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rws
06-05-2010, 07:36 AM
I have several plastic 50 gallon drums. I was thinking bout manifolding them together to collect ran water. I was going to set them horizontal, pipe the lower holes together for a pump feed, and link the top holes for fill.

The drums have two different thread "bungs", one fine and one course. Are there PVC fittings made to fit these, or will I have to drill the caps out and glue pipe to them? The fine thread hole looks like it may take a pipe thread, and I'll check that, but definitely not the course thread.

Abner
06-05-2010, 08:22 AM
My experience with plastic drums are that there are 2 different thread sizes on the "big" hole. 2" IPS and some other thread which there are some fittings for.
The small holes are 3/4" IPS
Try Ryan Herco or maybe a good Ag supply store.
http://www.ryanherco.com/

winchman
06-05-2010, 09:34 AM
According to McMaster-Carr page 1697, the two large fittings are 2" NPT and 2" Buttress thread.

Duffy
06-05-2010, 09:35 AM
A supplier of PVC pipe and fittings will have a selection of gasketed flange fittings that are intended for plastic tanks. Be advised that you WILL have difficulty removing all the washed-in junk from your drums, unless you have hand access.
Anybody thinking of doing this is advised to try and obtain food-service drums. They have screw-off lids that simplify both installing fittings and removing junk. Hole saws make short work of cutting into these barrels, and a trim router works for bigger openings.

PTSideshow
06-05-2010, 10:11 AM
Here is one source for all the plastic things you may ever need they have them in stock generally and they ship fast. I have been dealing with them for over 25 years.
US Plastic Supply (http://www.usplastic.com/)
:D

squirrel
06-05-2010, 10:27 AM
I have several plastic 50 gallon drums. I was thinking bout manifolding them together to collect ran water. I was going to set them horizontal, pipe the lower holes together for a pump feed, and link the top holes for fill.

The drums have two different thread "bungs", one fine and one course. Are there PVC fittings made to fit these, or will I have to drill the caps out and glue pipe to them? The fine thread hole looks like it may take a pipe thread, and I'll check that, but definitely not the course thread.
They sell those ready to go at Big R stores for under $50 each, that includes nice hole with a screen a lower bung with a garden hose valve on the bottom. Then you don't have to worry about residual contamination.

Evan
06-06-2010, 01:45 AM
I have tanks made from plastic drums. They work fine but this year I decided we needed more capacity. The climate is becoming hotter and dryer so I built a tank from plywood. It holds 1000 litres (about 264 gallons) and only cost around $50. It is made from 3/4" plywood and rough sawn fir with all the inside seams caulked with Bondo and then the seams were fiberglassed. All cracks and knots were filled with Bondo too. Then I painted the inside with 5 coats of marine hull paint into which I mixed a quart of stain sealer primer. The outside is coated with urethane varnish and the lid is fitted with very fine mesh stainless steel screen that I picked up surplus years ago for $3 per meter.

This will keep the garden watered for a long dry spell and will also be useful for fire fighting. The water is pumped to where it is needed by a regular sump pump. The tank is completely watertight, not one drop of leakage.

http://ixian.ca/pics7/tank2.jpg

http://ixian.ca/pics7/tank3.jpg