Tomato Cage Fittings for PVC Pipe

Models should load in correct orientation to print without supports.  

I used PETG. You will want to print with as little cooling as possible for stronger layers as these are put under a lot of stress. I have been using these for 3 years already and have only had a couple fittings break. 

I give you a few options here.

1. Personally, I recommend using the one labeled “3 sided fitting 1_0V _75H”.  This makes a 3-sided cage and uses 1" schedule 40 PVC pipe for vertical posts and 3/4" schedule 40 for the horizontal members.  This is the best balance of strength and cost in my opinion.  (note the outer pipe diameters are larger)

2. There is also a “3 sided fitting _75V _75H and this is the same but uses 3/4” for verticals, but the result is a way too wobbly in the legs unless you use something stronger than pvc. 3/4" PVC posts may be just fine on smaller frames. Mine were 5 feet tall.

3. The other option is “4 sided fitting 1_0V _75H”.  This makes a 4-sided cage but does require that half the fittings are “4 sided fitting 1_0V _75H_w diag” which includes provisions for a diagonal member to hold the frame square.

I used wood screws to secure the pipes in the fittings. Drill pilot holes slightly smaller than the screws.

I use t posts to anchor these down. Mostly old broken in half ones. To keep wind from tipping them over, I anchor at least 2 corners. 

 I included step and Fusion 360 files so you can modify as needed.

Again, I think the  3 sided 1_0V_75H is the best option overall. I bought 10 foot 1" sch 40 pipe and cut them in half for the posts and used 3/4" sch 40 pipe cut to 2 foot lengths for the horizontal pieces. That makes a pretty big support structure for large tomato plants.

Updates:

• 19 June 2026 - Corrected the PVC pipe size callouts and part names. For some reason I had all the pipe sizes called out and named wrong which I am sure confused the heck out of anyone trying  to use these fittings.  These parts fit 1" and 3/4" schedule 40 PVC pipe.