Pressure vessel

[MickyP10]

Hi

Got a leaking potable pressure vessel atop a Titan Flowmaster indirect system. Is it just a case of isolating the incoming mains, running hot taps to disperse water and pressure and unscrewing and replacing unit - and switching water back on. Was going to wrap half a dozen turns of PTFE tape around thread but don't know at this stage whether it's a taper thread or not.


http://media.diynot.com/30000_29537_28726_14970878_thumb.jpg

 

[moliver34]

if the cylinder is un vented, and Ive got a feeling it is. Then you should not be carrying out any repairs to it, "if" you do not have a G3 certificate for working on unvented hot water cylinders.

Call a competent plumber who can provide you with a ID card to prove he has a current G3 certificate.

It is against the law and building regulations to install or repair a unvented cylinder with out the correct qualifications.

 

[MickyP10]

Didn't know that - think the key is finding a competent plumber because the installation most certainly wasn't carried out by one! Have changed the CH pressure vessel. Is this one different?

 

[Onetap]

Is it just a case of isolating the incoming mains, running hot taps to disperse water and pressure and unscrewing and replacing unit - and switching water back on.

Be aware that a slight negative pressure, caused by isolating mains and turning on taps on a lower floor, can collapse or dent a cylinder very easily. Some have vacuum breaker valves fitted, others you need to let air into the HWS pipework. Check the manual.

 

[MickyP10]

Ah, okay. This is a bungalow, mind. Have ordered a new vessel and patched the pin-prick. But to do that, had to run the hot water to take the pressure down, because the sealant wouldn't take. Hard now, so will fill it up again.

 

[petit_pablo]

I do like that fact that the OP was told they needed an unvented qualified fitter to repair it yet carried on and did it anyway

 

[MickyP10]

Hi

There's history: I am unemployed, so have zero disposable income (minus zero, in fact) there is six inches of snow outside, Christmas approaches and there's a family of four here.

Had to replumb the whole heating system down from the loft last Christmas - took four months but I had nothing better to do - as I kept getting leaks under the screed - and, yes, the expert installer had used 15mm feeds, had bypassed the filling loop, and so on and so on. This in a two-year old privately-built property... I would have been over the moon if the regulatuions were adhered to then.

So, as long as there's no danger that I'm not aware of, I feel quite comfortable tackling this task.