Product review (1 stars): I'd recommend a pass...
This is apparently a hit or miss product and I missed. I followed all the instructions and it fits perfectly, no leaks, but water basically doesn't flow through it. We'll to be fair a trickle flows through it, but it never improves... If you've got 10 minutes to fill a glass of water it will work for you...  You might get lucky and get one that works properly, but I'd recommend that you keep looking... I'm glad I'm only out the cost of one....