Changing a sprayer pump

[Wobblebox]

My current 6 year old sprayer has a Comet pump and the valve springs are always breaking, even the heavier duty ones. It is also a bit of a pig to remove from the sprayer being 2x 4 cyl pumps piggy backed together, so there’s twice the pipe work in a confined area (an oversight by myself when ordering the sprayer)
The combined pump capacity is only 250 l/min. The sprayer only does ag chem, no fert.
I am thinking to replace pump with a single 6 cyl AR pump (as old sprayer had one and had no issues with it) and get rid of some pipe work or a hydraulic drive centrifugal pump?
Anything I should be wary of, or are there some better Comet valve springs available?

 

[Will Blackburn]

Get it changed

 

[David.]

Price a Hardi 363 pump as well, and decide if premium is worth it to you, I think they are better made and longer lasting than the AR pumps all day long personally.

 

[Will Blackburn]

I have a good 25yo A and R pump for sale (on a mounted Knight sprayer)

Got an A and R pump on the replacement, easy to work with.

 

[Wobblebox]

Just been thinking about this a bit more,
Is the general view that Comet pumps are and AR ones a better?
When buying the sprayer I was advised against going for a centrifugal pump if not using it for fert, why would that be?

 

[Classichay]

I found twin pumps give an easier flow regulation when your fair licking on.