Critique my manifold design.

[MikeSharp01]

I have come up with a manifold (I need 2 one for hot and one for cold) that is fabricated from soldered copper. Before I put them into manufacture I thought I would seek the collective wisdom's view on the idea - what have I missed / got wrong / forgotten. It has single 22mm inlet two main runs leading to 15mm outputs with a central balancing support run. We have good water pressure, 3 Bar at this point and very good flow.  See image below and let.

 

[JohnMo]

Why so complex?

 

Just buy a bog standard manifold such as - first one I came across

 

https://underfloorparts.co.uk/product/plumbing-manifold-5-port-with-service-isolation-valves-universal-hot-and-cold-water/?srsltid=AfmBOorfGw6dC3Kp3bBGSXzk3717nPjKeRyytjno3wxLyrTh9oFQOkhaIOA&gQT=1

[BotusBuild]

Something like this is what I put together, one for hot, one for cold

 

 

Using these, although they were  cheaper when I bought them.

 

 

Have you thought about using push fit plastic to create this manifold? 

[JohnMo]

This mine 2x 5 port (hot and cold), single feed, no flow issues.

[MikeSharp01]

25 minutes ago, JohnMo said:

Why so complex?

Well essentially because I want 2 pipes going up the wall and 3 pipes going down so I thought this was quite elegant in its way, the ball valves are full bore and fast to operate. 

[Nickfromwales]

53 minutes ago, MikeSharp01 said:

Well essentially because I want 2 pipes going up the wall and 3 pipes going down so I thought this was quite elegant in its way, the ball valves are full bore and fast to operate. 

You can make up (or maybe buy) a union that reverses 3/4” male to a female (3/4” coupler) and then have 2x hep2o manifolds to the same thing, so the first facing up, and the second facing down; the hep units link male > female, and sit in the same direction, hence you’d need to rectify that so you could go male > male or female > female, whichever works better.

 

Obvs you’d have an issue creating the looped feed to both ends, but tbh with good pressure and no 28mm pipework, I doubt there’s any need to create the looped feed.

 

 

or

 

 

which will allow you to flip the second one 180°