Placement of TRV in domestic cylinder

[Twinhawk]

Quick question...leak in old CWSC cant fit new one up ..so pressurised .. where do i fit TRV could i alter a surry flange and install there? or is there a standard way?

 

[tipintim]

Dont make sense mate
cwsc cold water storage c
presurised
trv on sury flange

what are you trying to do, post picture

 

[PlumbBobBob]

also confused although doesn't take much lol.

 

[Twinhawk]

Right Prevously a tank, totally froze and split from connections outward, on pressurised (unfinished pic) mains going to 1.5bar prv, teed to cold, Check valve, teed of expansion vessel and 3bar blow off then to feed hot water cylinder. still need to fit temperature relief valve,

 

[Resolute]

I read TRV as Thermostatic Rad Valve!

 

[Twinhawk]

OO sorry just used to my own shorthand...

 

[tipintim]

OK . Im getting the picture.
What is your specific question. No abreviations please

 

[Twinhawk]

Where do a fit the temperature relief valve on the hot water cylinder, as there is not one or connections because willis immersion installed

 

[PlumbBobBob]

presumably this is on heating side not hot water side?

 

[Twinhawk]

no, its on the hot water, im just being carefull because a fella i used to work with blew up 3 and imploded 1

 

[tipintim]

That doesnt look right
You fit the presure relief off the expansion
List the pipes
what is that 1" telescope
what boiler have you got
post pictures of cylinder, can it be presurised

 

[tipintim]

Is this just a domestic cylinder or a heating system
i.e emersion or a boiler

 

[Twinhawk]

pressure relief valve is off the expansion, pressure relief and expansion can be fitted anywhere, think you are referring to the old overflow,
drawing attached

 

[PlumbBobBob]

is what you are doing trying to convert vented hot water to unvented pressurised? if so you must have your unvented ticket.

 

[Twinhawk]

Is this just a domestic cylinder or a heating system
i.e emersion or a boiler

aye just a domestic cylinder oil fired boiler, fairly well installed system, shame bout temperature, destroyed whole house

 

[PlumbBobBob]

also you cannot use a vented cylinder in this situation as it is not constructed to hold such pressures and will split at the very least as your friend has already discovered.

 

[tipintim]

Sorry bud, but your on the road like your ex boss, that blew up and inploded.

Can you post picture of cylinder

 

[Twinhawk]

well its been pressurized and held at 1.5 bar....no other safety devices to prevent this?

 

[tipintim]

Dont want to be rude, but are you competant.
You ask for advice yet dismiss it. Some systems are not fit for others.
Steveb gave you some good advice.

 

[Puddle]

..no other safety devices to prevent this?

yes,imprisonment !

and large fines !


imho

 

[Twinhawk]

no...im at home now,,,its just a normal cylinder...havent priced for a megalflow.....thinking

 

[Twinhawk]

away for a drink...to ponder, i think my dad has a few megaflows somewhere im not getting a tank up there im a 28 waist and i can just get in the roof space ffs

 

[tipintim]

Calm down now. We here to help.
Take a photo of cylinder.

 

[Billy Bob Bob]

think op may just be trying to pressurise ch side cylinder coil? if he,s on about pressuriseing a normal vented cylinder,bomb waiting to go off

 

[Twinhawk]

Ill get a picture and as far s competance goes.....back to black iron for me...certificates mean **** still learning

 

[tipintim]

Twinhawk
IM not beating up on you but concerned. Let people help you.
The tank you show looks like a 25 ltr ?
That cant be feeding a cylinder?

 

[Twinhawk]

no the f+e is above it, its all systems where gravity, pipe burst everywhere and that 250+tank froze, also ive had it presurised (1.4 bar on the button area is around 4 bar fills a kitchen sink in about a minute with the plug out its sickening) and running already, turned water of and opened taps when i left, 28mm to hot water cylinder you can see cut in bottom left and just past 22mm to cold taps in bathroom...

 

[Blackcatgas]

think op may just be trying to pressurise ch side cylinder coil? if he,s on about pressuriseing a normal vented cylinder,bomb waiting to go off

Looking at his sketchs hes going to pressurise a vented cylinder.
Twinhawk ,dont do it. at the very least it will split, at the worst there is enough power in the resulting explosion to pull down the side of your house.
Use a coffin type water tank to replace the split one in the loft that will slide through your loft hatch.

 

[Billy Bob Bob]

right,could not work out his sketches thanks BCG,as said to the op dont do it buddy,death or serious injury to yourself or family awaits

 

[andrewcplatt]

Get somebody in who knows what he is doing boet!

