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PostPosted: Thu Apr 12, 2018 11:08 am 
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Hope this is not to silly

Can I just drain the heating system

In the loft I have two tanks/header/pots/buckets what ever. Fresh water comes up in 22Mm or imperial sized pipe. It Tees off on 15mm

Left goes to the massive tank/header/pot/bucket with isolating tap on

Right goes to the very small tank/header/pot/bucket. with isolating tap on

I am thinking the very small one is the Heating system and the massive one is for the bathroom taps bath shower kitchen etc...

So my theory is this......... As I am only changing the heating pump I only need to turn off and drain the very small tank/header/pot/bucket

AND.... drain the rads from the lowest point last in the chain then open the the rads to rush air..

PS I did try the brass valves either side of the heating pump clockwise but didnt seem to hold water as when I undid the big nuts water kept coming


AM I CORRECT PLEASE HELP

Ta

RICH


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PostPosted: Wed May 09, 2018 10:26 pm 
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Nobody has replied,so........

I'm no expert but i've done this job at home.
The shut off valves either side of the pump can seize/leak thru etc, but you'll always get some residual water so towels handy is good.
Your draining technique is correct. Obviously, change the valves when you change the pump.
When repairs are complete,close all bleed valves,and refill the system,fresh water first. Fire-up the system, bleed as required.
Check for leaks where you've worked,and then add inhibitor to the loft tank.


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PostPosted: Wed May 09, 2018 11:05 pm 
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You don’t need to drain the system, just bung the cold feed if you don’t have a working gate valve on the fill pipe from the expansion tank, then bung or cap the vent pipe over the expansion tank.

You will get a small amount of water from the faulty pump gate valves but it will soon stop.

Replace butte pump gate valves as well.

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PostPosted: Thu May 10, 2018 7:59 am 
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Thank peeps thats what I needed to know
I will crack this job today
ta
Am I not supposed to put help things on here
Rich


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PostPosted: Thu May 10, 2018 9:20 am 
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gas4you wrote:
You don’t need to drain the system, just bung the cold feed if you don’t have a working gate valve on the fill pipe from the expansion tank, then bung or cap the vent pipe over the expansion tank.

You will get a small amount of water from the faulty pump gate valves but it will soon stop.

Replace butte pump gate valves as well.

Both!

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www.drlgas.co.uk


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PostPosted: Thu May 10, 2018 9:28 am 
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Cheers
Im almost there already
Got Pump off just need to put new one on and wire up
Cheers
So easy
Rich


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