Leaking shower pump

[Chris Holford]

There is a leak from the end flange; I guess there is a gasket or an
'O'ring which has failed. Can anyone confirm this or add helpful
information?
The pump is labelled 'Grunfos' 'Watermill' and looks like their 'Danube'
model but has a blue body rather than the red shown on their website.
http://imgur.com/XvJlCwj
http://imgur.com/tIrfCGI

--
Chris Holford

[newshound]

Without wishing to question your diagnosis, I would have said a leak at
the flange was unusual. More likely to be at the rotating seal where the
motor shaft goes into the pump body, or at the flexible hose connection.
But it could be that one of the flange parts is cracked.

The first thing I would try is to go round the flange screws and see if
any of them seem a bit loose. You should not need much torque to seal on
a rubber gasket or O ring.

Having tried that I would be inclined to whip the flange off and have a
look at the gasket (take the hose off first). Obviously, you need to
isolate the water supply or find a strategy for coping with a bit of
water leakage, and switch off the electrics. It's a "big name" pump so
spares should be available, but you can often get away with removing the
seal and replacing it with silicone sealant, or using sealant over the
existing seal. Either way, allow time for curing before putting the
water pressure back on.

[Andrew Gabriel]

In article <516b1805$0$38889$c3e8da3$f07d...@news.astraweb.com>,

newshound <news...@fairadsl.co.uk> writes:
> On 14/04/2013 21:37, Chris Holford wrote:
>> There is a leak from the end flange; I guess there is a gasket or an
>> 'O'ring which has failed. Can anyone confirm this or add helpful
>> information?
>> The pump is labelled 'Grunfos' 'Watermill' and looks like their 'Danube'
>> model but has a blue body rather than the red shown on their website.
>> http://imgur.com/XvJlCwj
>> http://imgur.com/tIrfCGI
>>
> Without wishing to question your diagnosis, I would have said a leak at
> the flange was unusual. More likely to be at the rotating seal where the
> motor shaft goes into the pump body, or at the flexible hose connection.
> But it could be that one of the flange parts is cracked.

That can happen if the pump has been left in place when the
boiler has been converted to a combi at mains pressure.
Pump should be removed when this is done, but that's often
overlooked.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

[Chris Holford]

In article <nokA4JAe...@brownswell.myzen.co.uk>, Chris Holford
<c.ho...@brownswell.myzen.co.uk> writes

Thanks for the helpful replies; I've had another look at it today. I was
lucky to spot a drip just forming and it was coming from the outlet pipe
connection and running down so it seemed to drip off the flange. So that
is a much easier job -fingers crossed!
Thanks again.
--
Chris Holford