Domestic water pump

[Kelpie]

I'd like to have a spare pump for the water system. Currently there is a Shurflo diaphragm pump installed. If I can't source a like for like replacement, what parameters are important to make sure it will play happily with the rest of the system?
There's no accumulator, no calorifier, and it's a 12v system. The pump is mounted very low so no priming issues.

 

[[70521]]

I'd like to have a spare pump for the water system. Currently there is a Shurflo diaphragm pump installed. If I can't source a like for like replacement, what parameters are important to make sure it will play happily with the rest of the system?
There's no accumulator, no calorifier, and it's a 12v system. The pump is mounted very low so no priming issues.

I have just replaced my fresh water pump with one of these

Jabsco 31620-0092

 

[Kelpie]

I have just replaced my fresh water pump with one of these

Jabsco 31620-0092

Thanks. That's about twice the (UK) price of the Shurflo. Seeing as this is just to sit on a shelf as a spare, I'm hoping not to spend too much on it.

 

[Kelpie]

Given it's just as a spare, would something like this work?
https://www.amazon.es/Seaflo-4LPM-B...ocphy=1005407&hvtargid=pla-350786543718&psc=1

 

[Wansworth]

A tip Iread,install new spare and keep old one as spare the you know it works