Ququyi 1/2 Inch PVC Bulkhead Water Tank Connector Adapter Fitting with Plugs Thru-Bulk Pipe Fitting for Rain Barrels, Aquariums, Ponds(Set of 3)

The media could not be loaded. I built a custom moving bed filter for my koi pond using these. I used the 3" version.I used 3 and connected to a 65 gallon trash can that I put a large air bladder to "boil" K3 media. I had one of these fittings close to the bottom side, and two near the top for water that would exit and make it's way toward a waterfall.These sealed well (no issue with the threads for me!) to the can, flat surface. I did use silicon to ensure no leaks but I don't think this was necessary, however these are now buried and if there were leaks later (I checked before burying) I didn't want to have to dig it up to address.I LOVED the included piece that was included that lets you seal off the fitting. I drilled a series of holes in these so water could flow through but keeps the K3 media from entering the pipes. Without this part I would have had to spend more money and time figuring out a solution that would accomplish the task, in the case of these fittings I just drilled some holes!I used another two of these, and they went through a hole I made in some flexible EPM pond liner that I used for the waterfall. Essentially water enters a bowl (made of the liner) and as it rises it spills over a rock into the pond. For this application I did not need the included caps.

I use a large plastic baby pool for summer water play for my dogs. Emptying the pool is a royal pain…I have to bale most of the water out with a bucket or pan, then tip it over. I added this to the lower part of the “wall” to make emptying the pool easier. It works great! Now I just unscrew the plug and let the bulk of the water drain out on its own, then I tip it over for the remaining 2-3 inches of water.

High quality material that is strong enough to handle being tightened.

Used teflon tape to finish the sealant. Thought the rubber ring could help seal but it just went through half way.

worked well

very good quality and good seals.

This fitting comes with one silicone gasket but mine leaks. I think it needs 2 gaskets, one for inside and one for the outside.

Use these to tap my rain barrels. Allow good water flow for garden maintenance