Need PVC Pipe help

What about using some type of PVC tee combined with a flexible pipe coupling or reducer?

Make a normal PVC tee, a stub of larger pipe, then attach the reducing coupling where your smaller pipe can slide in and out?

Something like this coming off your tee.

Looks like a 6"x6"x1.5" reducing T is made. I would use that and then reduce from the 1.5" down to the 3/4".

Just out of curiosity, what is this for?

It's for a hydroponic garden. Look up "A-Frame Hydroponic Garden" on the YouTubes.

Basically the 6" pipe runs horizontal, with several 3" holes across the top for small pots to fit into. It's capped on both ends. Water gets pumped into the 6" pipe on one end and flows to the other end. On the other end, except on the bottom, is where the 3/4" pvc drain gets inserted. How far up the big pipe you push the small pipe determines the depth of the water held in the 6" pipe.


You stack several of these 6" pipes on an A Frame. You can use 4" pipe, but the root balls have a better chance to clog the channel. Somewhere in all of this is a reservoir of water with nutrients, and all the individual drain pipes all drain back to the reservoir. A timer runs the pump intermittently. I will have 48 plants in a 24 sq ft area.

This will not allow for adjustments of the 3/4” pipe. It’d be glued in place permanently

So you're doing a tiered NFT? Good news... that water will heat up and start losing o2, and bad bacteria will move in quickly. Most legit hydroponic growers use aquarium chillers to cool their reservoirs down to at least 68, if it is being recycled like nft does.

To do it right you will need a couple of fitting’s.


6”x6”x3” T fitting

3” to 3/4” reducer bushing fnpt

Then you just need your 3/4” pipe to have a threaded end.

When you want to seal it you just need to get a 3/4” threaded plug like this.

Although if you just need to shutoff the flow to the 3/4” it would be much easier to put a pvc ball valve on the 3/4” line so you don’t have to keep disconnecting/Capping/reconnecting.

Note: 3/4” fnpt is not the same as 3/4” hose threads for a garden hose. If you are trying to connect a garden hose be sure you get the proper garden hose threaded connection.