Afternoon all.
After a bit of advice/guidance.
I'm currently refurbing my 1st-floor bathroom and the ancient plumbing system in the house whilst I'm at it.
It'll have a shower, toilet, basin and a standard size bath. I'm planning a secondary circuit (in copper) for hot water (22mm in and a 15mm return) as currently, it takes around a minute to reach the bathroom in the loft and nearly as long to reach the bathroom I'm refurbing.
There is a loft bathroom directly above, currently fed (using JG) by tee-ing into existing 15mm (both hot and cold) off a mish-mash of 15 & 22 + a bit of galvanized steel which I'm going to replace - the mish-mash that is (not the PEX feeding the loft bathroom).
I'm currently on a combi with 15mm hot outlet, but this is soon to be replaced with an unvented system with a 28 or 32mm feed from the street, into 22mm - pressure into the property is 3bar, current flow rate around 14lt per min.
I'm planning on building 2 copper manifolds for hot and cold with isolators to serve the refurb bathroom and loft bathroom using 22mm copper and taking 15mm branches (in PEX) 1 for the shower, 1 toilet, 1 basin and 1 for the loft for the cold and 22mm off the manifold in PEX to the bath.
The second manifold (again in 22mm) for the hot, 1 shower, 1 basin, 1 for loft and again feed the (standard size) bath off that in 22mm PEX and return from the manifold to the cylinder in 15mm copper.
My question is: Am I wasting my time running to the bath in 22, would 15mm PEX off the manifolds be sufficient? I'm not bothered about a few quid saved given what it's costing I just don't want to waste the pipe/money/effort if I'm not going to fill the bath any quicker!
Also, am I wasting effort with the secondary hot water given that I will be reducing the length of pipe runs significantly? They'll probably be around 7 metres to the refurbed bathroom and around 12 to the loft bathroom. Hope that makes sense!
Shout if you've any questions.
cheers, Chris
After a bit of advice/guidance.
I'm currently refurbing my 1st-floor bathroom and the ancient plumbing system in the house whilst I'm at it.
It'll have a shower, toilet, basin and a standard size bath. I'm planning a secondary circuit (in copper) for hot water (22mm in and a 15mm return) as currently, it takes around a minute to reach the bathroom in the loft and nearly as long to reach the bathroom I'm refurbing.
There is a loft bathroom directly above, currently fed (using JG) by tee-ing into existing 15mm (both hot and cold) off a mish-mash of 15 & 22 + a bit of galvanized steel which I'm going to replace - the mish-mash that is (not the PEX feeding the loft bathroom).
I'm currently on a combi with 15mm hot outlet, but this is soon to be replaced with an unvented system with a 28 or 32mm feed from the street, into 22mm - pressure into the property is 3bar, current flow rate around 14lt per min.
I'm planning on building 2 copper manifolds for hot and cold with isolators to serve the refurb bathroom and loft bathroom using 22mm copper and taking 15mm branches (in PEX) 1 for the shower, 1 toilet, 1 basin and 1 for the loft for the cold and 22mm off the manifold in PEX to the bath.
The second manifold (again in 22mm) for the hot, 1 shower, 1 basin, 1 for loft and again feed the (standard size) bath off that in 22mm PEX and return from the manifold to the cylinder in 15mm copper.
My question is: Am I wasting my time running to the bath in 22, would 15mm PEX off the manifolds be sufficient? I'm not bothered about a few quid saved given what it's costing I just don't want to waste the pipe/money/effort if I'm not going to fill the bath any quicker!
Also, am I wasting effort with the secondary hot water given that I will be reducing the length of pipe runs significantly? They'll probably be around 7 metres to the refurbed bathroom and around 12 to the loft bathroom. Hope that makes sense!
Shout if you've any questions.
cheers, Chris
