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HOW TO DRAIN A CYLINDER (not a tank) using siphonic action with a hose pipe also covers drain cocks
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- Опубликовано: 3 май 2020
- Derek shows us how to drain a hot water cylinder (this is not a tank) Te first part covers siphoning out the water using a hose pipe the second part covers drain cocks and how they work
Your video has been a great help and I've managed to remove my primatic cylinder and all the copper & lead pipework. I filled the hosepipe with water like you advised.
Also thanks for mentioning the part 2 ball valve.
I've probably forgot the number of drain cocks over the years that haven't worked, siphoning every time for me👍. Good video again by the way
Spot on,most helpful 👌.
Recently subbed to your channel as im learning to become a gas engineer. Your content is awesome for someone learning about gas especially when i cant get to college due to the coronavirus. Amazing videos keep them coming
Great video. The way you showed siphonic action was brilliant. I have always heard of it but never paid attention to how it actually works.
Thanks Derek 👍🏻
Asian Jon. Training.
Two words, Brilliant video.
That was a brilliant video gained a lot of knowledge from it. Top Man. Thanks
Great video Derek...heard a storey of a bloke draining one via the lower immersion heater ....believe he had a soaking LOL.
another great video Derek,THANKS
48x16 was always a challange, it seem to take forever. Nice one Big D
Very useful video. Thank you very much Derek. 😃👍
Great vid again Derek 👍👍
found the video very informative and useful.
Many thanks sir very helpful video
Thanks Derek. Benny
That was good advice. But how about a vented system.
Very good video
I liked. Thanks 👍😊
Great video 👌
Yes just watched it back. One must be a vented f & e indirect system. What's the system type is the one with the red expansion vessel?
Sealed unvented system fella. That’s the expansion vessel you describe...
Great video, thank you. Is it necessary to also drain the central heating circuit when draining the cylinder to work on for example, the immersion heater ?
No not in most cases if the cylinder has a coil
great video.
Can you please make video cover Flue Subject.
Thank you
Hi nice video ,
I have a question please .
I have to replace a tap in my downstairs cloakroom. But is not any isolation valve on it .
I have a boiler with an Unvented cylinder upstairs, so I understand if I shut off the main feed valve in the cylinder I stop the cold go into .
But how I can isolate the hot water side ?
Is not any valve after the cylinder 🤔
If you turn the main stop tap off it will turn your cold and hot off at the same time
@@tomkatgastraining seems to the hot water side not stopping 🤔🤔🤔
@@Matteo-rs7nk if you have an unvented cylinder it’s fed from the mains cold supply to the house there should also be an isolation valve at the combination valve at the cylinder if it’s not stopping but it will run for a short time before it stops
Dave Thompson. 👍
Brilliant
Hi Derek thanks for sharing my questions is if I have 15 meter hose pipe long and want to drain cylinder should I fill hose pipe first ?
I will always have my hose empty because if it’s full of water you could create the siphonic action before you get the hose outside. Also when sucking on the hose to create the vacuum you don’t want a mouth full of dirty water.
@@tomkatgastraining thank you for respond you are top man 👍🏼❤️💐🙂
What's the red expansion vessel for in the video above the cylinder? This a mismatch of two previous videos? :-)
Wayne Nixon it a mix of new and old videos to try and explain in more detail. The system with the expansion vessel was a sealed heating system with a vented hot water system. Hope that helps 👍🏻
@@tomkatgastraining Was the coil in the cylinder pressurised? Didn't think cylinders could be part of a pressurised system? But at 1 bar it's just like having a feed cistern at 10m head?
Drill pump save all the hassle 👍
Sparky but I don’t have one of them
Tomkat Gas Training you get them on amazon for around £12 well worth it can pump upto 2 meters vertical might get you out a jam one day 👍
chris Taylor
First thing I do when buying drain off is to take out the guts and NOT forget to put them back in once soldered 🏊♂️🏊♂️🏊♂️🏊♂️🚣♂️🚣♂️🚣♂️🌊🌊🌊🌊
CH👍
WLO