Replacing pump on powers shower - pump help!

[cluelessplumber]

Hi,
I am planning to replace the cartridge on a Grohe Automatic 2000, as the water is only running cold, after being intermittently hot/cold. Also, I am going to replace the pump as this is now leaking (Stuart Monsoon 36 1.2 bar).

The pump has only 1 pipe in and 1 pipe out, whereas I thought it was normal to take in hot and cold and pump out hot and cold. I don;t really understand what is going on, but I was going to replace it with a Salamander NP 55 1.6 bar pump as it too only has an in and an out!

Does this sound like a reasonalbe thing to do?

Thanks.

 

[seco services]

i take it the pump is fed from the mixer then the pump feeds the showerhead.

 

[cluelessplumber]

OK, thanks.

Is this an easy thing to do with no plumbing knowledge? The flexible hose connectors on the current pump seem to have nut-tightened connections, but the current pumps are described as having push-in connectors.

 

[seco services]

easy enough