Upgrade to polypipe from the road

[GH1]

Hello again,

been told before extending house and upgrading boiloer / hot water system to "pressurized" I should upgrade my existing pipework (into the house from the road) to 22mm poly pipe. Apologies if its a dumb question but I'm not clear what it will do for me. No tests have been done on pressure /flow of existing is it normal to upgrade this.

Can anybody out there explain what benefit that will give ?

Thanks
GH

 

[gas4you]

For starters I think you mean 25mm blue alcathene (spelling ).

This should be the minimum diameter you need. A lot a properties now use the next size up, 32mm I think.

This will increase flow rate to your property but not necessarily the incoming pressure as this si set by your water co.

Pressurised cylinders ideally need at least 20 l/min and at least 3-3.5 bar pressure to get the best out of them and make their fitting worthwile.

Your plumber should have taken some basic pressure and flow readings first though

 

[GH1]

Thanks for the response very thorough. Assuming my plumber doesn't take any measurements is it likely that we will have less than the 3 bar required ? Can I check this with the local water authority to give me confidence ?

Any feedback appreciated.

GH

 

[gas4you]

You can, but it is always bes to test it a your property, so you know your individual results. Can't understand why your plumber hasn't tested it already before advising/quoting on your new installation