well i wanted to know if there are any sort of a plug to put at the end of the hose on a boom so when you wash out or move you don't drop concrete all over the place

I recently encountered such a situation, where I had to drop 20 feet of 4" rubber hose down through a 10" hole to pump a floor that was 16 feet below the hole. My company made a cap from a piece of 4" pipe with a collar welded on one end and a plate on the other. Anytime I had to move to another hole I just capped of the end and moved. No mess and everyone was happy. Just remember to take the cap off with the hose laying down because of the pressure in the line.

yea they make drip caps, you push them in then screw a wing nut to tighten them, not sure where you get them tho, I seen a vac truck that used the same ones maybe talk to them.

It takes 10 mins to make one. its the cheapest route or you can buy them or invest in an aircuff

I had on made. It's just the metal end piece off an old 4" hose. I also welded a short piece of chain with clip on it so the driver doesn't drop it in his mixer.

If you do not want to be a DRIP

use an air cuff

All other methods require the use of a double ended tip hose.

 drain your tip section and hose ( into mixer or in the hole) kink your tip hose with a wire halo, wrap it tight and stick a rag, plastic bag, newspaper or any thing in the end, fold up and move. it's free( just ask the crew for some tie wire) I have at least 3 halos made up at all times on my truck, and no chance of failure on the cuff. as for pipe this would not work, need a clamp on head. I do lots of moves and my boom is spotless.

make a wire ring before you start pumping out of tie wire, when ur done pumping have the guy who is running the hose kink the hose and put the ring around it and swing it to the mixer to wash out, same thing to move but keep the hose kinked tight and fold up and move

Hell ya V-dawg you know how we do! checking out your profile bro you definently are the best oiler around bro I'll put my money on you against any other oiler in the country you'll burn em!

FYI - Anything you physically close off the tip hose with (including kinking it over & wiring shut, use a drip cap or end cap) has the potential to create a significant safety hazard if you forget to open before pressuring up the system (stuff happens always).  This is what makes the air cuff a very safe product.  If you close off the cuff with 90 PSI of air pressure & forget to open it before pressuring up the line, 91, 92, or 93 PSI of concrete line pressure will compress the air & it will push through the hose anyway.  It's certainly NOT GOOD FOR THE HOSE to do this, but the risk of a catastrophic failure is greatly reduced (if not eliminated).