Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Again it is the wording and is a bit of a grey area. Where have we heard that before?
G3 mainly states should terminate in safe, visible position where will not cause harm or damage. Just as a boiler PRV. Best practice would be into hopper etc if must terminate high level but I have let dozens go for being high level returned to wall and in my opinion as per regulations.
In absence of any clear, distinctive guidelines some guys will say yey others nay!
It does not state anywhere as far as am aware that MUST go into hopper etc at high level.
I did the re-assess last month and it wasn't mentioned in there at all as being appropriate. Yes you can choose another alternative to the approved documents recommendation but it will be on your head if someone is injured as a result. Nearly everything we learn or are told is not a regulation, but a standard to which we should work, the building regulations aren't at all specific.
Sometimes it's easier to stop fighting and go along with what your told, cover your arse and walk away knowing you've no come back.
Sometimes it's easier to stop fighting and go along with what your told, cover your arse and walk away knowing you've no come back.
T
TBServices
D
Dotty
Funnily enough I was testing the gas pipework today on an Andrews Ecoflo DFHWB which I'll be commissioning next week sometime, when I spotted the Logic course notes on top of the boiler.
And knock me down with a feather if the book didn't fall open on this page!
The important bit is what comes in the paragraph after you finished quoting above, it is as follows "However, persons intending to carry out building work should always check with their BCB, either the local authority or an Approved Inspector, that their proposals comply with Building Regulations."
So to summarize, if you follow the AD guidance then there is a presumption that what you have done will comply (very importance if you are self certifying). If you do not follow the guidance & choose to do it another way then you need to check with building control that all is OK!!! (not much point in a self cert then). High level discharge which is turned back against the wall is not given as an example of acceptable discharge arrangement under 3.62 & therefore would strongly suggest that if you are thinking of terminating like this that you consult your local BCB first.
When the new Part G come out in 2010 we were issued with the following information / guidance on this, to pass on to engineers. As there was now the provision to terminate the safety valve discharge to a plastic stack it was very unlikely that high level discharging against a wall would be allowed. I still have this somewhere but for the life of me can't find if I stumble across it I will post it.
Whether you self certify or not - and we self certify for loads of different sections of the B Regs because of the wide scope of work we do, we find that having developed a good relationship with our local BC department has been well worth while, often we make just a courtesy call - then they feel empowered to advise, which gives us a chance to discuss, and no problems later on.
Well you guys'll love this one... Had a discussion with Building Control today initially about D2 sizing and my calcs based on BS6700, at which point they said that I clearly knew more than they did, and that they were happy with what ever I wanted to do, discussion then got onto renewables, and I have now been asked to go and give the whole of the local BC department (3 District Councils) a talk on Renewables, our design and installation processes, and what to look out for 🙂
Their response email said "If we have any queries on renewables we now know who to call" 🙂 - That's what I call a good relationship with the BC department :sunny:
Their response email said "If we have any queries on renewables we now know who to call" 🙂 - That's what I call a good relationship with the BC department :sunny:
E
Ermintrude
I tried the same thing with my local BC at Christmas offered to go along FOC in-between then & new year, bearing in mind how little they seem to know about un-vented in our area.
Did not even get a reply, I suppose it is just easier to keep doing nothing !!! signing things off even if they are wrong, cos at the end of the day they are protected from any legal action themselves.
What water velocity do you use Mr Worcester never tried it using 6700 (or should I now say BS en 806-3)
I didn't offer, they asked and I accepted, and it's renewables I get to talk about 🙂
Worked it back from available head (300+5mm/m over 9m) = 345mm with a pipe bore of 20mm gives a velocity of 0.7m/s and flow of 0.22 l/s - or 13.2 l/min the pressure and temperature release valve have to pass a minimum of 8.33 l/min so 13.2 l/min so OK, (that's therefore what the BS/PartG is based on)
If you look at the head loss of the pipe at those flows, you'll see that it also equates to 345mm/9000mm = 0.038m/m or 0.376kPa/m which ties up with the head losses in the pipes at those flow rates - so 'squares the circle'
Then simply showed that the actual hydraulic gradient was better than that so it would easily cope with the flow, so to answer your question in simple terms. 0.7m/s
In effect what this allows you to do is to discount any vertical drops in the pipe from the pipe lengths mentioned in the regs, so long as you maintain the fall and 300mm minimum..
Hope that makes sense 🙂
Worked it back from available head (300+5mm/m over 9m) = 345mm with a pipe bore of 20mm gives a velocity of 0.7m/s and flow of 0.22 l/s - or 13.2 l/min the pressure and temperature release valve have to pass a minimum of 8.33 l/min so 13.2 l/min so OK, (that's therefore what the BS/PartG is based on)
If you look at the head loss of the pipe at those flows, you'll see that it also equates to 345mm/9000mm = 0.038m/m or 0.376kPa/m which ties up with the head losses in the pipes at those flow rates - so 'squares the circle'
Then simply showed that the actual hydraulic gradient was better than that so it would easily cope with the flow, so to answer your question in simple terms. 0.7m/s
In effect what this allows you to do is to discount any vertical drops in the pipe from the pipe lengths mentioned in the regs, so long as you maintain the fall and 300mm minimum..
Hope that makes sense 🙂
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