primatic system disconnecting/isolating

[jono67]

Hi, i have a primatic cylinder system which i will be replacing soon, in the mean time is it possible to disconnect the f & r from/to the boiler and leave the cold water supply to the cylinder from the header so it can be used to supply DHW only by using the electrical immersion?
This will be a temporary measure for a week or 2.
Many thanks in advance.
Jon

 

[lame plumber]

just means you'll have too drain right down cap off F n R at boiler and refill, if your ripping the lot out probably best to grab the bull by the horns and crack on getting it all out, as inevitably a bit of movement on pipes will cause a leak on the cyl and hassle follows.

 

[jono67]

Thanks for reply.
Yes will be rip it all out, just wanted to have use of DH from the cylinder while I crack on with the rest of the ripping out.
Also wanted to clarify that the air bubble in the primatic cylinder would be maintain after the CH system is drained? Not sure if this will be a problem as there will be no CH water as such to mix with DHW.....

 

[Simon F]

yes you can do what are asking, don't worry about the bubble or heating side as you are cutting that out.
just be ready as explained earlier, the cylinder seal at the bottom is probably ready to leak as soon as you start working around the cylinder..:boat:
you will likely get a bit of churned up rusty water coming out your hot tap initially, this will calm down.
are you getting a new cylinder? why not do that as the first job?

 

[jono67]

Thanks for your help.
Getting a combi fitted, just wanted to get a bit of the ripping out work done before the gas fitter comes to install the combi. So in the mean time have the use of hot water from the cylinder.
Sounds pretty straight forward, I'll watch out for leaky seal though. Much appreciated.