What are the best/reliable pressure compensating drippers. I need them to use on our house waste water recycling system. I have easy access to this brand http://www.popeproducts.com.au/products/drip-watering-solutions/precision-drippers/2-l-h-precision-dripper These are sold at our local bunnings hardware here in Australia. I guess it is a good idea to be able to unscrew the the cap for cleaning. Are there any better brands etc?