combi and cold water pressure

hornetstinger · 9 Oct 2019 at 17:15

I'm getting a combi fitted and I would like the cold supply not to be mega high pressure, mainly for safety if the toilet ball **** sticks and if it fills so fast outflow will not be able to cope with the difference. Also with pipes not sure how the welds are, so don't need the toilet to refill in five seconds flat.

What is best and where should this device go? Just after then incoming shut off for the house supply? Theres pressure reducing and gate valve or something

hornetstinger · 9 Oct 2019 at 21:42

Combi isn't fitted yet, it's a older style toilet with overflow to outside, not to cistern.

Also older pipes not sure if they can take mains pressure.

Also turning down isolator is not a good idea

hornetstinger · 9 Oct 2019 at 21:49

Possible to reduce cold flow to taps and toilet but leave supply to boiler alone? So get full hot flow from boilrr

hornetstinger · 9 Oct 2019 at 22:01

Participant said:
If you reduce the mains supply flow the performance of your combi showers and baths will be reduced.

God knows why you'd want to do this. None of your reasons make sense really.

Yeah understand flow rate will be decreased just thinking prevention, as I came home and cold tank was overfilling so want to prevent things like that, if cold supply after boiler is reduced I mean do you need full pressure for cold around the home? No. Whatever traditional boiler pressure for cold (cold tank) is enough, combi cold pressure is over the top.

hornetstinger · 9 Oct 2019 at 22:23

If cold water can be reduced after the boiler that would make sense right?

hornetstinger · 9 Oct 2019 at 22:27

Yeah I know combi doesn't need tanks. Mum Has a boiler so know different to traditional boiler.

hornetstinger · 9 Oct 2019 at 22:30

Yeah I know that. Maybe get prv fitted on toilet then

hornetstinger · 9 Oct 2019 at 22:32

Just a bit paranoid as I can home and cold tank filling in would not want that happen to toilet thousands in damages so want to make sure

hornetstinger · 10 Oct 2019 at 10:00

I don't have a thermostatic shower it's electric, with single pipe from airing cupboard to the shower.

And I dont give a hoot if morons here think it's bizarre it's my house not yours, but I guess you live in rented hovells so what do you care. if I can reduce chance flooding I will. So bugger off.