My self-build DIY plumbing

[Thorfun]

26 minutes ago, TonyT said:

I would use whatever thickness is suitable for the clips you plan to install so you can get the maximum insulation without making the installation ridiculously difficult.

 

I would use climaflex inside.

Was going to use these clips. 
 

https://www.screwfix.com/p/talon-15mm-hinge-clip-white-100-pack/19684
 

so will pick some up and measure 

[Thorfun]

2 minutes ago, Nickfromwales said:

100%. 
I am now fully committed to using local PIR’s to activate the HRC pump. I also use the same PIR’s ( via a luxury sensor ) to trigger Pee lighting after sundown ( dusk to dawn ). Two birds one stone.
Top of the kitchen plinth is where I install a stealthy sub-miniature PIR for HRC at the kitchen, with the sensor about the size of a £1 coin. 

Loxone will have that covered for me. 😊

[Nickfromwales]

25 minutes ago, TonyT said:

I would use whatever thickness is suitable for the clips you plan to install so you can get the maximum insulation without making the installation ridiculously difficult.

 

I would use climaflex inside.

I don’t use clips, I use all round band, black powder coated. For the HRC I use 25mm wall 22mm bore Climaflex and then a 50mm waste clip works perfectly.

[Nickfromwales]

2 minutes ago, Thorfun said:

Was going to use these clips. 
 

https://www.screwfix.com/p/talon-15mm-hinge-clip-white-100-pack/19684
 

so will pick some up and measure 

For any I insulated pipes yes, if using on insulated pipes you’ll need Talon clips plus Talon spacers or the pipe won’t be far enough from the mounting surface to allow for the insulation. 

[Thorfun]

36 minutes ago, Nickfromwales said:

I don’t use clips, I use all round band, black powder coated. For the HRC I use 25mm wall 22mm bore Climaflex and then a 50mm waste clip works perfectly.

is that so you don't have to cut the insulation around the clips? you can insulate the pipe and then strap band it to the wall?

[Pocster]

2 hours ago, Thorfun said:

I'm kind of thinking of taking the 'better safe than sorry' approach to my DIY plumbing!

Ffs . I asked about lagging and everyone said yes for the hot especially if it’s a long run . For the small cost lag all hots . THERE ! I am right !

[joe90]

11 minutes ago, pocster said:

I asked about lagging and everyone said yes

No I didn’t 🖕

[Thorfun]

11 minutes ago, pocster said:

Ffs . I asked about lagging and everyone said yes for the hot especially if it’s a long run . For the small cost lag all hots . THERE ! I am right !

what size insulation did you use? 9mm/13mm/25mm/something else? and did you use Climaflex as well?

[Pocster]

6 minutes ago, Thorfun said:

what size insulation did you use? 9mm/13mm/25mm/something else? and did you use Climaflex as well?

9mm and Climafkex . The heat loss even over 20m is low but I still think worth it .

[Onoff]

25 minutes ago, pocster said:

Ffs . I asked about lagging and everyone said yes for the hot especially if it’s a long run . For the small cost lag all hots . THERE ! I am right !

 

They should listen and stop slagging you off all the time.

[Pocster]

19 minutes ago, Onoff said:

 

They should listen and stop slagging you off all the time.

I know . I’m a qualified plumb (h) er and no one listens .

[Nickfromwales]

42 minutes ago, pocster said:

Ffs . I asked about lagging and everyone said yes for the hot especially if it’s a long run . For the small cost lag all hots . THERE ! I am right !

You know too much, so we build in some insurance with your project

[Nickfromwales]

3 hours ago, Thorfun said:

is that so you don't have to cut the insulation around the clips? you can insulate the pipe and then strap band it to the wall?

Yup. Not life or death, but every little helps. 

[Thorfun]

so I finished the internal 110mm soil pipes (mostly anyway, still go the en-suite above the garage to do). here's the 3rd run. starting in an en-suite

 

 

down to the downstairs WC

 

 

in to the basement where the rest bend takes it on the horizontal and I have a rodding point

 

 

across a hallway

 

 

to join up with the other 2 runs and out the basement wall

 

 

all look ok?

[Thorfun]

then I pressure tested the whole system (already did each run individually and was all ok so wasn't expecting any issues) and it passed with flying colours.

 

before:

 

after 5 mins:

 

 

testing at the manhole outside

 

 

with all ok I fitted the AAVs on 2 of the stacks

 

 

anyone notice any issues?

