Would a plumbing manifold be beneficial?

Joined
15 Jul 2012
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Cheshire
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Evening all,

I'd appreciate your thoughts on whether or not I'd benefit from fitting a hot and cold manifold while re-doing my bathroom.

My incoming water supply enters in the boiler cupboard. From there it tees off into the boiler one way and off to the toilet, then sink, then bath and finally off to the kitchen. The hot supply from the boiler follows the same route, obviously bypassing the toilet.

I'm planning on running all pipe work under the floor in plastic and had planned on following a similar route. However, this means having joints under the floor which will be completely inaccessible once the flooring goes down. Although this shouldn't be a problem if done properly, it could be inconvenient in the event of a problem.

Another consideration is water pressure. My supply is 15mm and delivers just over 20l per minute. I've no idea what the actual pressure is though. At the moment, if using the tap in the kitchen and someone turns a tap on in the bathroom or flushes the toilet, the flow in the kitchen all but goes until the bathroom tap is turned off or toilet is full. I'm wondering if a manifold system will allow for a more balanced flow on all taps.

The downside to a manifold is the amount of pipe work involved. I'll effectively be replicating the toilet run with the pipes to the sink and replicating the sink run with the pipes to the bath and again replicating the bath run with the pipes to the kitchen. Whilst each pipe run to the bathroom will only be 4m max, it does seem like a manifold system would create quite a few dead legs in the system.

Any thoughts or opinions from those with experience of manifolds would be much appreciated, especially with regards to my query about a more balanced flow and whether that, combined with the lack of concealed joints, is enough to outweigh the additional pipe work involved.

Thanks in advance.
 
Plumbing manifolds are quite common abroad and are being specified on high end flats and appartments over here.

The main advantage is that all the appliance isolating valves are in one area so making life easy for caretakers / maintenance men to turn off just one appliance at a time. Also no joints between the manifold and the appliance.

Hep2o do a range of plated brass manifolds in 2, 3 or 4 port versions. they can be connected together to make different combinations or blanked off.

Each port has it's own built in isolating valve with a reversible disc (Red or Blue) and a slot that can be set to read "WC, Bath, Basin" etc

See here http://assets.wavin.co.uk/ajax/productPage.aspx?id=7477
 
Stop worrying and just do it the normal way and put them under floor...if there done right they won't ever leak
 

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