pipe distance apart?

[AWheating]

I am on the same course in a college in my area, as the guys said above in the real world you never would be that specific as you would put the pipes where you could fit them within reason and add lagging when needed, normally on the 6129 its 100mm between pipes going by all the job specs on the course, what made you come up with 30mm just out of curiosity?

And for the clip spacings, yeah they are right, you just put them in places to make the job look neater but obviously you would not place them anywhere restricting for example putting a clip on the hot water pipe exactly where you need to do a passover.

30mm would be a good space as the min lagging required by regs inside a heated zone is now 13mm, so 30mm would allow for your lagging. Some 15mm double clips make it difficult to get 2x13mm lagging together. if you was running outside a heated zone then 25mm lagging would be required on 15mm pipe, so a gap of 50mm plus would be needed.