About a year ago, we had a Worcester Bosch combi installed to replace the old regular boiler, converting our heating from open vented to sealed. This caused one of the rads downstairs to spring a small leak. I replaced the leaky rad a couple of months ago, and replaced the bathroom radiator with a towel rail at the same time.
Problem is: now we keep getting air at the top of the towel rail, which makes a gurgling noise. I've been venting it daily. The air flows for about 2-3 seconds.
I'm woried whether I have a leak somewhere. I've checked all the rads & exposed pipework, but can't see anything. No wet patches in the ceilings. The pressure gauge on the boiler hasn't budged visibly from 1.25 bar since I topped up the system about 6 weeks ago.
Can anyone suggest how to figure out if I have a leak, or how the air is getting in?
Thanks for your suggestions!
- Matt.
PS I read a suggestion about methane build-up from debris in the pipes elsewhere in this forum. I tried holding a lit match to the air/gas as it was vented out, and it definitely isn't flammable.
PPS the missus pointed out that the design of the towel rail would trap loads of air inside the horizontal rungs as it was filled. But since the daily venting has been going on for weeks/months, I would have expected the trapped air to work its way out by now...
Problem is: now we keep getting air at the top of the towel rail, which makes a gurgling noise. I've been venting it daily. The air flows for about 2-3 seconds.
I'm woried whether I have a leak somewhere. I've checked all the rads & exposed pipework, but can't see anything. No wet patches in the ceilings. The pressure gauge on the boiler hasn't budged visibly from 1.25 bar since I topped up the system about 6 weeks ago.
Can anyone suggest how to figure out if I have a leak, or how the air is getting in?
Thanks for your suggestions!
- Matt.
PS I read a suggestion about methane build-up from debris in the pipes elsewhere in this forum. I tried holding a lit match to the air/gas as it was vented out, and it definitely isn't flammable.
PPS the missus pointed out that the design of the towel rail would trap loads of air inside the horizontal rungs as it was filled. But since the daily venting has been going on for weeks/months, I would have expected the trapped air to work its way out by now...