New Flue - water (rain) ingress

[StuSpiers]

Hi,

Had this boiler fitted within the last 6 months.

It is a Baxi boiler with hot water tank gravity system.

Boiler is fine however whenever it rains I get a small puddle of water underneath the boiler.

Under further investigation (by me) I think the rain must be getting in between the inner flue and flue sleeve (forgive terminology)

If this is correct is there any kind of end cap to fit said flue sleeve.

Regards.

 

[SafeGasInstall]

welcome to the forum , is your condense pipe connected to the rain water down pipe ?

 

[StuSpiers]

Thanks for the welcome

No, no where near any downpipes

Seems a bit of a crap design if there is no blanking grommet available.

Water simply runs down the upstanding flue and into the boiler.

 

[Rickster123]

Where does the condense waste pipe terminate?

 

[StuSpiers]

Is this pipe about 20mm plastic?

If so it goes down towards the washing machine waste pipe (not looked if it actually connects to said waste pipe)

It only leaks water when it rains.

 

[heliotrope]

Whatever you do, DO NOT block what you refer to as a flue sleeve.

It is not a sleeve but the air intake for your boiler. The bit going up the
wall is part of a plume management kit to help control the nuisance of
pluming in the wrong place.

You should get the installer back to check wheather this is the correct
kit and if it is fitted correctly.

 

[StuSpiers]

Whatever you do, DO NOT block what you refer to as a flue sleeve.

It is not a sleeve but the air intake for your boiler. The bit going up the
wall is part of a plume management kit to help control the nuisance of
pluming in the wrong place.

You should get the installer back to check wheather this is the correct
kit and if it is fitted correctly.

Nope not going to do anything, just after ammo for when the fitter comes back (again)

It was fitted by british gas, they said it required that ugly looking flue.
The original flue was just a straight through the wall job.

The fitter has been back once but failed to fix, said nothing was wrong.

The flue from the boiler is sloping up through the wall.

still seems a bad design they could have put an elbow on the sleeve so it went verticle then put a mushroom cap on it.

 

[mountainman]

Good old BG eh!
The flue is meant to run upwards, seems wierd but true.
Sounds like a condense drain problem to moi.

 

[SafeGasInstall]

Good old BG eh!
The flue is meant to run upwards, seems wierd but true.
Sounds like a condense drain problem to moi.

Same here !

 

[Rickster123]

Tell him to buy a burn barrier too! That's a real pet hate of mine.

 

[on heat]

got about 10 of these boilers on my patch doing this, its the fall on the flue. On a plume kit it should be straight no need for the flue to fall back to the boiler, its built into the plume kit

 

[GrahamM]

on heat is spot on.
Installers fall into the trap and install the concentric flue section with the fall back. This must be installed completely horizontal if using the plume kit.

Stuspiers- looking at your pics it appears the main section of flue going through wall to boiler is sloping back towards boiler. If this is case you need to have this rectified so main section is completely horizontal.

 

[dancinplumba]

Why does it have 2 obtuse bends on pmk ? Seems a waste imo

 

[diamondgas]

I thought Baxi had fitted a 'gather' plate under the air intake to 'catch' anything dripping inside? Has a tube that runs into the condensate trap yeh?

 

[dancinplumba]

Yea dg they do, perhaps it's an old stock boiler without one

 

[diamondgas]

Yea dg they do, perhaps it's an old stock boiler without one

Or it's been messed with and just needs sitting correctly? 🙂

 

[diamondgas]

Is the plume displacement kit a baxi one? .... Something looks a bit strange about it?

I don't install as much as many on here so am not sure!!!

 

[dancinplumba]

I thote that to DG so checked it out an it appears to be, according to mi's . Think installer has used 2 obtuse bends to take it back to wall cos flue thro wall is too long
imo

 

[diamondgas]

Check out page 24, fig 16. here http://www.baxi.co.uk/docs/Baxi_Platinum_Installation_Instructions2.pdf Only ever fitted one and it looked like the drawing fig 16... not what's on the ops picture???

By the way those who mentioned horizontal flueing please check out the same 🙂 Flue still needs to be angled according to mi's!

 

[heliotrope]

on heat is spot on.
Installers fall into the trap and install the concentric flue section with the fall back. This must be installed completely horizontal if using the plume kit.

Stuspiers- looking at your pics it appears the main section of flue going through wall to boiler is sloping back towards boiler. If this is case you need to have this rectified so main section is completely horizontal.

This is very interesting about flue not allowed to fall back to boiler when flue kit added to flue outlet.
It seems I have not kept up to date with the regulations and could now be in trouble.

In the last two months I have fitted two plume management kits to boiler flues (fitted correctly by
others) and have not altered the fall back to the boiler to make it horizontal as I did not know that
this was a requirement.

Where can I find this information?

 

[dancinplumba]

Mi's 🙂

 

[dancinplumba]

Check out page 24, fig 16. here http://www.baxi.co.uk/docs/Baxi_Platinum_Installation_Instructions2.pdf Only ever fitted one and it looked like the drawing fig 16... not what's on the ops picture???

By the way those who mentioned horizontal flueing please check out the same 🙂 Flue still needs to be angled according to mi's!

It's in solo mi's tho, I looked at platinum first tho. Also they now use M & G flues

 

[diamondgas]

It's in solo mi's tho, I looked at platinum first tho. Also they now use M & G flues

Didn't realise it was a solo DP, you're right 🙂 .... As said I don't install that much or get to see many new installs.... Does the solo come with the same said plastic water catchment plate? Because you will get water running back on the outside of the exhaust flue yeh?

 

[bright spark]

Going by the photos, the rain is entering through the section of flue that the fresh air is drawn in. Therefore it cannot go down the condense drain as it is not going into the heat exchanger, but down the fresh air inlet onto the boiler outside the combustion chamber inside the boiler casing and dripping out of the bottom. I think that is a flue kit for the new baxi solo HE. You should definitely have the installer back to run the flue a different way. Tell him what I said, I h
ave seen this happen before. Best of luck.

 

[diamondgas]

I'd like to detract the statment i made regarding the flue. Managed to download the mi's and as you stated it MUST be fitted horizontally .... Sorry for the duff info ... Still learning 🙂