Tinkering with my ballcock

amandstu

I have installed a new water tank and the inflow was too slow.

To counter that I have replaced the insert (in the ballcock) with one that had a wider diameter hole (same size otherwise).

Now ,despite bending the arm down to lower the level at which the float kicks in and cuts off the inflow the tank overflows.

Can I find another insert a little smaller than the one I have in now?

Is there any other way to reduce the pressure ?

antiskeptic

amandstu wrote: »

I have installed a new water tank and the inflow was too slow.

To counter that I have replaced the insert (in the ballcock) with one that had a wider diameter hole (same size otherwise).

Now ,despite bending the arm down to lower the level at which the float kicks in and cuts off the inflow the tank overflows.

Can I find another insert a little smaller than the one I have in now?

Is there any other way to reduce the pressure ?

This doesnt make sense to me. A larger orifice (and all else equal) merely increase flow rate. Pressure of fill remains the same and the ballcock should shut off at exactly the same level as before (without adjusting it down)

Sounds like the new orifice isnt a match and isnt shutting off at all

agusta

fit this float valve
https://www.ie.screwfix.com/pegler-prestex-float-valve-part-1.html?utm_source=Google&utm_medium=CPC&utm_campaign=Shopping&gclid=EAIaIQobChMI6NG20Mbt4AIVUOd3Ch0EWQi1EAYYAiABEgKkGvD_BwE&gclsrc=aw.ds

amandstu

agusta wrote: »

fit this float valve
https://www.ie.screwfix.com/pegler-prestex-float-valve-part-1.html?utm_source=Google&utm_medium=CPC&utm_campaign=Shopping&gclid=EAIaIQobChMI6NG20Mbt4AIVUOd3Ch0EWQi1EAYYAiABEgKkGvD_BwE&gclsrc=aw.ds

Thanks, I see another float valve on that page is pressure specified as 10 bar.

Would the one you pointed out be higher? (it doesn't actually say ;just that it is "high pressure" )

b318isp

Did you drop or forget to install the seal? They can sometimes fall out when the valve is disassembled.

If you raise the arm manually, and the flow doesn't stop then this could be your issue.

Mains pressure is around 1-2 Bar.

agusta

amandstu wrote: »

Thanks, I see another float valve on that page is pressure specified as 10 bar.

Would the one you pointed out be higher? (it doesn't actually say ;just that it is "high pressure" )[/QUOT
its for mains water pressure

K.Flyer

amandstu wrote: »

I have installed a new water tank and the inflow was too slow.

To counter that I have replaced the insert (in the ballcock) with one that had a wider diameter hole (same size otherwise).

Now ,despite bending the arm down to lower the level at which the float kicks in and cuts off the inflow the tank overflows.

Can I find another insert a little smaller than the one I have in now?

Is there any other way to reduce the pressure ?

In a brass high pressure ballcock the rubber seal that closes up against the valve insert oriface is sized for the smaller opening and will not adequately cover any of the larger cones.
For a maximum flow rate I would recommend the FluidMaster Pro75B (with brass threaded shank).
Otherwise contact Irish Water regarding your inadequate water pressure.

Browndoff

It seems that the valve is now NOT sealing.That must mean that the new orifice does NOT match the valve into which you put it OR some piece of grit is preventing it seating properly.

It seems that the circumstance needs a LOW-Pressure-Valve [one with a big orifice] but your initial failure, to me, seems to suggest that you need to replace the whole valve [so that all the parts match each other], or, at least, that you match the ORIFICE to the PISTON. These are the two parts which form a mating-surface to stop the water-flow.

Don't worry, you need not be drowned making the change-over! Just line-up all the components and the necessary tools and LOOSEN all the nuts on both the old and new valve; then you can remove the old and hold your finger over the outlet while you line-up the mating new component. The switch can be done quickly-enough to avoid overfilling the little tank.

Good Luck, Browndoff