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Post by Deleted on Nov 9, 2018 15:54:37 GMT
Attachment DeletedCan you pull a vacuum on a pressurised heating system ? It's actually easier to pull a vacuum on these systems than it is on a open vented system, just dump the pressure out and away you go but remember the same rules apply only work on one valve at a time. Attachment Deleted
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Post by woodbine66 on Nov 9, 2018 17:18:21 GMT
Certainly saves a lot of time not having to drain down to change rad valves, etc. Have done loads this way on sealed systems. Usually like to turn off the f and r iso valves under boiler in case the aav breaks the vacuum.
How about snatching a heating oil tank valve swap live, tank full of oil, by pulling a vacuum with a vacuum cleaner?
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Post by rocketmanbkk on Nov 9, 2018 18:01:44 GMT
How do you mean?
Turn off both valves?
I’d like to know this as full drain down is a pain
Cheers
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Post by Deleted on Nov 9, 2018 18:06:36 GMT
How do you mean? Turn off both valves? I’d like to know this as full drain down is a pain Cheers Just turn both rad valves off where you are working Rocky and then dump the pressure out at any point that is easiest, then snatch your new valves on but work one at a time always leaving the other one turned off. |
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Post by endfeed on Nov 9, 2018 18:21:58 GMT
How do you mean? Turn off both valves? I’d like to know this as full drain down is a pain Cheers if you turn the lever valve off to the flow and the return under the boiler,go to a drain off valve on the system,drain about a little out and a vacuum will occur in the sealed system, rocky 👍. |
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Post by endfeed on Nov 9, 2018 18:22:57 GMT
How do you mean? Turn off both valves? I’d like to know this as full drain down is a pain Cheers if you turn the lever valve off to the flow and the return under the boiler,go to a drain off valve on the system,drain about a litre out and a vacuum will occur in the sealed system, rocky 👍. |
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Post by rocketmanbkk on Nov 9, 2018 18:23:12 GMT
Cheers all.
I’ll need to practise that.
It’s a very good tip
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Post by Deleted on Nov 9, 2018 18:31:31 GMT
I don't bother with the boiler because if you're snatching anyway it's a very quick process, minimal amount of water.  we all work differently and what ever suits you best and what you feel comfortable with.  |
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Post by battle1066 on Nov 9, 2018 18:45:42 GMT
Certainly saves a lot of time not having to drain down to change rad valves, etc. Have done loads this way on sealed systems. Usually like to turn off the f and r iso valves under boiler in case the aav breaks the vacuum.
How about snatching a heating oil tank valve swap live, tank full of oil, by pulling a vacuum with a vacuum cleaner?
Rather him than me, cause that looked a tricky clean up operation with the set up in the video - well done to that behave man. |
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Post by endfeed on Nov 9, 2018 19:42:14 GMT
I don't bother with the boiler because if you're snatching anyway it's a very quick process, minimal amount of water. we all work differently and what ever suits you best and what you feel comfortable with. didn't know this p.b, going to give it a go👍🏼👍🏼👍🏼👍🏼👍🏼 |
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Post by Deleted on Nov 9, 2018 19:56:00 GMT
I don't bother with the boiler because if you're snatching anyway it's a very quick process, minimal amount of water.  we all work differently and what ever suits you best and what you feel comfortable with. didn't know this p.b, going to give it a go👍🏼👍🏼👍🏼👍🏼👍🏼 |
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Post by wetfinger on Nov 9, 2018 20:30:24 GMT
I remember someone saying he changes stoptaps live in kitchens wearing only his underpants.
I never freeze, I've had an aerosol kit in my van for so long the box has fallen apart and all the bits rolled away and lost and the can is rusty.
I'm a wetvac snatcher but never touch boiler iso's as they leak and I'm not gas safe.
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Post by endfeed on Nov 9, 2018 20:39:16 GMT
I was working in a plantroom for a swimming pool,and there was a guy working inside the massive storage tanks in his wet suit 😂 didn't see his surf board though 😁😁😁😁
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Post by Deleted on Nov 9, 2018 20:44:20 GMT
I remember someone saying he changes stoptaps live in kitchens wearing only his underpants. I never freeze, I've had an aerosol kit in my van for so long the box has fallen apart and all the bits rolled away and lost and the can is rusty. I'm a wetvac snatcher but never touch boiler iso's as they leak and I'm not gas safe. The only time I freeze on heating if it's a big property/building where the heating has many zones, you can shut that zone down and leave the others running then the freezer comes in handy. No drain down, no fuss. |
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Post by endfeed on Nov 9, 2018 20:49:31 GMT
I like your drip catcher tub👍🏼👍🏼
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we all work differently and what ever suits you best and what you feel comfortable with. 
we all work differently and what ever suits you best and what you feel comfortable with. 