PRV piping.

[Notmynormaljob]

Hi all, first post.
I'm electrical by trade but not too bad on the plumbing side. I did do a bit if a search but didn't see the answer.
So the story is that I'm having a boiler fitted to my mums house and as per what I've seen here, I can work on the water side of the system but not the appliance side and Im happy with that.
The boiler will be going upstairs and will not be attached to an external wall.
My question is regarding this, and I'll link to a pic so you know EXACTLY what I'm talking about as there seems to be a lot of nuance in terminology.
https://www.alamy.com/stock-photo-boiler-pressure-overflow-pipe-england-uk-38032742.html
That pipe, is there a max length that pipe can be from the boiler before it exits the building, (just going to measure but I'm thinking my requirements are 2-3m)? To add more detail, I'll make sure that it is;

• Copper all the way.
• 15mm diameter.
• No more than 2 internal bends.
• Will be facing downward or be on a decline for its entire length.

Thanks guys, (and girls).

 

[terryplumb]

Before you do anything you should discuss the boilers positioning with the GSR engineer who has agreed to fit the boiler to any pipework that you do.

 

[Notmynormaljob]

Before you do anything you should discuss the boilers positioning with the GSR engineer who has agreed to fit the boiler to any pipework that you do.

Hi TerryPlumb thanks, already have. Just making sure all is above board and getting a second opinion. Trying to get an idea of the disruption involved. I don't want him taking up the floor boards etc when I can do it. Haven't met a tradesman yet that cares about the right way to do that and it's the reason I do as much as possible myself.
Also the number of times I've had/seen a tradesman drill from the inside and blow the brickwork is another reason I 'get involved'.

 

[terryplumb]

Tradesmen who don't care about how they take up floorboards ,how very dare you make those accusations .
By the way pressure relief pipework in 15 mm copper is correct etc.

 

[Notmynormaljob]

Tradesmen who don't care about how they take up floorboards ,how very dare you make those accusations .
By the way pressure relief pipework in 15 mm copper is correct etc.

lol, I don't have too much experience with people on the gas side as it's not something I do regularly but in my line of work I come across sparkies that make my gears grind.
I think in the time I've been in my profession, (20 years), I've only come across two that actually use a No2. pozidrive screwdriver on a No.2 pozidrive screw head. The most common thing these days is for them to use a No.2 Philips in an impact driver!!!! On a distribution board!!!

I have to look the other way.

 

[terryplumb]

Impact driver ? Is that the thing with a claw for bashing nails in with ,and tends to split the end of the floorboard ??

 

[Notmynormaljob]

Impact driver ? Is that the thing with a claw for bashing nails in with ,and tends to split the end of the floorboard ??

lol, so you see my problem.