Does it matter where the cold water entry point is?

[Zeddd]

Hello

I currently have a lead pipe for my cold drinking water. I wish I changed it when I renovated my house but I just wasn’t thinking. Kitchen is all done up now, and the pipe currently enters directly below sink. It would be difficult to change the pipe from there now.

The boiler is in the garage. And this of course has cold water going into it. The pipe going into the boiler is very accessible.

My question is therefore, can I cut and isolate the existing water inlet pipe. Then tap the pipe going into the boiler. Branch off it, and connect my new MDPE pipe to that. Effectively making the water incoming pipe closest to the boiler.

Rough sketch attached. Yellow arrow is my current incoming pipe. Dots are sinks, toilets, outdoor tap etc.

If I cut the pipe where red line and put a stop end. Then tap the pipe where it’s green with my incoming mdpe pipe.

Will this work?

Thanks!

 

[CountryFan]

You can’t create a dead leg in the system, which is what you’d be doing cutting off and adding a stop end. What you need to consider is getting water to all the outlets and changing the direction of flow direction. It might be feasible to change at the kitchen sink, but depends on accessibility and what the sub-base is made from.

 

[Zeddd]

I see! I guess it’s to make sure the water at the dead leg is flowing about?

What if it’s cut closer to that 1st tap? As per this attached image?

 

[denso13]

Seemingly the best place for a stop valve nowadays is hidden below a door mat

Only kidding, never mind...

 

[CountryFan]

I see! I guess it’s to make sure the water at the dead leg is flowing about?

What if it’s cut closer to that 1st tap? As per this attached image?

Nope. Either utilise the lead, eg a garden tap or needs to be cut back to no more than twice the diameter of the pipe or removed completely (preferred)

 

[oldbuffer]

If you live in a hard water area, I wouldn't be bothered about the lead pipe from a health perspective.

 

[jj4091]

Nope. Either utilise the lead, eg a garden tap or needs to be cut back to no more than twice the diameter of the pipe or removed completely (preferred)

Does that apply to gas pipes as well ,as I often see unused capped off pipes that have not been removed at the supply end and worry about the safety of them being left like that

 

[denso13]

Does that apply to gas pipes as well ,as I often see unused capped off pipes that have not been removed at the supply end and worry about the safety of them being left like that

No, just water, it's to do with contamination.

 

[Zeddd]

Nope. Either utilise the lead, eg a garden tap or needs to be cut back to no more than twice the diameter of the pipe or removed completely (preferred)

Actually the lead starts before my diagram here. It chnages from lead to copper then to my stop tap which is directly beneath that first circle shown.

So if I cut it off just below the but feeding the first circle. The dead leg section will be very small. Maybe 1-2cm.

The new incoming pip will be where the green mark is and will have a stopcock there.

Does that sound feasible?

 

[CountryFan]

Are you putting a whole new feed in or just extending/altering existing?

 

[Zeddd]

I will be hopefully be replacing the lead from the street ( ST water to do the connection on road side) to my home in mdpe.

But old lead goes under my garage and into my kitchen.

I want to instead take the incoming supply into my garage and attach to the copper cold pipe there instead (with a stop cock etc) and effective cut off the connection from the old lead. I’d just leave it in the ground..