You're the living proofthats fair comment
but there are many one pipee systems still in use
point i was making is just because its an old way don't make it wrong or incorrect
Old back boiler.
- Thread starter carakas
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1CANHELP
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You would be a mug to place a modern condensing boiler on an old inefficient ONE PIPE SYSTEM and if you are planning to upgrade the controls to comply with part L then TRV's will be required, therefore, your one pipe system will not work.
The disadvantages of a one pipe system, hence why we don't fit them now are:
1. The first radiator in the system passes it's cooler water back into the main pipe, this has the effect of reducing the temperature of the water and this happens all the way arund the circuit.
This then means the last radiator on the circuit is always cooler then the first. The size the radiators and circuit will determine how much cooler it will be i.e the larger the circuit the cooler the last radiator will be.
2. The pump forces the water around the pipework NOT through the radiators, the radiators heat due to convection currents, therefore, you need radiators the show very low resistance to those currents for the radiators to heat correctly.
Modern radiators are not great for one pipe systems and trv's basicly stop the system working correctly.
Be wary on here as 95% are short course trained idiots, on here to supplement there large lack of knowledge as they have not served an apprenticeship or diy numpties who are too tight fisted to get a professional in.
The only option is to replace the entire heating system, hell! at the end of the day you have had 37 years out of it FFS.
Advice
Get 3 quotes from LOCAL businesses AND LOOK FOR:
1. Gas safe registration
2. A business address and landline number.
3. Look for CIPHE or SNIPEF registration and ensure min level three qualification i.e ADVANCED PLUMBER status, it will be on their grade card.
This is important as you will ensure that they have served a recognised apprenticeship and will ensure you do not get any of the 12 month trained gas idiots or 6 month college trained short course plumbing idiots.
When installed you should receive,
1. minor works certificate from the electrician
2.The Benchmark should be completed at the back of the boiler installation manual.
3. Registration confirmation from gas safe and the warrenty cover from the manufacturer.
By the way I run a Gas Safe, NICEIC, OFTEC and MCS registered business and have been in business many a year.
So take heed as thats the best advice you will get!
I will await the diatribe from all the short course and BG/SG fannies
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'scuse my ignorance, but won't return temperatures on a one-pipe system be higher than two-pipe? Otherwise last radiators will run cool. With a condensing boiler, I thought low return temp was important for efficiency.
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M
mysteryman
Still bad behaviour from some of you!
If the existing one pipe system works OK, then I can't see why a new boiler wouldn't work with it. Agreed, it will be difficult to clean it out first. One way would be to remove all the rads, capping branches if there aren't valves on both ends of all rads. Powerflush the pipe loop, and each rad individually before refitting them.
You may need to keep the pump speed well down. I think this could be good for weather compensation as well - one pipe systems can lend themselves to low flow temps.
If the existing one pipe system works OK, then I can't see why a new boiler wouldn't work with it. Agreed, it will be difficult to clean it out first. One way would be to remove all the rads, capping branches if there aren't valves on both ends of all rads. Powerflush the pipe loop, and each rad individually before refitting them.
You may need to keep the pump speed well down. I think this could be good for weather compensation as well - one pipe systems can lend themselves to low flow temps.
See a man with sense at last.
icanhelp said:
And then we have a load of rubbish from icanhelp.
They sell TRV's for one pipe systems.
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It will work fine, and with trv's fitted as well, just that flushing the rads gonna be a pain as they will have to be removed.
Where?
I'll be blowed. Never seen those before. Will bear them in mind for the next (rare) occasion that someone wants to keep a one pipe that I'm working on.
Cheers Kev.
Cheers Kev.
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