Regs for internal condensate pipe

[emergencyman]

At present Heatsave combi in bathroom with condensate with long run outside in 3/4".

Plan is to connect internally to existing 32mm waste from basin. Bottom of boiler is slightly lower than top of basin.

If I connected under floor boards using a tee and a bung to reduce to 3/4 I could run 3/4" about 6 foot and connect here.

Concern is that might not be to regs as if pipe from sink blocked outside then when basin emptied the boiler could fill up.

Would a T then 32mm to under boiler, HEPVO valve then bung o 3/4" be to regs? Any suggestions please?

 

[wattsie1987]

Yes with the addition of an air break. If the pipework backs up to the hepvo valve and the boiler keeps condensing it will still back the boiler up without one.

 

[emergencyman]

Thanks,

But with an air break (as in a tun dish?), if the basin waste did block outside condensate would then go onto the bathroom floor, causing a leak below?

I doubt it would ever lock up anyhow, just trying to keep BG happy? Is the air break essential?

 

[snowhead]

Concern is that might not be to regs as if pipe from sink blocked outside then when basin emptied the boiler could fill up.

?

You're over thinking this.

The same arguement would apply to any condensate or other waste directly connected to a waste stack downstairs in a house.

If the stack below the condensate blocked and someone emptied a bath the boiler could fill up with bath water and the sink and the washing machine and the dishwasher.

 

[AWheating]

hepvo valves instructions state its not suitable for boiler prv water i think.

 

[kirkgas]

hepvo valves instructions state its not suitable for boiler prv water i think.

Hepvo is suitable for unvented if fitted vertically, so I would have thought it ok for boiler, but would need to read up MI to confirm

 

[AWheating]

Hepvo is suitable for unvented if fitted vertically, so I would have thought it ok for boiler, but would need to read up MI to confirm

just done some flats to which we fitted hepvo's on the unvented, we were supprised to read they are not suitable for heating system water. first time we had notcied this on the MI, not sure if its a new statement or not.

seems strange which made us question the sense of it.

 

[tamz]

Maybe the kems fk up the insides?

 

[AWheating]

Maybe the kems fk up the insides?

im sure it mentioned temps, which was why we thought it strange when you think about a temp relief being ok.

 

[albatross]

Thanks,

But with an air break (as in a tun dish?),

DO NOT use a tundish for boiler condensate. If the boiler is off a while and syphon evaporates, or syphon is blown empty by explosive ignition, fumes will be entering the property, killing the customers and you will be having a holiday at Her Majesty's pleasure and a sore arris!!!

 

[albatross]

¾" Non-Return Valve | McAlpine Plumbing Products

use this

 

[emergencyman]

Thanks, so its straight out of the boiler in 3/4, through the above non return valve and into a tee under the floor?
No Tun dish or air break?

 

[TBServices]

Are you even gas safe?

 

[albatross]

I would. Keep air breaks for outside in case of freezing.

 

[albatross]

Are you even gas safe?

Good point, I overlooked that!

 

[snowhead]

Or preferably this as it's rated for condensate;

19/23mm In-Line Vertical Non-Return Valve - Condensate Fittings - Traps | McAlpine Plumbing Products

 

[emergencyman]

No, I'm not Gas safe.

 

[Rickster123]

No, I'm not Gas safe.

Brace yourself!..

 

[PlumbBobBob]

are you working under supervision of a gas safe engineer?

 

[Killy Bing]

Heatslave combi?

thats an oily guys

 

[Dotty]

At present Heatsave combi in bathroom with condensate with long run outside in 3/4".

Plan is to connect internally to existing 32mm waste from basin. Bottom of boiler is slightly lower than top of basin.

If I connected under floor boards using a tee and a bung to reduce to 3/4 I could run 3/4" about 6 foot and connect here.

Concern is that might not be to regs as if pipe from sink blocked outside then when basin emptied the boiler could fill up.

Would a T then 32mm to under boiler, HEPVO valve then bung o 3/4" be to regs? Any suggestions please?

Heatslave combi?

thats an oily guys

Something doesn't add up here.

EM can you please confirm it's an oil heatslave and tell us how it's mounted on a wall?

 

[Killy Bing]

Something doesn't add up here.

EM can you please confirm it's an oil heatslave and tell us how it's mounted on a wall?

Moneys on Some madman has put it mounted up in the airing cupboard.

i wish i could joke about that one.....

 

[emergencyman]

Ok, Here we go.

Are you trying to tell me that I need to be Gas safe to extend a condensate pipe?

For the record I was Corgi registered for over 10 years but packed in, wishing to focus on other areas of work. I have over 25 years experience, leaving Leeds CB in 1989.

Nowadays I employ a Gas safe engineer part time for any GAS jobs that come my way. " Why didn't you ask him" I her you say. I did, and like you guys on here I got a different answer. I thought I would ask on here to get a definite answer (still struggling, but thanks for all the replies).

 

[emergencyman]

Sorry for the mistake, its a heatLINE.

 

[Dotty]

Ok, Here we go.

Are you trying to tell me that I need to be Gas safe to extend a condensate pipe?

For the record I was Corgi registered for over 10 years but packed in, wishing to focus on other areas of work. I have over 25 years experience, leaving Leeds CB in 1989.

Nowadays I employ a Gas safe engineer part time for any GAS jobs that come my way. " Why didn't you ask him" I her you say. I did, and like you guys on here I got a different answer. I thought I would ask on here to get a definite answer (still struggling, but thanks for all the replies).

Theoretically if the trap fails then it forms part of the flue..........

 

[AWheating]

whats the MI say?

 

[Ermintrude]

No, I'm not Gas safe.

Oh no he didn't !

 

[emergencyman]

M I make no reference to a scenario where the boiler is lower than the basin.

I think (I stand to be corrected) that MI for Worcester Bosch state bottom of boiler soul be 100mm higher, this is what got me thinking.

 

[emergencyman]

Theoretically if the trap fails then it forms part of the flue..........

If your saying that you need to be GS to extend a condensate pipe then fair enough, but is the 3/4" overflow pipe classed as part of the flue?

 

[kirkgas]

My opinion is that the whole condensate run is part of the flue, but I can see the issue with a plumber complaint that he/she can fit a 4"x 1.25" branch better than "just" a gas engineer

 

[Dotty]

It's one of them grey areas and depends on the trap in use imho.

If the trap holds the seal all well and good, but should the trap seal fail......

 

[TBServices]

Condensate is part of the flue. Requires gas quals and reg.

 

[emergencyman]

Well I never knew that. It used to be the case that one had to interrupt the supply of gas. Do you have a link to an official document please?

Does it stop been part of the flue when it meets a bigger pipe? 32mm? 110mm?

 

[Whyme]

if there's waste pipes in the floor connect to one of those. hepvo's are fine for waste but not sure if condense would eat the rubber bit or what would happen with backing up waste also if that was put on to stop basin waste going into the boiler then if that happened the condense cant get out so it would have the same effect ( ie boiler filling up). under floor is best, keep it inside if poss. dont worry about the basin waste backing up.

 

[Reg Man]

As far as I am aware, anything after the condensate trap is a waste pipe not a gas fitting.