Hello! Advice required, please.
Trying to understand implications of pipe size, length of run, and number of junctions etc. en route between the incoming water feed to the Combi-boiler. For various reasons it is difficult to get from stopcock to boiler without taking indirect route back across room under kitchen floor, directly upwards to ceiling, through wall into utility, back along 2 walls and into boiler, around 12+ metres (with various bends and junctions). On the way, (whether a good idea or not), it would seem simpler to branch off to all the various places requiring cold feed (as shown in diagram).
The question is - if flow rate is 16 litres / minute as it enters house, if using 22 mm copper pipe around to boiler, and it's also 22 mm for the initial branches off en route (before the branches drop to 15 mm at sinks, appliances, etc.), would flow rate still be at or near 16 litres / minute arriving at boiler?
Diagram attached.
(If flow rate arriving at boiler is going to be impacted, it may be possible [but more disruptive] to take a more direct route to boiler as shown by 'dashed pipe' - would this be better? or unnecessary?)
Any advice/comments welcome.
(As you have probably gathered, I am not a plumber or boiler installer! but would like to understand this as I have had conflicting information and don't want to have a Combi-boiler installed that is not going to receive enough water flow rate to work to its potential. I am looking at something like 40W Worcester Greenstar 8000 Combi, which wants around 16 l/min incoming flow rate. Not included in diagram, but for information, will also be about 15 rads, with 22mm Flow/Returns, branching to rads on 15mm)
(I am aware many would advise not using a Combi for house with more than one bathroom etc., and go for boiler with hot water tank etc., but for various reasons I would like Combi if possible.)
Thank you for any help.
Trying to understand implications of pipe size, length of run, and number of junctions etc. en route between the incoming water feed to the Combi-boiler. For various reasons it is difficult to get from stopcock to boiler without taking indirect route back across room under kitchen floor, directly upwards to ceiling, through wall into utility, back along 2 walls and into boiler, around 12+ metres (with various bends and junctions). On the way, (whether a good idea or not), it would seem simpler to branch off to all the various places requiring cold feed (as shown in diagram).
The question is - if flow rate is 16 litres / minute as it enters house, if using 22 mm copper pipe around to boiler, and it's also 22 mm for the initial branches off en route (before the branches drop to 15 mm at sinks, appliances, etc.), would flow rate still be at or near 16 litres / minute arriving at boiler?
Diagram attached.
(If flow rate arriving at boiler is going to be impacted, it may be possible [but more disruptive] to take a more direct route to boiler as shown by 'dashed pipe' - would this be better? or unnecessary?)
Any advice/comments welcome.
(As you have probably gathered, I am not a plumber or boiler installer! but would like to understand this as I have had conflicting information and don't want to have a Combi-boiler installed that is not going to receive enough water flow rate to work to its potential. I am looking at something like 40W Worcester Greenstar 8000 Combi, which wants around 16 l/min incoming flow rate. Not included in diagram, but for information, will also be about 15 rads, with 22mm Flow/Returns, branching to rads on 15mm)
(I am aware many would advise not using a Combi for house with more than one bathroom etc., and go for boiler with hot water tank etc., but for various reasons I would like Combi if possible.)
Thank you for any help.