Trust me, the V2 from Ashbys is absolute garbage. 1 It puts damaging back pressure on your pump which eventually wears out the pump due to overload. 2 Pressure at the wand or hand tool is no more than a mild mist. 3 Put cold water through it on full temp and all you get is tepid to cold water. 4 Reliability on these things is shocking, they break easily.
Get Ashbys to take off the 55oC limit they put on your immersion heater (Dont listen when they rattle on about pump reliability at higher temps) get them to calibrate accurately, use GOOD quality powders that don't scale and damage your pump and run your solution up to 80+oC. Get some real heat going without the need to use a stupid unreliable piece of c**p such as the V2.
Matt