The 7091 cannor produce a wave, you would need 6091, 7092 or 7096. I don't expect this pump to do much on a 270, keep in mind a 6215 wavebox essentially uses a 6305 and is rated to 390 gallons approx, the older 6212 uses a 6201 and was capable of about a 320. I know the first wavebox prototypes used a 6100 and could really run about a 210 at most.