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Discuss second bathroom in attic query in the UK Plumbers Forums area at Plumbers Forums

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276
Hi everyone,

I have a question about adding a second bathroom to a house. My parents house has one bathroom upstairs and the house is all mains fed the water tank was removed decades ago. They are converting the attic and will have a small bathroom with a toilet, basin and shower cubicle.
When connecting the new bathroom to the current pipework what is needed for example, how do you connect the new shower to the existing pipework or do you need to have a separate feed? Also are any valves required as it will be additional bathroom connected to what pipes are in the attic, just want to make sure everything is legit and all the right materials are acquired, thanks.
 
What system do they have ?
 
Honestly you can leave all of that up to whoever is doing the work.
You can ask them to use all copper pipe etc if you wish but make sure you say the same thing to each potential quoter do that the quotes are comparable.
 
They have a gas combi boiler only a few years old but big enough for a 4 bedroom house. There is a big pipe which feeds into the bathroom downstairs, can you use that same pipe by connecting a new copper pipe to the new shower or would you need to create a separate feed to the upstairs bathroom.
One plumber said he would just need to join on a new copper pipe to the existing pipe with isolation valves and a NRV but another plumber said he would make a separate pipe connection so just thinking which one is right if any? thanks
 
As it’s off a combi doesn’t really matter either way is fine
 
Water mains pressure needs to be considered.
How high is the shower head in the loft, how much pressure do you have at ground level?
Any Plumber worth his (or her) salt will know what to check and how to pipe it for the best.
 
Thank you for the reply. The ground floor of the house in the kitchen has lower pressure maybe around 7 to 8 LPM, the first floor bathroom has 12 Lpm water pressure The attic has all the pipe work which connect to the downstairs bathroom, so the last plumber suggested cutting at the existing bathroom pipe in the attic and adding a new pipe which connects to the new bathroom shower, would any valves be necessary, the first floor bathroom water supply won't be mixed with the new bathrooms will it and does this seem about right?
 
Thank you for the reply. The ground floor of the house in the kitchen has lower pressure maybe around 7 to 8 LPM, the first floor bathroom has 12 Lpm water pressure The attic has all the pipe work which connect to the downstairs bathroom, so the last plumber suggested cutting at the existing bathroom pipe in the attic and adding a new pipe which connects to the new bathroom shower, would any valves be necessary, the first floor bathroom water supply won't be mixed with the new bathrooms will it and does this seem about right?
It is the pressure you need to know. It will be in bar normally. Needs to be measured with a gauge.
 

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