I decided to use a Rothenberger dry pressure tester to test as I went with my replacement installation of central heating (moving cylinder, valves, pump, filter, etc...) and everything has worked great so far. Only fault found previously was the nuts on the pump valve not nipped up enough.
It's progressed a little further now and I'm close to the point when I tie in to the existing flow/returns and rads. But last night I pressurised with around 10psi and after 1 hour it was rock solid at the same 10psi - great, I thought. I decided to leave it overnight and, yep, this morning it was back to zero
I'm left thinking there is a leak, well der!!, but when I was testing last night I used leak spray (i.e. same stuff used for gas) and nothing bubbled up, I checked every fitting, all motorised valve joints - everything. and I saw nothing.
I'm using JG endcaps to cap off the yet to be connected pipes, all of which are pushed on firmly.
Either I have a leak in the pipe work, or the pump (which is new) or the motorised valves, or it could be the hwc coil.
it's a gravity system so pressure wise I'm pushing it harder than it will be pushed, but the whole idea it to dry test it before I introduce the wet stuff!
Am I being too hard on the system? 10psi isn't that much and over one night - it shouldn't leak, or is there some gotcha with this dry testing lark that I don't know about yet?
I can redo check again tonight but in the past the leak spray has been really useful, just not this time unfortunately
anything else to try?
It's progressed a little further now and I'm close to the point when I tie in to the existing flow/returns and rads. But last night I pressurised with around 10psi and after 1 hour it was rock solid at the same 10psi - great, I thought. I decided to leave it overnight and, yep, this morning it was back to zero
I'm left thinking there is a leak, well der!!, but when I was testing last night I used leak spray (i.e. same stuff used for gas) and nothing bubbled up, I checked every fitting, all motorised valve joints - everything. and I saw nothing.
I'm using JG endcaps to cap off the yet to be connected pipes, all of which are pushed on firmly.
Either I have a leak in the pipe work, or the pump (which is new) or the motorised valves, or it could be the hwc coil.
it's a gravity system so pressure wise I'm pushing it harder than it will be pushed, but the whole idea it to dry test it before I introduce the wet stuff!
Am I being too hard on the system? 10psi isn't that much and over one night - it shouldn't leak, or is there some gotcha with this dry testing lark that I don't know about yet?
I can redo check again tonight but in the past the leak spray has been really useful, just not this time unfortunately
anything else to try?
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