Plumbing help

Ha Ha noobs in a mavity fed hot water system the cylinder is fed from the bottom tapping and feeds the house with hot water from the top tapping so opening a tap to drain it once the cold main is isolated does nowt but levels the water in the pipework generally keeping the cylinder full.

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There must be a way to drain it, because i doubt the heater is the original one. It's been replaced in the past most likely, and the person who did it didn't drill a hole in the tank to drain the water did they?

I would just try the easy method first. Tie the ballcock up, then turn on all hot taps to drain. See if it works.
 
Lethagized said:
There must be a way to drain it, because i doubt the heater is the original

I would just try the easy method first. Tie the ballcock up, then turn on all hot taps to drain. See if it works.
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please for the love of god stop suggesting this it will not work if the cylinder has been installed correctly it will not drain.
 
Lethagized said:
Ok then smartarse, if you're the expert then why not suggest something to help him instead of calling everyone noobs because we aren't plumbers?
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(I know you said no touching the pipework but I have no idea how you would do it without)

Isolate mains

drain CWS tank by opening hot taps (this is all it will do)

cut in to hot feed run hose in to cylinder to drain contents

cut cold feed at base of cylinder once empty

Change immersion heater

add drain off on an EF tee at base of cylinder on cold feed along with gatevalves on cold feed (before DO on cold supply to cylinder) and hot feed.

re fit pipework fill test.

Sit back and have a cuppa.

Does that help :)


Oh and in no way am I a plumber or have ever plumbed a fitting in my life.
 
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Tie off the ball-valves in the header tanks and then remove the "hot" tapping at the top of the hot water tank. Drop a hose in and suck the water through until it drains out through mavity!
 
Sounds like it's done already but if the issue was just finding a drain point then why didn't he just unscrew the cold feed coming into the tank and the water would have drained out from that.
 
Hades said:
Sounds like it's done already but if the issue was just finding a drain point then why didn't he just unscrew the cold feed coming into the tank and the water would have drained out from that.
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Yeah, he considered that at the start but didn't want to - said the joints looked old and he didn't want to break anything.
 
normally you just siphen out the water usning a hose, to outside or down the toiler, you just suck the water through the hose and leave it, doing its job
 
Mickie said:
normally you just siphen out the water usning a hose, to outside or down the toiler, you just suck the water through the hose and leave it, doing its job
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That would work is the immersion heater was at the top, which it was not. It was at the bottom. You open that, and lo and behold comes a torrent of water everywhere.
 
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