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dutchboy
Hi there,
I really, really, really want the answer to this question to be 15mm, but I suspect not!!
I have a Rayburn 460k twin pressure jet which I am installing on a 50' Dutch Barge to feed a small hot water cylinder, two radiators and a towel rail. This is a modern Rayburn with pumped hot water circulation and electrical supply with thermostats and timers. I want to use 15mm copper pipework for reasons of cost and particularly space..... this is very different to a domestic installation involving going through steel bulkheads, with awkward spaces and so forth.
I have read the manual which clearly stipulates 28mm pipe on the send and return to the hot water cylinder and 22mm to the radiators. I have read lots on the internet that these pipe diameters must be adhered to, and lots of advice against using 15mm, but little by way of detailed explaination.
It would be infinitely easier for me to install 15mm pipe everywhere, including reducing the 28mm outlets on the rayburn immediately down to 15mm for the send and return to my hot water cylinder as well as for the rads. However it would be a nightmare to install all the pipes wrongly to find it doesn't work and needs redoing with larger pipe.
And my question is....... why not 15mm! What exactly will happen if I use 15mm pipework? And if there are any pitfalls can this be overcome by some other means instead of increased pipe size.
Many thanks for any help,
Andy
I have read the manual.
I really, really, really want the answer to this question to be 15mm, but I suspect not!!
I have a Rayburn 460k twin pressure jet which I am installing on a 50' Dutch Barge to feed a small hot water cylinder, two radiators and a towel rail. This is a modern Rayburn with pumped hot water circulation and electrical supply with thermostats and timers. I want to use 15mm copper pipework for reasons of cost and particularly space..... this is very different to a domestic installation involving going through steel bulkheads, with awkward spaces and so forth.
I have read the manual which clearly stipulates 28mm pipe on the send and return to the hot water cylinder and 22mm to the radiators. I have read lots on the internet that these pipe diameters must be adhered to, and lots of advice against using 15mm, but little by way of detailed explaination.
It would be infinitely easier for me to install 15mm pipe everywhere, including reducing the 28mm outlets on the rayburn immediately down to 15mm for the send and return to my hot water cylinder as well as for the rads. However it would be a nightmare to install all the pipes wrongly to find it doesn't work and needs redoing with larger pipe.
And my question is....... why not 15mm! What exactly will happen if I use 15mm pipework? And if there are any pitfalls can this be overcome by some other means instead of increased pipe size.
Many thanks for any help,
Andy
I have read the manual.