LOW LOSS HEADER, a guide to when, where and how on the installation of a low loss header.

Derek continues his inside the boiler casing video with the installation of a new boiler and low loss header to replace the old glow-worm micron.

[martynlewis]

I watched another YT plumbing channel trying to describe the principle of a low loss header, but HOLD TIGHT! This is a better video. Thanks.

[stuartparks]

Thank you, Derik, for another great video clears up a lot of questions 👍

[nemanjagradinac]

No there literally isn't any better videos out there explaining this in as much detail. Brilliant information. Cheers mate

[michaelrose]

Hi Derek
Just passed my first ACS today massive thanks to you for taking the time and effort with your videos that have been crucial to me passing.

[chohanchohan]

Omg I always wanted to know where and how to use these...BIG THANKS Del

[allandewar]

Great vid mate . Love your enthusiasm and your knowledge is very much appreciated

[martynjukes]

Been fitting these for years commercially but like most pipe fitters I have never really broke down the mechanics of them. Thanks for breaking this down mate.

[mjnid]

I was once shadowing and there was a low loss header being installed but to be honest I didn’t have a clue as to why it was installed. Lol. Now having watched this video it makes more sense. Very informative and what seems to be complex at first you have made it easy to understand with your explanations and drawings. When you mentioned about the filling loop not being installed correctly, sorry, I didn’t notice what was wrong..?? Thanks Derek 👍🏻.

Asian Jon. Training.

[saidhissoufi]

Always delivering with passion. Well done

[Skeletoncrewand]

Nicely explained and simplified. Some videos on the youtube can make them seem more complicated than they really need to be.

[nickadams]

Nice video Derek very well explained as usual 👍

[anonymous.youtuber]

Nice how you explain this in a way it can be understood. 👍

[faridratni]

Please Tom in a low loss heaser where do you connect a sensor colector and is it important to use it Thanks

[paulrossiter]

Brilliant fool proof learning about how a LLH works. You nail it to the wall in layman’s terms 👏👏👏👏👏

Very interesting ...thankyou 👍

[peterbeck]

Love this one you have made it make sense Derek. Always learning, you know your stuff keep up the great vids.

[eddiestafford]

Great information....well presented...thank you!!

[KrisFarquharPlumbingnHeating]

Hi Derek, been watching your videos and your really good at explaining the methods in all aspects of your teaching, keep up the good work, mondays and wednesdays so lets got on with it, brilliant Derek,

[bluenapalm]

Great vid thanks.

I've 2x 30kW gas boilers
LLH
4 zones - each with circulation pump and zone valves

I'm researching as to why when two zones are running, that the system pressure hits 3 bars and PRV (if that's correct name) lets off water outside. System starts cold at 1 bar.

Expansion vessel still has air coming out when I very briefly let some air out.

All pumps on lowest setting (26l/min)
Boilers I believe are 12.4L/min each (24.8 l/min total)

[davidb]

You mentioned upsizing pipework might negate the need for a low loss header, so for instance, if I upsize pipe to 28mm on the flow, then 22mm running to rads, then 15mm tails to individual rads, do I have to mirror the flow in the return, ie, using 28mm pipework, or is it more efficient (also to help when balancing rads higher up)to restrict the return?? Also, when trying to make an old heat only boiler system get water to higher up rads, could I just replace a length of 22mm pipe with some 28mm pipe? If so what would be the minimum length of 28mm pipe?

[hdhanji]

Hydronics, right up my street :)

Top intro to LLHs and the pitfalls to avoid. Great work 👍