hi Roger. I have the Master DOC 9440 fitted with the 9420.40 Hydrofoamer pumps. Would there be any performance advantage gained by fitting 2x 9430.040 Hydrofoamers ? Thanks
You could use one and cap off the other pump attachment. The performance would be between the 9420 and 9440, you could not use 2 9430 pumps, it would over foam. You would also need to use the taller 9420 standpipe and cut it down slightly.
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