 

[Twinhawk]

Right lads thanks for all your help ... I efft up ...bit the bullet rip it out might break even if I'm lucky

 

[tipintim]

Now you show compentacy, good on you
If ever in dought, search for the answer.
There cant be one guy on here that knows it all. We all are learning

 

[PlumbBobBob]

i'm glad you've seen the light. seriously though we weren't getting at you just trying to get you to see where you were going wrong before it was too late. good luck for the future as tipintim said we are all learning all the time.

 

[Twinhawk]

Well I was curious myself about it but I was told by a fella just remenber the pressure reducing valve and you'll be fine...he told me to pressurized it....then I realised he's a w...nker so I asked you reload really thanks calming down now what's 200 quid lost at the end if the day just glad their boilers goosed..sounds awful but its gona keep me outta the red

 

[tipintim]

On chin.
Move on, learn lesson
if you charged to 1.5.... when it heats up.... 2.5......cylinder would not take it

 

[Twinhawk]

right ...on another note....i've got some fitting i need to use, fixed a heating system this week main flow and return split outside, replaced, airlocked so to fix i temporarily pressurised because there was no drain on boiler to force it out and every radiator was roasting, when i let pressure off and connected to header f+e the radiators piped in living room in 10mm went cool, if i pressurise CORRECTLY will this resume adequate heating to these rads?

 

[Blackcatgas]

right ...on another note....i've got some fitting i need to use, fixed a heating system this week main flow and return split outside, replaced, airlocked so to fix i temporarily pressurised because there was no drain on boiler to force it out and every radiator was roasting, when i let pressure off and connected to header f+e the radiators piped in living room in 10mm went cool, if i pressurise CORRECTLY will this resume adequate heating to these rads?

No try shutting off the upstairs rads to force it round the ones that arent working downstairs., whats your fascination with pressurising things lol!?.If the heating was working fine before on a tank then leave it on a tank, alot of boilers are not suitable for a sealed system ,they can overheat.

 

[Twinhawk]

the girl has been having problems with the radiator for years now, so far i turned the hotter rads down slightly, and cracked the nuts into bucket to try and get flow, no change, burner is a riello rdb with warmflow boiler, has been regularly serviced with only 2 jets changed in near 4 years, very quick to heat rest of house, the two rads that arent heating seem to be the only two in microbore.

 

[Twinhawk]

and i dont have a facination with pressurising things, was working at a boiler last week, didnt pressurise that....it already was.....black iron man tbh

 

[PlumbBobBob]

as they are on microbore and not working i would suspect gunk in the system to be honest.

 

[Bartdude]

It certainly sounds like a pipework blockage in the microbore,it's also very easy to kink that stuff too.

Regarding the cylinder question,there's a wider point to be made about pressurised systems I think. There's no doubt that they are very effective and it's made installation a lot easier and quicker generally,but it's essential that installers understand the operating principles and WHY they can be so dangerous. There are still bags of open vented systems and I wonder how many are being changed to sealed just because of lack of knowledge?

Twinhawk,glad you saw the light on this one,a good lesson learnt I guess.The guy who told you to pressurise the cylinder is a *******,don't take advice from him in the future. This is why it can be so dangerous.

http://www.youtube.com/watch?v=GF_Wrm-Ns0I

YouTube - exploding hot water cylinder myth busters

 

[Twinhawk]

so basically get a big bucket at rad and let her flow into it, im sure main lines r clear was gushing out for days

 

[plumberdarren]

No disrespect but find it amazing that people arent educated to be able to know the severity of these things, If i was you twinhawk id look at going on a few day courses if i were you, there are unvented and water regs 1 day courses that will give you alot of knowledge and off course certificates, theses are fairly cheap and last for 5 years generally.
Please dont take the wrong way but if going into peoples houses you need to have the knowledge on these things before someones house is destroyed or worse serious injury is incurred.

All the best

 

[Twinhawk]

none taken, i served five years on industrial sites, the differences are plenty however the qualification for working not. i was taught it all in school, on paper, i know the regs but at no stage was i told hot water cylinder standards, same with burners, all on paper, but getting the hang of them now.

 

[plumberdarren]

Glad you havent taken offence, as i said most construction colleges do these 1day courses and well worth it , the certification is also nationally recognized. example below
Unvented Hot Water Training, Unvented Hot Water Training Course, nvented Hot Water Training Courses

 

[plumberdarren]

Even better heres one in belfast

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