Rubber Grommet 1/2 Inch, Hydro Rubber Grommet Donut Type to make Waterproof Seal in DIY Hydroponic Systems and 16mm or 1/2 Inch Barbed Elbow Tee Straight Y Connector and Vinyl Tubing (Pack of 25)

Heavy duty, better than a normal grommet

These things are perfect for the function! find the chart the company produces for size of hole/grommet/pipe you'll be using to make sure you're purchasing the right size. these smaller ones worked great and didnt require any extras to install nicely. They've been running for months now and i havent seen a single leak!

Work fantastic. No leaks

I thought 1/2 inch meant it would work for 1/2 inch PVC pipe, like a uniseal. The hole in the center of these is 3/8 inch and will stretch to 1/2 inch. Turns out this will work for me. I tried a 3/4 inch mounting hole and a 7/8 inch hole and with the 7/8 hole, my 1/2 inch barbs get a tight fit.

Good product just be careful about size. Measure the outside diameter of the pipe you will insert into the grommet then get that size. Example 1/2” PVC is 3/4” outside diameter.

High quality and fits perfectly. Exactly what I needed for my hydroponic buckets. Worked as described and great price!

The grommets worked as advertised. I used them in my hydroponic setup to put the drain in the 3" pvc pipe I used for my net cups. After drilling the proper sized hole . I inserted them with a twisting motion and was able to install my small drain line for the return of the fluid to the fluid tank. Would buy again when needed.

This is a great product. It made setting up a flow thru hydro system so easy to construct. Just drill a whole in a pail, insert the grommet, the barbed connector and attach the hose. Simple and very cost effective.

as described

Said fits 1/2" pipe for hydro systems (Dutch buckets) but didn't. Ended up using copper pipe instead.... tight fit but got it done.