Primatic question

[krispy]

Hi.
I think the answer should be straightforward but can't find it on here by searching, so here goes.
I have a Primatic system, which works as it should.
I changed and moved radiators on the system 15 yrs ago with no problems, and now I want to make some more changes.
Being a competent DIY'er I can manage most things, but I can't for the life of me remember whether I had the use of the immersion heater hot water for the family's baths while I tinkered for a few days on the CH.
I suspect they just had to do without HW for a few days, I can't think of how it could be avoided, but am I correct?

 

[Ermintrude]

Cap rads off live?

 

[Simon F]

the radiators as you figured have water supplied from the primatic cylinder.
so no water or some capping required.
what changes are you making??
the system will only cope with a set volume in the heating circuit, go past that and the bubble in the cylinder will be lost as soon as the central heating warms up.

 

[Dickie]

Your Primatic HW cylinder should be drained completely when altering anything on your central heating system. I wouldnt recommend doing anything live if you're a DIYer.
They were never the best systems in the world & it maybe time to change it?

 

[Ermintrude]

Upgrade to a multi point water heater it's the future?

 

[jtsplumbing]

Now's the time to up-grade your cylinder ! then you will be-able to put a inhibitor into the system, as quoted if you are thinking of extending the system the cylinder may not take it .

 

[krispy]

Hi guys, thanks for your replies. I'm not extending the system, just hiding some pipes. Like I say, I've reasonable skills (touch wood). I guess the family will manage without HW for a day or two.