Hi Mos,
What are you using the pump for??
I have coated the inside of my tank with fiber glass. Aassemleing the plate stack now, with 7 effective plates 2 live and 5 neutrals. Thinking of a PMW thats reverses the polariyt say at 50 Htz. and 75 volts.
Our propblem is we seam to make HHO, but not enough pressure. Presant output one litre per three minutes.
I eventually found a English translation of the N/L GEET single auto plans. But will finish this HHO project first. I suspect they would work well togethere.