Hose port on a gravity-fed plastic tank

[ds18s20]

Hi everyone,

I need to make a gravity-fed water tank out of a big laundry detergent container. The container has the typical push-valve at the bottom - so far perfect for what I need. I can cut the push valve but then I am left with a hole at the bottom of the container.

I know what I need but I dont know what its called - I need a port that will screw into that hole and allow me to insert tubing onto the port and get it watertight with a screw ring. So back to that "port" - what is it?

The ultimate objective is to be able to connect tubing to the tank and have water flow into the tubing by the force of gravity?

Brian

[Mike Swearingen]

Why aren't you just feeding the gravity-flow tubing into the top by drilling hole in the cap?

[patrick88]

It sounds like a boiler drain. They make different sizes and you might find one for the size you need.

[Rancher]

I know what I need but I dont know what its called - I need a port that will screw into that hole and allow me to insert tubing onto the port and get it watertight with a screw ring. So back to that "port" - what is it?Look for the places that sell large Poly water tanks, like watertanks.com or usplastics.com they sell a bung fitting that inserts from the inside and has a nut/gasket that seals from the outside, the fitting has a NPT size threaded female fitting to adapt to.

Rancher

[gardner]

I think you are looking for "through", "bulkhead" or "tank" fitting. Something that clamps onto the hole in your tank and attaches a pipe or hose.

http://www.truetex.com/bulkhead.htm
http://www.santafewatergardens.com/VINYL_THROUGH_FITTING_1_1_2_p/st300000.htm
http://www.watertanks.com/category/132/