I have 1. It was an RO canister and I drilled and tapped the in and out holes to 1/2-14 NPTF. This one has slight crack inside on the out tube but shouldn't harm anything, it's low pressure anyway. Doesn't leak. I did 3 and I am currently using 2 for my carbon and gfo and they work great. It will use the brs clear tubes inside. 25.00 plus shipping.