Replacement for Grundfos 15-50 x18 ?

JeffBxxx · 21 Aug 2010

Hi All,

After reading many related posts and getting some useful pointers, could you please help with a question...

I have a Boilermate2000 (from a Wimpey new build in 2003) and the hot water pump seems to be giving up the ghost. Sometimes I get nice hot water ok, but most of the time now it just runs stone cold. Giving the pump the occaisional tap or flicking the speed setting back and forth worked for a while but recently I've only been saved by swithing to the "emergency hot water" setting on the Boilermate, but I think I'm stretching my luck.

The pump is a Grundfos 15-50 X18, P/N 59525452, IP44, 230V, 50hz, 2uf, Class H, Max 10bar, 1.5" connections. The Boilermate manual says it's part number XB001.

I've measured the end to end length (allowing for a few mm thread going into the valve nut) and it's exactly 130mm.

The question is please, can I replace this pump with any of these:

Grundfos 15-50 Selectric 130 or
Grundfos 15-50 Alpha 2 130 or
any Grundfos 15-50 130 pump?

Thank you very much indeed, much appreciated guys (and girls if any!)

Jeff

nicknox · 21 Aug 2010

As far as I'm aware you do need a particular pump for the Boilermate 2000. Should be the same as original (x18). But I'd probably get the sensors checked first as they are prone to failure.

D_Hailsham · 21 Aug 2010

JeffBxxx said:
The pump is a Grundfos 15-50 X18, P/N 59525452, IP44, 230V, 50hz, 2uf, Class H, Max 10bar, 1.5" connections. The Boilermate manual says it's part number XB001.

Grundfos no longer list the 15-50 X18 and they do not have a replacement listed.

You can still get the Boilermate XB001, though it is probably not a Grundfos.

For example: http://www.keeptheheaton.com/acatalog/Gledhill_Boilermate_Spares.html

45yearsagasman · 21 Aug 2010

Before you go changing the hw pump it would be prudent to check the dhw sensor fitted near the plate heat exch.These are prone to failure and are easily changed.Turn off cold supply to 2000 and away you go.
PS you can use a standard 15/50 if the pump is required.

doitall · 21 Aug 2010

If you do go the new pump road, just buy a new head, tiss only 4 screws.

JeffBxxx · 21 Aug 2010

Hi All,

Thank you so much for your replies and advice, very grateful.

I'll check / replace the dhw sensor first and if still a problem then I'll replace just the pump head with any 15-50 130 unit.

I'd welcome any further comments or advice, but otherwise thanks again!

Jeff

doitall · 22 Aug 2010

You can buy just the head, and save about a tenner.

beermontypython · 12 Sep 2010

I have a faulty 15/50 130, I have seen a 15/50 130 head listed on Ebay but not sure what I have to do with it as it doesn't show any threads for conecting the valves to, and would I need to drain the syatem if I use the new head .
Appreciate any advise thanks

kevplumb · 12 Sep 2010

turn off pump valves
dissconnect electrics
place a tray under the pump

undo the 4 allen screws and remove the head

fit new head tighten screws open valves check for leaks

reconnect electrics and bleed

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beermontypython · 12 Sep 2010

THANKS,,, I looked at the pump and valves, the valves look as if they have leaked very slightly over the years and are well furred up so I will probably have difficulty even turning them off so It's probably better to replace the lot at the same time..
Thank you anyway

diynot

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Replacement for Grundfos 15-50 x18 ?

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