Glue for Bottle Caps to PVC in 11 bottle system ...

[andy]

here is another idea try finding a bottle that fits over the size pipe you are using snugly, gallon water bottles from store fit perfect on 1"pvc ,use plumbers pvc tape to make tight seal. put short 1 3/4 long piece in "t" push bottle down for seal . going to post a pic of my 11 plant custom unit