- Micro bore
So I’ve a microbore plumbing solution at the moment for my radiators. They’re pressed without convectors and with single entry connections. Whilst this seems a brilliantly tidy system, no one seems to think so anymore.
So I’d like to swap the rads for convectors and pressurise the circuit but every plumber that’s been round says they don’t want to reuse the existing pipe work.
I’m wondering has anyone gone down this route and subsequently had a blockage or had to deal with a problem like a leak under the screed.Posted 2 months agomatt_outandaboutSubscriber
We had two plumbers refuse to install new boiler because of it in our house.Posted 2 months ago
Third just said ‘it’s not ideal’.
I’ve re-routed much of ours to add thermostatic valves and added two extra spurs from the main manifold. Thankfully our manifold is under a hatch in the downstairs cupboard, so easy to access.
It’s taken a bit to balance the system. I’ve three last radiators upstairs to replace and new TRV’s install this spring and I’m sure they will mess with the balance again….
Those with combi upgrades presumably you originally had a vented system and then pressurised it?
When you say re routed presumably that’s because there’s no longer a nice neat single entry option available that Has a trv.
Re the balancing I do seem to get rads hot upstairs but down a bit Luke warm, I thought it might be air but maybe it’s balance.Posted 2 months ago
Ours isn’t noisy (quieter than the 15mm in our old house in fact which banged and creaked and generally made a racket). From what I can see the pipes look largely ok.
Presumably if there was a lot of sludge I’d get black water when bleeding a rad? Or not necessarilyPosted 2 months agoThe Flying OxMember
We went from open-vented system to combi with no problem. 22mm main flow and return running the length of the attic with 8mm off to each radiator. We didn’t have those daft single radiator valves – they are bobbins. Did have a magnetic filter installed and a powerflush at the same time.
Can’t see any reason why new boiler and better rads would be a problem, although new system throughout would be better. Depending on size of house and ease of access under floors it shouldn’t be that much more work.
Source: am heating engineer.Posted 2 months ago
Thanks TFO. Assume yours is copper rather than the new er plastic micro bore. Down stairs we’ve a screed, so access to pipes is non existent other than the bit poking out of the floor. I Can see the downstairs manifold, not sure where the upstairs one is but expect it should not be too far from the airing cupboard in the middle of the house.
They manifold looks like it’s just stuck on the end of a piece of 22mm pipe sticking out of the floor but assume there must be a couple of pipes within it to give flow and return.Posted 2 months ago
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