliable?

Would prefer a bit higher pressure in the shower but not sure if it's a good idea. Current pump Grundfos 2 bar, 10 years old

Sleeper12

ST Monsoon comes with a 5 years warranty. As far as I know the Grundfos only has 2 years warranty. Nothing wrong with going for 3 bar for the pressure you want. It will cost more for the bigger pump & you will use more hot water. Food for thought