Potterton Kingfisher II

C

Chunkydoc

• 26 Sep 2012

• #1

Evening all.
I've got the above boiler and home, and whilst it's had a few minor issues this year, touch wood, nothing serious.

Now, had a plumber round to fix the latest issue a few months ago and asked him for a quote to replace. His response was that whilst it's old and in-efficient it's still working so not worth replacing.

Just looking for opinions and wonder if anyone agrees with this approach or not.

Answer on a postcard please.

 

C

Chunkydoc

• 26 Sep 2012

• #2

Ah you gotta love tempting fate.
One of the 2 way valves is now refusing to operate of its own accord. It's the one that is part of the HW loop and runs through the tank upstairs.

Can't quite see the model but it's a siemens something or other. Anyone advise how easy these are to replace? I see 2 ruddy great nuts attaching it to what looks like 22mm pipe, but am not sure how to drain the system and re-fill if it needs taking out totally.

Thanks

 

Hugh Jaleak

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• 26 Sep 2012

• #3

See here: //www.diynot.com/forums/plumbing/oh-bother.337882/

 

M

macfudd

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• 29 Sep 2012

• #4

Keep the boiler as long as you can but get it properly serviced regularly.As long as the few parts that are needed for it are available and you can afford the gas bills it should give you far less trouble than most condensing boilers.

 

Hugh Jaleak

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• 29 Sep 2012

• #5

2 port valves are fairly easy to do, drain system to below level off valve. Isolate electrics, undo both compression nuts either side of valve and remove. Swap wires like for like (or it wont work), fit new valve, refill and vent system before attempting to light boiler.

 

C

Chunkydoc

• 29 Sep 2012

• #6

Thanks gents.
I'm relatively proficient, but do have a couple of question.

How do I drain the system? Are we talking the whole heating system or just the hot water portion?

Level off valve?

 

Hugh Jaleak

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• 29 Sep 2012

• #7

You cant drain the HW seperately, the entire system needs draining to below the level of the valve you wish to replace. Assuming you have two cisterns (tanks) in the loft, isolate the feed to the smaller of the two. Attach a hose to a drain off on a downstairs radiator, and open the drain off. (Ensure water is actually coming out the hose!)

Let the water drain for a bit, i'd say once you hear a loud gurgling from the upstairs rads you wont have to let much more out. Slacken one nut on the valve, any more than a few drips and you've not let enough water out. If ok undo both nuts, remove valve. Replace.

Once replaced, refill system, vent all radiators and cylinder coil if vent fitted. Switch back on and check operation of valve.