Need some help and opinions please. I want a pressure sprayer to spray cleaner onto guttering. I had a cheap one and it wasn't up for the job. I'm not going to modify or make a sprayer as I don't want to go down that route but at the same time don't want to spend £70-£100 on a 90 psi sprayer if I can help it. The only sprayer I have found online that states the psi is this one. The Solo 461 version http://www.mowdirect.co.uk/acatalog/GARDEN_SPRAYERS.html Will 45psi be enough? Does anyone know what sort of pressure the cheaper gardening ones produce? Or can anyone recommend one they're using? Cheers people.