also for the 1/4 inch side you could use john guest stem adapters to your 1/4 inch tee.
http://www.johnguest.com/Home/applications/beverages-and-drinks-dispense/Polypropylene-Fittings/Polypropylene-Fittings---Imperial/STEM-ADAPTOR.aspx
use 1/8 x 1/4 tefen reducer coupling from link below. if you look up on tefen website you can find distributors in your country.
http://www.tefenplastic.com/catalogue/product/727
hope this helps and good luck growing
