Ball valve is dripping and a replacement washer didn't cure the issue so time to change. It's a 1/2" Type2 but how do I know if it's high or low pressure? I ask after the fact as I took the old one off, went to B&Q and bought what looks like an identical replacement. It's all fitted and appears to work fine but only after installation did I see mention of high/low pressure. The one I've fitted is low pressure. Will this be OK? It fills fine and shuts off OK or do I need to go and get a high pressure version.