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Post by Plumberboy on May 12, 2017 18:45:11 GMT
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Post by Plumberboy on May 12, 2017 18:46:50 GMT
I've seen this a few times and normally when you convert over to a sealed system.  |
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Post by battle1066 on May 12, 2017 19:03:55 GMT
I've seen this a few times and normally when you convert over to a sealed system. What's the difference in system values for fully pumped vented system and a pressurised sealed system?  |
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Post by tomplum on May 12, 2017 19:09:09 GMT
all rad valves are the same for domestic plumbing battle,  |
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Post by battle1066 on May 12, 2017 19:16:20 GMT
all rad valves are the same for domestic plumbing battle, No Tom I was interested in system pressure values since the video implies changing to a pressurised system caused a leak. |
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Post by tomplum on May 12, 2017 19:23:03 GMT
the extra pressure finds the weak spots like old rads,bad pipework, compression joints, badly soldered joints, they'd all stand the new pressure if they were new, And not part corroded, downloadlove
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Post by Plumberboy on May 12, 2017 20:00:51 GMT
You get less corrosion in a sealed system battle because there is no vent = no oxygenated water.,,,installation costs are cheaper too.
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Post by endfeed on May 12, 2017 20:12:19 GMT
all rad valves are the same for domestic plumbing battle, No Tom I was interested in system pressure values since the video implies changing to a pressurised system caused a leak. Im gona gues 1.5 for combi.....and about 0.5 for vented....  |
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Post by battle1066 on May 12, 2017 20:14:30 GMT
You get less corrosion in a sealed system battle because there is no vent = no oxygenated water.,,,installation costs are cheaper too. I understand those pointers PB but what's the physical pressure difference between the two system? |
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Post by tomplum on May 12, 2017 20:43:55 GMT
Oh I see battle you're asking for values, I missread, i thought it was valves,,,,like endfeed says pressurized is usually limited by a restictor at 2.5 bar, gravity is 1 bar or less,  |
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Post by Plumberboy on May 12, 2017 21:29:10 GMT
You get less corrosion in a sealed system battle because there is no vent = no oxygenated water.,,,installation costs are cheaper too. I understand those pointers PB but what's the physical pressure difference between the two system? Yes as others have said battle.  I've known old rads to swell on a system swap on the cold fill up.  |
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Post by dickpuller on May 12, 2017 22:10:21 GMT
You get less corrosion in a sealed system battle because there is no vent = no oxygenated water.,,,installation costs are cheaper too. I understand those pointers PB but what's the physical pressure difference between the two system? Normally as said B; a sealed system will have a cold pressure of around 1-1.5bar. Say you've a bungalow with an open vented system & the Feed & Expansion tank, just sitting on the ceiling joists/roof truss(2.4M ceiling height) - the system pressure would be roughly 0.24bar. 10M head = 1bar pressure......  |
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I've known old rads to swell on a system swap on the cold fill up. 
