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Well if you prefer, why not go under with a battery drill and screw plastic stand off (wrap over) clips to the underside of each joist and use the plastic push fit stuff?
I personally don't like it but I am old fashioned and like you say, no-one will see it.

Apart from the next Plumber of course!

Have you sorted all your pipe sizing for the circuit?
 
It's a shame that I may end up using copper out of sight when I could run plastic instead.

It is a shame, but copper was out long before plastic, and see loads in lofts in the properties I work in, it’s all they used. You need to weigh up the difference, I’m sure there’s not much in it and you’ll be fitting copper - welcome to OldSkool 😀😀😀
 
Who remembers Hair felt? that used to be popular didn't it? For those who do not, it was highly flammable and very dusty/hairy to work with. You could come out looking like Chewbacca after an hour or two under there wrapping pipes with that.
I remember that stuff, caught some under a crawl space. Went up like a bonfire, first time I'd had to use an extinguisher on the job. Many spiders died that day 😀
 
I remember that stuff, caught some under a crawl space. Went up like a bonfire, first time I'd had to use an extinguisher on the job. Many spiders died that day 😀
Oh the panic!!! .....It happened to me. Never moved as fast I don't think.
 
Certainly gives the heart a good exercise.

Yes.
This is all bringing back memories. I had a mate who was under a floor and need to take a rest after crawling about so he hunched himself up onto his elbows and put his head up between the joists. As he leaned his head back to rest it on the side of the joist behind and it touched one of the old lead cables which was obviously leaking to earth. It gave him a fair crack and as his head flew forward his forehead hit a brad in the joist in front, lol...... Great days !
 
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I'm not one of those who are all copper and no plastic or vice versa. I just choose whatever is best for the job. Usually plastic wins based on price if it's going to be out of sight. Here plastic seemed ideal at first glance, going under the floor, but with all the pipe clipping, going down the copper route may save me time.

I'll have to run a gas pipe from one end of the house to another, so will be using copper under the floor anyway.

I didn't check joist depth as I didn't consider notching or drilling them.
 
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I was just wondering - combi boiler will be in the bathroom in one corner of the house and the kitchen in the opposite far, far corner. It will take ages for the hot water to reach the kitchen.

I don't think there's a way around this with a combi? The distance is what it is and there's no cylinder to run a return leg for the hot water.
 
Yes.
This is all bringing back memories. I had a mate who was under a floor and need to take a rest after crawling about so he hunched himself up onto his elbows and put his head up between the joists. As he leaned his head back to rest it on the side of the joist behind and it touched one of the old lead cables which was obviously leaking to earth. It gave him a fair crack and as his head flew forward his forehead hit a brad in the joist in front, lol.... Great days !
I'm laughing just imagining that. It's always funny when your colleagues hurt themsleves, some of my best laughs at work have been at the expense of others 😀
 
I was just wondering - combi boiler will be in the bathroom in one corner of the house and the kitchen in the opposite far, far corner. It will take ages for the hot water to reach the kitchen.

I don't think there's a way around this with a combi? The distance is what it is and there's no cylinder to run a return leg for the hot water.
Use the shortest route possible beneath the floor in 15mm and lagg it well. You probably thought that anyway?
That's all you can do really. Try it, you might be surprised how well it works.
 
Yes.
This is all bringing back memories. I had a mate who was under a floor and need to take a rest after crawling about so he hunched himself up onto his elbows and put his head up between the joists. As he leaned his head back to rest it on the side of the joist behind and it touched one of the old lead cables which was obviously leaking to earth. It gave him a fair crack and as his head flew forward his forehead hit a brad in the joist in front, lol.... Great days !

I bet that never made the accident book 😉
 
Yes, I'll use the shortest route of course, saves me on piping too.
But I was briefly considering running the pipe in 22mm due to the distance. however, the initial pressure and flow rate at the meter is very high, so losses will be acceptable. And a 22mm pipe I realise now will have too much cold water sitting in it. Maybe run it in 8 mm 🙂.
 
Yes, I'll use the shortest route of course, saves me on piping too.
But I was briefly considering running the pipe in 22mm due to the distance. however, the initial pressure and flow rate at the meter is very high, so losses will be acceptable. And a 22mm pipe I realise now will have too much cold water sitting in it. Maybe run it in 8 mm 🙂.
I would stick to 15mm personally.
 
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Yes, I'll use the shortest route of course, saves me on piping too.
But I was briefly considering running the pipe in 22mm due to the distance. however, the initial pressure and flow rate at the meter is very high, so losses will be acceptable. And a 22mm pipe I realise now will have too much cold water sitting in it. Maybe run it in 8 mm 🙂.

Most are ran in 15mm, just go with the MI’s.
 
I agree with 15mm. There'll be just one hot water pipe in the kitchen anyway.
 

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