Urgent unvented hot water cylinder help needed.

[Scottwood75]

I was called by a friend to have a look at his unvented cylinder. The tprv was discharging into the tundish so I went to have a look, found it like this.

I know there are a few serious errors and would like someone to help identify them all to confront the installer.

The D2 pipework is defiantly wrong and terminates by going through the brick wall into thin air, on a 3rd floor flat. also its plastic overflow pipe.

Comments and thoughts please.

 

[Toddyplumb]

I dont know why they banned swearing on this site as its so frustrating answering these posts without !!!!!!!!
Turn it off, phone building control in the morning and report it to them! In fact phone the HSE and tell them

 

[Scottwood75]

I did, its off and il advise him to contact the hse and report the plumber. thanks for confirming what I suspected.

 

[oldplumber]

If I hadnt seen it I wouldnt believe it, allI can think is its a diy nightmare Im embarassed to be working in the same industry as the numpty who threw that together.

 

[PlumbBobBob]

that is really really bad and highly dangerous as you already know the "plumber" who did that should be strung up by the short and curlies.

 

[Scottwood75]

Thanks everyone, IF possible can you list the faults for me as we are compling a list. So far I have these:

Regarding the set up of your unvented hotwater cylinder, I believe the following faults are present

1: Combined temperature and pressure relief valve: Damaged, possible that it is stuck open which is why the water is discharging. Supposed to be able to twist to make sure it operates but also falls correctly back onto the seating.

Tundish: Should have only D1 pipework in the top and D2 in the bottom, no pipework from the side. Expansion valve pipework should be tee’d into D1

D1 Pipework: must be within 500 mm from the tprv to the tundish

D2 Pipework: MUST be metal and capable of withstanding the temperature of the discharged water (90-95 degrees centigrade). This pipe is plastic overflow pipe.

Must terminate in a safe place where there is no risk to persons in the vicinity, eg this one discharges out of the wall onto the ground below, for example a child may see the falling water and run under it.

D2 pipework MUST be at least one size larger then the outlet size of the tprv

D1 discharge is 15mm, D2 should be 22mm minimum and metal

D2 must fall vertically after tundish for a minimum of 300mm before any elbows or bends

D2 must have a continuous fall to facilitate removal of the discharge water

Combination valve: No balanced cold water supply: means that shower, basin and bath cold is mains pressure instead of having a point after the combination valve to supply it to the shower bath and basin at the same pressure as the hot.

Also just to clarify, I passed my unvented hot water with NICEIC, but it was back in March and have never touched it since, SO I may be a little rusty.

 

[fuzzy]

blimey, call the police!!lol

 

[PlumbBobBob]

i think that covers just about everything, but if the D1/D2 is wrong i'll bet you a pound to a penny that there are more things wrong with this installation.

 

[Toddyplumb]

Thats the thing Steve, what else is wrong !

 

[shorticus]

is that IV on the hws? That's a big no no!

Oh and petty I know but the pipes should be lagged

 

[tamz]

He can use a pipebender. That is all wrong for the standard of installation.
Musta been some kind of plumber who made a c..k up of it all and is a disgrace to the trade.

 

[StuF215]

Thats dangerous
Does the cylinder have an internal expansion gap? If it doesnt then I can't see an expansion vessel!

He could have used pipe clip or two

 

[hihowudoin]

Thankfully this brand/model of cylinder has built in expansion vessel.
Just another point, the drain off has been fitted to the balanced cold water supply connection, therefore not going to drain alot anyway
:-D

 

[mikeb59]

Ye gods wot a nitemare, glad i took my unvented ticket now, wots the odds the PLumber, yea rite didnt read the installation instuctions,

 

[SafeGasInstall]

he can use the pipe bender ,but can not use the hammer drill to put 20 clips ,

shocking install, just makes me wonder what has he done for the rest of the day after finish

this install by 10am !!!

 

[Barry98]

got to be one the governments special super dooper fast trackers

 

[SafeGasInstall]

just noticed prv from combi valve is just sitting on the dish space

 

[unguided1]

I am extremly impressed with the lever valve on the hot water outlet, how lethal is that???
I see loads of installs where the D1 and D2 pipes are installed incorrectly, but I can honestly say I have never seen one this bad

 

[SafeGasInstall]

just looking at the pictures again I wish I can use the pipe bender that good .....

 

[gavinwilson]

does the installer have to put their details/name on the sheet ? also can u run the tundish off into a sink? only asking as im a trainee and like to know the rightway of doing things thnx