[TonyT]

5 hours ago, Nickfromwales said:

I don’t use clips, I use all round band, black powder coated. For the HRC I use 25mm wall 22mm bore Climaflex and then a 50mm waste clip works perfectly.

Yes I use the same, but didn’t want to complicate it…👌

[Thorfun]

5 minutes ago, TonyT said:

Yes I use the same, but didn’t want to complicate it…👌

I have plenty of the stuff! bought 20m of it previously so could easily use it instead of clips. but, don't clips hold pipe vertical as well as stopping it falling away from the wall, so how does the strap band do this? 

[TonyT]

You wrap it around the pipe and put a single screw through both ‘ends’ of the all round band/bow band.

[Thorfun]

1 hour ago, TonyT said:

You wrap it around the pipe and put a single screw through both ‘ends’ of the all round band/bow band.

Thanks for the explanation. I’ll give it a trial when I can and take a photo to ask if I’ve done it how I understand it

[Thorfun]

On 22/10/2022 at 09:15, Nickfromwales said:

I only consider condensation on the cold ( far worse in winter ) an issue, so insulate the cold runs if I think there’s going to be any chance of a problem.

For the cost, it’s something I’d go for tbh. 
On the hot runs, waste of time afaic, unless you’re running an HRC. 

hey, @Nickfromwales. can you please explain to me why you need to insulate an HRC but not a normal hot pipe? surely the point of an HRC is to replace the cool water with hot water when the hot tap is needed. so, assuming you have some form of occupation sensor and someone isn't spending 20 minutes on the loo then would the HRC/hot pipe really lose that much heat during the period of occupancy? or is there another specific reason for the lagging of the HRC/hot pipe combo?

[Russell griffiths]

Don’t forget to strap the life out of that rest bend. 

[Thorfun]

57 minutes ago, Russell griffiths said:

Don’t forget to strap the life out of that rest bend. 

so what's there now isn't sufficient?

[Thorfun]

back to the plumbing manifolds. this is the design I've come up with. as there were no previous comments on the last design drawings I figured there weren't any major issues.

 

it's a LOT of pipe!

 

 

here's a photo of my plant room and where I was thinking of putting each manifold and the UVC.

 

 

was going to put the hot manifolds against the wall and the cold ones sitting in front proud of the wall to save a bit of space (not that space is short in the plant room but I quite like the efficiency of the staggered manifolds like in this photo of someone else's setup taken from a thread on here.

 

 

I have read many discussions on here about the size of pipe and have decided for simplicity to simply run 15mm everywhere and the HRC in 10mm. I know I could do the basins in 10mm but if I'm running an HRC to them then that will clear the dead leg and so I can use the 15mm without worrying about that side of it.

 

anyone got any comments/suggestions/criticisms/plaudits before I purchase the plethora of manifolds and start running pipework!

 

 

[Pocster]

40 minutes ago, Thorfun said:

back to the plumbing manifolds. this is the design I've come up with. as there were no previous comments on the last design drawings I figured there weren't any major issues.

 

it's a LOT of pipe!

 

 

here's a photo of my plant room and where I was thinking of putting each manifold and the UVC.

 

 

was going to put the hot manifolds against the wall and the cold ones sitting in front proud of the wall to save a bit of space (not that space is short in the plant room but I quite like the efficiency of the staggered manifolds like in this photo of someone else's setup taken from a thread on here.

 

 

I have read many discussions on here about the size of pipe and have decided for simplicity to simply run 15mm everywhere and the HRC in 10mm. I know I could do the basins in 10mm but if I'm running an HRC to them then that will clear the dead leg and so I can use the 15mm without worrying about that side of it.

 

anyone got any comments/suggestions/criticisms/plaudits before I purchase the plethora of manifolds and start running pipework!

 

 

15mm everywhere . That’s means you purchase one lot of pipe and fittings . Easier if it’s all one size and (expletive deleted) anyone else who says different. I’ve built an entire house on 15mm ( as advised on this forum ) so why change . 
THERE ! I’m right again .

[Nickfromwales]

On 22/10/2022 at 16:53, Thorfun said:

anyone notice any issues?

Of course. Us professionals cannot possibly allow you, as a newbie, to get this right first time now can we?! 
So;

 

 

OK.

The rest bend will eventually fall off. Do as Bruce says above, and clamp that well. The shoe on the bend is supposed to be where the thud gets arrested, but that’ll be off before you know it