Hi there, I got a job to clean this persons conservatory roof, he said use a jet washer, but am thinking it will be too powerful?? So anyway I brought myself a 5lt pump from B&Q for £20 (Verve) and virosol £15 it total, and I have a wfp which connects to outdoor tap. I hope this works, will take pictures nxt fri before and after if it does work, bit sceptical because never done this before. Delevery for virasol anyone know? (Cleaning warehouse) Spent £35 in total and quoted £45 so after this one if I get anymore then ill be making more profit, obvs still gotta buy virosol every nown again.