Filter restrictor. How do I calculate pressure to the cistern

[jrtrrror]

Hi. Just about to connect the cistern and came round to fitting the filter restrictor. At first I couldn't push it in to the inlet, however it just needed a little push.
Is that normal?
More importantly, the instructions state you should cut it down accordingly, depending on the water pressure.
I don't know what pressure it is to the toilet and no gauge to measure it

What should I do?
Ta

 

[townfanjon]

The only way is to use a pressure gauge , do you know a friendly plumber , its not hard to test with the right equipment

 

[ShaunCorbs]

TBH I never fit them just install a good quality fill valve eg fluid master

 

[jrtrrror]

How crucial is it?
Can I not fit it without cutting it down?
I assume it will just fill really slowly if the pressure is low. Is that correct.
I can take it out later and cut it down.

 

[ShaunCorbs]

You can try it as is and see how you get on and as you say if it's slow remove and either leave or cut down

 

[jrtrrror]

You can try it as is and see how you get on and as you say if it's slow remove and either leave or cut down

Thanks Shaun