What replacement circulating pump do I need?

[buggslondon]

Hi there,

I think my pump is on its way out and want to replace it before winter hits.

It is not a recognised brand or model number so I am struggling to understand the type of pump I need to buy for a like for like replacement. There are some numbers in a table on the head but I don't know what they represent. (see photo)

I keep reading about models such as 15-50 and 15-60 and 25-55 or 25-60 etc but I don't have a clue what any of these mean or how they correspond to the numbers on the head of my pump.

Any help would be most welcome.

Apologies, not sure why the photo is coming out upside down!

Many thanks.

 

[Dotty]

What size system do you have? How many radiators, how many floors to your house?

You probably need any domestic pump that deals with a 5m head

 

[Billy Bob Bob]

Standard 130mm ports on that pump.its a british gas version,myson were the manufacturers later becoming CP (circulating pumps),best bet would be to get a Grundfos 15/60

 

[Thedeester1]

Hi there,

I think my pump is on its way out and want to replace it before winter hits.

It is not a recognised brand or model number so I am struggling to understand the type of pump I need to buy for a like for like replacement. There are some numbers in a table on the head but I don't know what they represent. (see photo)

I keep reading about models such as 15-50 and 15-60 and 25-55 or 25-60 etc but I don't have a clue what any of these mean or how they correspond to the numbers on the head of my pump.

Any help would be most welcome.

Apologies, not sure why the photo is coming out upside down!

Many thanks.View attachment 28028

I wouldn't worry about those numbers too much. On the electrical side of the pump there is a switch for 3 speeds. Those numbers relate to those. Its hard to see from the photo but I think the first number is flow rate. The second is electrical watts and the third is electrical amps. (The first could be RPM?). What pump to buy? I would recommend a WILO brand pump. They are expensive but last for ever. I just replaced one that is 20 years old and its only problem is scale blockage.

 

[buggslondon]

What size system do you have? How many radiators, how many floors to your house?

You probably need any domestic pump that deals with a 5m head

Hi, I have 8 Radiators over 2 floors and the hot water element in the tank is also driven by this pump

 

[townfanjon]

Post 3 mate , a grunfoss 15/60 will be sound . Slightly cheaper makes available eg wilo , a 15/50 would suffice though

 

[Darren Jackson]

Either a 15/50 or a 15/60 will do the job. The first number 15 is the bore through the pump being 15mm and the 50 or 60 is the head 50 being 5m of head and the 60 is 6m of head. A two storey house will probably only need a 15/50. But if your not sure of the head than go for the 15/ 60 to be sure. No real difference in price either.

 

[buggslondon]

Thanks to you all for your help, all is clear now

 

[ChrisC2]

What did you chose and how is it going?

 

[buggslondon]

What did you chose and how is it going?

I chose this one and it is doing a great job. A Wilo yonos 6m. Item 59045 from Screwfix